MOHAVE MAR 6, 2016 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ****************** | ******* 369 ****** | ****************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 5 v = Heat Units accumulated from JAN 1 - FEB 27 HEAT UNITS -------------------------------- HUs are running about 8 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : FEB 28 - MAR 5 This Week : MAR 6 - MAR 12 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 73 41 31 46 ---- Normal 78 44 33 61 Recorded 86 42 42 86 0.00 2015 84 46 34 87 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 58.8 MAR 2 ; Min = 55 FEB 28 WEATHER UPDATE -------------------------------- -Cloudy & cooler conditions are expected early this week as a storm system moves across northern Mexico. Temperatures will cool to below normal levels Monday & Tuesday then rebound to above normal by late in the week. Precipitation with this system is expected to be light with highest amounts in southern AZ. A 2nd storm is expected this weekend & may provide another round of cool & wet weather. --Minimum soil temperatures (at~8am) should exceed 60F prior to planting. Soils approach 60F at 8am when minimum air temperatures (at sunrise) remain above 47F. To review local soil temperature data go to http://ag.arizona.edu/azmet & click on the button labeled Agricultural Stations Current Conditions. MOHAVE MAR 13, 2016 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ********************* | ******** 426 ******** | ********************* | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 12 v = Heat Units accumulated from JAN 1 - MAR 5 HEAT UNITS -------------------------------- HUs are running about 7 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 6 - MAR 12 This Week : MAR 13 - MAR 19 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 78 44 33 61 ---- Normal 81 45 34 73 Recorded 78 41 39 57 0.02 2015 86 48 46 95 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 63.9 MAR 6 ; Min = 52.9 MAR 8 WEATHER UPDATE -------------------------------- -Sunny, warm & dry conditions are expected this week with temperatures averaging nearly 10 degrees above normal. Current 10-14 day forecasts suggest the rest of March will continue warm & dry. Longer term, the 90-day forecast continues shows a strong wet bias, suggesting wet spring conditions. -Heat unit accumulation at most low elevation production areas now exceeds 400 which signals the opening of the planting window for long, full season cotton. However, minimum soil temperatures are still below optimal levels in many areas due to cool morning temperatures. Minimum soil temperatures should exceed 60F prior to planting. Soils approach 60F at 8am when minimum air temperatures stay above 47F. For current soil temperatures go to http://ag.arizona.edu/azmet. MOHAVE MAR 6, 2016 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ****************** | ******* 369 ****** | ****************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 5 v = Heat Units accumulated from JAN 1 - FEB 27 HEAT UNITS -------------------------------- HUs are running about 8 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : FEB 28 - MAR 5 This Week : MAR 6 - MAR 12 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 73 41 31 46 ---- Normal 78 44 33 61 Recorded 86 42 42 86 0.00 2015 84 46 34 87 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 58.8 MAR 2 ; Min = 55 FEB 28 WEATHER UPDATE -------------------------------- -Cloudy & cooler conditions are expected early this week as a storm system moves across northern Mexico. Temperatures will cool to below normal levels Monday & Tuesday then rebound to above normal by late in the week. Precipitation with this system is expected to be light with highest amounts in southern AZ. A 2nd storm is expected this weekend & may provide another round of cool & wet weather. --Minimum soil temperatures (at~8am) should exceed 60F prior to planting. Soils approach 60F at 8am when minimum air temperatures (at sunrise) remain above 47F. To review local soil temperature data go to http://ag.arizona.edu/azmet & click on the button labeled Agricultural Stations Current Conditions. MOHAVE MAR 20, 2016 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************* | ********** 508 ********** | ************************* | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 19 v = Heat Units accumulated from JAN 1 - MAR 12 HEAT UNITS -------------------------------- HUs are running about 8 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 13 - MAR 19 This Week : MAR 20 - MAR 26 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 45 34 73 ---- Normal 80 46 33 73 Recorded 86 42 38 82 0.00 2015 88 48 44 96 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61.2 MAR 19 ; Min = 57.2 MAR 17 WEATHER UPDATE -------------------------------- -A sunny & hot Monday will be followed by windy & cooler conditions midweek as a storm system passes north of the region. Temperatures will cool from 15 degrees above normal to near normal Wednesday & Thursday. Warmer conditions are expected late in the week, followed by the arrival of another storm system late this weekend. No precipitation is expected this week. The CPC's latest long range forecast for April exhibits a moderate warm bias & a weak wet bias (exception: normal in SW AZ). Forecasts for April-June exhibit weak warm & wet biases. -Minimum soil temperatures should exceed 60F at planting. Soils approach 60F at 8am when minimum air temperatures stay above 47F. For current soil temperatures go to http://ag.arizona.edu/azmet. MOHAVE MAR 27, 2016 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ***************************** | ************ 586 ************ | ***************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 26 v = Heat Units accumulated from JAN 1 - MAR 19 HEAT UNITS -------------------------------- HUs are running about 8 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 20 - MAR 26 This Week : MAR 27 - APR 2 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 80 46 33 73 ---- Normal 81 47 33 77 Recorded 83 43 29 77 0.00 2015 88 46 40 94 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.2 MAR 22 ; Min = 57.7 MAR 24 WEATHER UPDATE -------------------------------- -A strong storm system will move across the Great Basin this week, bringing high winds & below normal temperatures Tuesday through Thursday. Precipitation with this storm will be limited to high elevation areas of central & northern AZ. Temperatures will return to above normal levels by the weekend. -Snow pack above Lake Powell has diminished due to recent dry weather & presently rests at 92% of the 30-yr median value. Present forecasts for Colorado River flow for April-July call for 5,200,000 Acre Feet or 80% of median flow. -Minimum soil temperatures (STn) should exceed 60F at planting. STn approach 60F when minimum air temperatures stay above 47F. For current weather including soil temperatures go to http://ag.arizona.edu/azmet. Click on "Agricultural Stations" MOHAVE APR 3, 2016 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ******************************** | ************** 649 ************* | ******************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 2 v = Heat Units accumulated from JAN 1 - MAR 26 HEAT UNITS -------------------------------- HUs are running about 6 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 27 - APR 2 This Week : APR 3 - APR 9 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 47 33 77 ---- Normal 82 49 33 83 Recorded 79 43 33 62 0.00 2015 81 43 29 69 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 62.1 MAR 28 ; Min = 57.4 MAR 27 WEATHER UPDATE -------------------------------- -Mostly sunny & dry through mid-week with very warm daytime temperatures. A more unsettled pattern will develop late this week as a pair of storms moves across the area. Expect increasing clouds & humidity, cooler temperatures & a chance for precipitation Thursday-Sunday. Neither storm system is cold, but temperatures are expected to return to near normal as these systems impact the region. -Snow pack above Lake Powell improved last week & currently rests at rests at 95% of the 30-yr median value. Present Colorado River flow forecasts for April- July call for 5,360,000 Acre Feet or 83% of median flow. -A good cotton planting forecast: clear & dry weather with highs above 80F, lows above 47F & minimum soil temperatures above 60F. MOHAVE COTTON DEVELOPMENT ADVISORY APR 10, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/1 ********* 432 +3 days | v | | | | | | | | 3/15****** 297 +2 days | | | | | | | | | 4/1 ** 117 +2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to APR 9 v = Heat Units on APR 2; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 754; Last year = 878; Normal = 661 HUs since Jan 1 are running about 7 days ahead of normal. HU last week = 103 HISTORICAL STATISTICS -------------------------------- Last Week : APR 3 - APR 9 This Week : APR 10 - APR 16 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 82 49 33 83 ---- Normal 85 49 32 90 Recorded 86 52 45 103 0.41 2015 86 45 33 86 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 Water Use (last week): .31" .31" .31" WEATHER UPDATE -------------------------------- --A weak storm system will pass through AZ Monday & Tuesday, resulting in cooler temperatures & a chance for showers. Warmer & drier conditions will return mid- week, only to be followed by another storm system this weekend that will result in cooler temperatures & a chance for precipitation. Chances for precipitation from the weekend system will be higher in more northern production areas. -A good cotton planting forecast: clear & dry weather with highs above 80F, lows above 47F & minimum soil temperatures above 60F. --Pinhead square (PHS) refers to the stage of cotton development when the crop first forms flower buds (squares). Early plantings in western AZ should be at or beyond PHS which typically occurs at ~700 heat units after planting. MOHAVE COTTON DEVELOPMENT ADVISORY APR 17, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/1 ********** 508 +2 days | v | | | | | | | | 3/15******* 373 +1 day |v | | | | | | | | 4/1 **** 193 +1 day | | | | | | | | | 4/15 11 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to APR 16 v = Heat Units on APR 9; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 830; Last year = 964; Normal = 751 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 77 HISTORICAL STATISTICS -------------------------------- Last Week : APR 10 - APR 16 This Week : APR 17 - APR 23 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 85 49 32 90 ---- Normal 88 52 33 102 Recorded 79 53 48 77 0.34 2015 82 48 37 83 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 Water Use (last week): .3" .3" .3" .3" WEATHER UPDATE -------------------------------- --High pressure will develop over AZ during the work week, resulting in clear skies & very warm temperatures. Another storm system is expected to impact AZ this weekend, resulting in cooler, unsettled conditions. Longer term forecasts suggest this unsettled pattern could persist through the end of the month. --The storm system that moved across Colorado this weekend produced heavy snow in the Colorado mountains, increasing spring runoff estimates by ~300,000 AF. --Pinhead square (PHS) refers to the stage of cotton development when the crop first forms flower buds (squares). PHS typically occurs ~700 heat units after planting. Early plantings in western AZ should be at or beyond PHS. MOHAVE COTTON DEVELOPMENT ADVISORY APR 24, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/1 ************ 608 +1 day | v | | | | | | | | 3/15********* 473 0 days | v | | | | | | | | 4/1 ****** 293 0 days | | | | | | | | | 4/15** 111 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to APR 23 v = Heat Units on APR 16; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 930; Last year = 1047; Normal = 852 HUs since Jan 1 are running about 5 days ahead of normal. HU last week = 100 HISTORICAL STATISTICS -------------------------------- Last Week : APR 17 - APR 23 This Week : APR 24 - APR 30 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 88 52 33 102 ---- Normal 91 54 34 116 Recorded 89 49 41 100 0.00 2015 93 52 43 115 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 Water Use (last week): .39" .39" .39" .39" WEATHER UPDATE -------------------------------- --Three storm systems will impact AZ this week, resulting in windy conditions, much cooler temperatures & a chance for rain. The 1st system will pass north of AZ Monday, bringing high winds & much cooler temperatures. The next 2 systems will move across AZ Thursday & Sunday, bringing more wind, cooler temperatures & a slight chance for rain. Temperatures should average ~5F below normal. --Growers in central AZ are encouraged to plant shorter season varieties as HU accumulation now exceeds 900-1000 across the region (see graph above). --Pinhead square (PHS) refers to the stage of cotton development when the crop first forms squares. PHS typically occurs ~700 heat units after planting. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 1, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/1 ************** 678 -1 day | v | | | | | | | | 3/15*********** 543 -2 days | v | | | | | | | | 4/1 ******* 363 -2 days |v | | | | | | | | 4/15**** 181 -3 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to APR 30 v = Heat Units on APR 23; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1000; Last year = 1162; Normal = 969 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 72 HISTORICAL STATISTICS -------------------------------- Last Week : APR 24 - APR 30 This Week : MAY 1 - MAY 7 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 91 54 34 116 ---- Normal 93 56 35 126 Recorded 79 48 45 72 0.13 2015 84 54 49 103 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 Water Use (last week): .3" .3" .3" .3" WEATHER UPDATE -------------------------------- --High pressure will develop over AZ early this week, resulting in clear skies & much warmer temperatures through Thursday. A strong storm system will impact the region late this week. Expect very windy conditions Thursday, followed by much cooler temperatures through the weekend. Forecasts suggest a slight chance for rain, particularly in more northerly production areas. --Growers are encouraged to plant shorter season varieties as heat unit (HU) accumulation now exceeds 800 in most production areas. --Pinhead square (PHS) refers to the stage of cotton development when the crop first forms squares, typically at nodes 5-7. PHS typically occurs ~700 HU after planting. These first squares develop into flowers ~1200 HU after planting. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 8, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | 3/1 **************** 785 -2 days | v | | | | | | | | 3/15************* 650 -3 days | v | | | | | | | | 4/1 ********* 470 -3 days | v | | | | | | | | 4/15****** 288 -4 days | | | | | | | | | 5/1 ** 90 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 7 v = Heat Units on APR 30; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1107; Last year = 1265; Normal = 1095 HUs since Jan 1 are running about 1 day ahead of normal. HU last week = 106 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 1 - MAY 7 This Week : MAY 8 - MAY 14 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 93 56 35 126 ---- Normal 97 58 37 136 Recorded 87 54 48 106 0.14 2015 88 52 40 100 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .45" .38" .38" .38" .38" WEATHER UPDATE -------------------------------- --The cool weekend weather will dissipate early this week as high pressure re- develops over AZ. Expect sunny skies, low humidity & a rapid warming trend. Daytime temperatures will run more than 10F above normal late in the week with many low elevation production areas topping 100F. Slightly cooler temperatures are expected for the weekend as another storm system passes to the north. --Pinhead square (PHS) refers to the stage of cotton development when the crop first forms squares, typically at nodes 5-7. PHS typically occurs ~700 HU after planting. These first squares develop into flowers ~1200 HU after planting. --The May 1 forecast for Colorado River flow (Apr-Jul) is 5.5 MAF (77% of avg). More recent ESP modeling projects ~5.8 MAF, reflecting recent wet weather. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 15, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | v | | | | | | | 3/1 ****************** 915 -3 days | v| | | | | | | | 3/15**************** 780 -3 days | v | | | | | | | | 4/1 ************ 600 -3 days | v | | | | | | | | 4/15******** 418 -4 days |v | | | | | | | | 5/1 **** 220 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 14 v = Heat Units on MAY 7; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1237; Last year = 1365; Normal = 1231 HUs since Jan 1 are running about normal. HU last week = 130 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 8 - MAY 14 This Week : MAY 15 - MAY 21 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 97 58 37 136 ---- Normal 98 60 39 145 Recorded 95 56 46 130 0.00 2015 88 54 40 112 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .72" .52" .46" .46" .46" WEATHER UPDATE -------------------------------- --A storm system will drop into the Southwest this week, bringing increased winds, cooler temperatures & a slight chance for precipitation mid-week. Precipitation is more likely in northern & central production areas. Warmer & drier weather will return late in the week. --Recent wet weather in the Colorado River Basin has improved flow forecasts. The most recent Ensemble Streamflow Prediction calls for April-July flow of 6.2 MAF, 86% of average. Current precipitation forecasts call for another wet week in the Colorado Basin which could further improve flow forecasts. --First squares typically appear at nodes 5-7 at ~700 HU after planting (see graph above). These first squares develop into flowers ~1200 HU after planting. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 22, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | v | | | | | | 3/1 ********************* 1053 -3 days | | v | | | | | | | 3/15****************** 918 -4 days | v | | | | | | | | 4/1 *************** 738 -4 days | v | | | | | | | | 4/15*********** 556 -4 days | v | | | | | | | | 5/1 ******* 358 -2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 21 v = Heat Units on MAY 14; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1375; Last year = 1477; Normal = 1376 HUs since Jan 1 are running about normal. HU last week = 139 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 15 - MAY 21 This Week : MAY 22 - MAY 28 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 98 60 39 145 ---- Normal 96 60 42 142 Recorded 91 61 44 139 0.00 2015 100 59 41 147 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.01" .79" .5" .5" .5" WEATHER UPDATE -------------------------------- --Expect cool & breezy conditions as a trough of low pressure develops over the Southwest this week. Storm systems associated with this pattern will track north of AZ, resulting in little chance for precipitation. However, these systems will draw cooler air into AZ & generate windy conditions at times. --The most recent Ensemble Streamflow Prediction for the Colorado River calls for spring flow of 6,600,000 Acre Feet (92% of average) with more precipitation expected late this week. --Nitrogen fertilizer is best applied in split applications between pinhead square & peak bloom. For more details see publication az1243 at: http://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az1243.pdf MOHAVE COTTON DEVELOPMENT ADVISORY MAY 29, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v | | | | | | 3/1 *********************** 1162 -4 days | | v | | | | | | 3/15********************* 1027 -5 days | |v | | | | | | | 4/1 ***************** 847 -5 days | v | | | | | | | | 4/15************* 665 -5 days | v | | | | | | | | 5/1 ********* 467 -3 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 28 v = Heat Units on MAY 21; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1484; Last year = 1624; Normal = 1518 HUs since Jan 1 are running about 2 days behind normal. HU last week = 108 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 22 - MAY 28 This Week : MAY 29 - JUN 4 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 96 60 42 142 ---- Normal 101 63 43 157 Recorded 88 53 46 108 0.00 2015 100 59 35 147 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .95" .78" .55" .4" .4" WEATHER UPDATE -------------------------------- --High pressure will develop over AZ this week, producing clear & dry weather with very hot daytime temperatures, particularly during the latter half of the week. Some moisture may leak into far southeast AZ Monday & Tuesday, producing a slight chance of high elevation thunderstorms. Central & western production areas should remain dry this week. The most recent Ensemble Streamflow Predict- ion for the Colorado River calls for 6,660,000 Acre Feet of spring flow (93% of average); more precipitation is expected in the basin this week. --Nitrogen fertilizer is best applied in split applications between pinhead square & peak bloom. For more details see publication az1243 at: http://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az1243.pdf. MOHAVE COTTON DEVELOPMENT ADVISORY JUN 5, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v| | | | | | 3/1 ************************** 1313 -4 days | | | v | | | | | | 3/15************************ 1178 -5 days | | v| | | | | | | 4/1 ******************** 998 -5 days | v| | | | | | | | 4/15**************** 816 -5 days | v | | | | | | | | 5/1 ************ 618 -3 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 4 v = Heat Units on MAY 28; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1635; Last year = 1771; Normal = 1675 HUs since Jan 1 are running about 2 days behind normal. HU last week = 151 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 29 - JUN 4 This Week : JUN 5 - JUN 11 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 101 63 43 157 ---- Normal 99 62 43 154 Recorded 107 59 50 151 0.00 2015 104 66 43 172 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.27" 1.08" .82" .56" .45" WEATHER UPDATE -------------------------------- --High pressure will remain in place Monday resulting in one final day of very hot temperatures. A trough will pass through the Great Basin Tuesday producing a cooling trend that will bring temperatures back to normal by mid-week. Some moisture is expected to leak into central & southeast AZ during the latter half of the week resulting in widely scattered mountain thunderstorms. No significant precipitation is expected in cotton production areas from these storms. --The most recent Ensemble Streamflow Prediction for the Colorado River remains unchanged at ~6,660,000 Acre Feet of spring flow (92% of average). MOHAVE COTTON DEVELOPMENT ADVISORY JUN 12, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v | | | | | 3/1 ****************************** 1497 -3 days | | | v | | | | | 3/15*************************** 1362 -4 days | | | v | | | | | | 4/1 ************************ 1182 -4 days | | v | | | | | | | 4/15******************** 1000 -4 days | v | | | | | | | | 5/1 **************** 802 -2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 11 v = Heat Units on JUN 4; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1819; Last year = 1943; Normal = 1829 HUs since Jan 1 are running about normal. HU last week = 184 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 5 - JUN 11 This Week : JUN 12 - JUN 18 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 99 62 43 154 ---- Normal 103 63 45 161 Recorded 107 70 48 184 0.00 2015 115 68 50 181 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.01" 1.76" 1.41" 1.07" .69" WEATHER UPDATE -------------------------------- --Mild temperatures early in the week will give way to very hot temperatures by the coming weekend as intense high pressure develops over AZ. High tempera- tures this coming weekend are expected to reach 115F or higher in lower eleva- tion production areas. Clear skies & low humidity will accompany the heat, pro- ducing high rates of evaporative demand. Growers are encouraged to monitor soil moisture & avoid water stress. Water stress can lead to square abortion & lower rates of fruit retention. --The most recent Ensemble Streamflow Prediction for the Colorado River calls for ~6,700,000 Acre Feet of spring flow (93% of average). MOHAVE COTTON DEVELOPMENT ADVISORY JUN 19, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v| | | | | 3/1 ********************************* 1659 -3 days | | | | v | | | | | 3/15****************************** 1524 -3 days | | | v | | | | | 4/1 *************************** 1344 -3 days | | | v | | | | | | 4/15*********************** 1162 -4 days | | v | | | | | | | 5/1 ******************* 964 -2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 18 v = Heat Units on JUN 11; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1981; Last year = 2124; Normal = 1990 HUs since Jan 1 are running about normal. HU last week = 162 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 12 - JUN 18 This Week : JUN 19 - JUN 25 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 63 45 161 ---- Normal 104 65 48 169 Recorded 99 65 50 162 0.00 2015 113 70 41 187 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.98" 1.76" 1.47" 1.18" .86" HEAT STRESS LEVELS -------------------------------- Date 6/12 6/13 6/14 6/15 6/16 6/17 6/18 Stress ns ns ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --Intense high pressure will keep extreme temperatures in place early this week. Some cooling is expected mid-week as moisture from a tropical system moves into the region, though temperatures will remain above normal. The moisture may pro- duce thunderstorms in/adjacent to high elevation areas in central & eastern AZ. Drier air will return to central & western areas late in the week. --Heat stress developed in selected areas this past weekend, particularly in locations where winds kept night temperatures very warm. The influx of moisture this week may produce additional & more widespread heat stress. Heat stress con- ditions can be monitored at: http://www.ag.arizona.edu/azmet/data/00stress1.txt MOHAVE COTTON DEVELOPMENT ADVISORY JUN 26, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/1 ************************************* 1848 -2 days | | | | v | | | | 3/15********************************** 1713 -2 days | | | | v | | | | | 4/1 ******************************* 1533 -2 days | | | v| | | | | | 4/15*************************** 1351 -3 days | | |v | | | | | | 5/1 *********************** 1153 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 25 v = Heat Units on JUN 18; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2170; Last year = 2311; Normal = 2159 HUs since Jan 1 are running about normal. HU last week = 187 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 19 - JUN 25 This Week : JUN 26 - JUL 2 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 104 65 48 169 ---- Normal 107 68 51 176 Recorded 109 72 59 187 0.00 2015 111 81 55 209 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.26" 2.04" 1.76" 1.46" 1.14" HEAT STRESS LEVELS -------------------------------- Date 6/19 6/20 6/21 6/22 6/23 6/24 6/25 Stress ns L1 L1 ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --Strong early season monsoon flow will develop this week, replacing last week's intense heat. Expect elevated humidity levels statewide with a chance for after- noon & evening thunderstorms each day. Temperatures have already moderated to near normal levels in central & eastern production areas & will return to normal in western production areas with the arrival of the moisture early this week. --Heat stress developed in some low desert locations last week, but generally registered in the less severe Level 1 category. Higher humidity levels this week could generate more severe Level 2 stress in locations where night temperatures remain high. More details at http://www.ag.arizona.edu/azmet/data/00stress1.txt MOHAVE COTTON DEVELOPMENT ADVISORY JUL 3, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/1 ***************************************** 2039 -1 day | | | | | v | | | | 3/15************************************** 1904 -2 days | | | | v | | | | 4/1 ********************************** 1724 -2 days | | | | v | | | | | 4/15******************************* 1542 -2 days | | | v| | | | | | 5/1 *************************** 1344 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 2 v = Heat Units on JUN 25; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2361; Last year = 2520; Normal = 2335 HUs since Jan 1 are running about 1 day ahead of normal. HU last week = 191 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 26 - JUL 2 This Week : JUL 3 - JUL 9 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 107 68 51 176 ---- Normal 105 71 56 184 Recorded 106 73 68 191 1.48 2015 104 72 59 186 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.36" 2.16" 1.9" 1.63" 1.33" HEAT STRESS LEVELS -------------------------------- Date 6/27 6/28 6/29 6/30 7/1 7/2 7/3 Stress L1 L2 L1 ns ns L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --High pressure is expected to cut off the monsoon flow regime this week. Expect near-normal temperatures with clear skies & low humidity. The exception to this forecast is in southeastern AZ where a mid-week surge of humidity may produce isolated showers & thunderstorms Wednesday & Thursday. --Heat stress developed in many low desert production areas last week. However, temperatures cooled substantially & much of the heat stress registered as the less severe Level 1 stress. Lower humidity & cooler night temperatures should minimize problems with heat stress this week. Local heat stress conditions can be monitored at http://www.ag.arizona.edu/azmet/data/00stress1.txt MOHAVE COTTON DEVELOPMENT ADVISORY JUL 10, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | 3/1 ******************************************** 2218 -1 day | | | | | v | | | | 3/15****************************************** 2083 -2 days | | | | | v | | | | 4/1 ************************************** 1903 -2 days | | | | v | | | | 4/15********************************** 1721 -2 days | | | | v | | | | | 5/1 ****************************** 1523 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 9 v = Heat Units on JUL 2; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2540; Last year = 2706; Normal = 2519 HUs since Jan 1 are running about 1 day ahead of normal. HU last week = 180 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 3 - JUL 9 This Week : JUL 10 - JUL 16 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 71 56 184 ---- Normal 106 72 58 188 Recorded 101 70 61 180 0.00 2015 108 70 46 181 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.47" 2.47" 2.25" 1.97" 1.67" HEAT STRESS LEVELS -------------------------------- Date 7/3 7/4 7/5 7/6 7/7 7/8 7/9 Stress L1 L1 ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --Dry southwesterly flow will remain in place through mid-week, resulting in hot days, low humidity & moderate nighttime temperatures. Expect temperatures to run ~3 degrees above normal during this period. Monsoon flow is expected to redevelop later in the week, resulting in slightly cooler daytime tempera- tures, higher humidity & a return to afternoon & evening thunderstorms. This pattern is expected to continue through the weekend & into early next week. --Spring flow season for the Colorado River ends on 31 July. Flow is expected to total 6.7 MAF (94% of average). Projections for the water year (ends 30 September) now stand at 9.9 MAF or 92% of average. MOHAVE COTTON DEVELOPMENT ADVISORY JUL 17, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/1 ************************************************ 2395 -2 days | | | | | |v | | | 3/15********************************************* 2260 -2 days | | | | | v | | | | 4/1 ****************************************** 2080 -2 days | | | | | v | | | | 4/15************************************** 1898 -3 days | | | | v| | | | | 5/1 ********************************** 1700 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 16 v = Heat Units on JUL 9; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2717; Last year = 2887; Normal = 2707 HUs since Jan 1 are running about normal. HU last week = 176 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 10 - JUL 16 This Week : JUL 17 - JUL 23 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 106 72 58 188 ---- Normal 105 73 60 190 Recorded 109 67 49 176 0.00 2015 104 72 61 186 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.8" 2.8" 2.8" 2.54" 2.2" HEAT STRESS LEVELS -------------------------------- Date 7/10 7/11 7/12 7/13 7/14 7/15 7/16 Stress ns ns ns ns ns ns L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --Monsoon flow will remain in place through mid-week, resulting in near-normal temperatures, elevated humidity levels & a chance for afternoon/evening thunder- storms. Moisture levels & precipitation chances will be highest in central & eastern production areas. Drier air is expected to enter the region late in the week, resulting in much warmer temperatures & a reduction in the chances for precipitation. Temperatures for the week should average ~2 degrees above normal. --Elevated temperature & humidity levels should generate heat stress in low desert production areas this week. Heat stress causes shedding of young bolls (<5 days post bloom). See http://www.ag.arizona.edu/azmet/cotton.htm#HEATSTRESS MOHAVE COTTON DEVELOPMENT ADVISORY JUL 24, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/1 **************************************************** 2597 -1 day | | | | | | v | | | 3/15************************************************* 2462 -2 days | | | | | |v | | | 4/1 ********************************************** 2282 -2 days | | | | | v | | | | 4/15****************************************** 2100 -2 days | | | | | v | | | | 5/1 ************************************** 1902 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 23 v = Heat Units on JUL 16; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2919; Last year = 3073; Normal = 2896 HUs since Jan 1 are running about 1 day ahead of normal. HU last week = 202 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 17 - JUL 23 This Week : JUL 24 - JUL 30 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 73 60 190 ---- Normal 105 74 61 192 Recorded 110 76 60 202 0.00 2015 108 72 46 189 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.74" 2.74" 2.74" 2.74" 2.48" HEAT STRESS LEVELS -------------------------------- Date 7/17 7/18 7/19 7/20 7/21 7/22 7/23 Stress L1 L1 L1 L1 L2 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --Monsoon flow will develop across the region this week, resulting in increased humidity & a chance for afternoon & evening thunderstorms in central & eastern production areas. The best chances for precipitation are early & late in the week as some drying is expected mid-week, particularly in central & western production areas. Temperatures will continue to run above normal & when combined with the increased humidity will produce heat stress in central & western AZ. Heat stress causes shedding of young bolls (<5 days old) which lowers overall fruit retention. For details go to http://www.ag.arizona.edu/azmet/cotton.htm#HEATSTRESS MOHAVE COTTON DEVELOPMENT ADVISORY JUL 31, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v| | | 3/1 ******************************************************** 2805 -1 day | | | | | | v | | | 3/15***************************************************** 2670 -1 day | | | | | | v | | | 4/1 ************************************************** 2490 -1 day | | | | | |v | | | 4/15********************************************** 2308 -2 days | | | | | v | | | | 5/1 ****************************************** 2110 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 30 v = Heat Units on JUL 23; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3127; Last year = 3262; Normal = 3089 HUs since Jan 1 are running about 1 day ahead of normal. HU last week = 209 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 24 - JUL 30 This Week : JUL 31 - AUG 6 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 74 61 192 ---- Normal 105 72 59 189 Recorded 110 80 67 209 0.00 2015 111 72 55 190 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.57" 2.57" 2.57" 2.57" 2.57" HEAT STRESS LEVELS -------------------------------- Date 7/24 7/25 7/26 7/27 7/28 7/29 7/30 Stress L2 L2 L2 L2 L2 L2 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -High moisture levels in combination with a favorable atmospheric flow regime will produce a wet start to the week. Expect very humid conditions with a good chance for rainfall each day through Wednesday. Heavy rain is possible with this weather pattern. Drier air is expected to reenter the region late in the week, reducing the chances for precipitation, particularly in western AZ. Humidity levels will remain sufficient for isolated afternoon and evening thunderstorms in central & eastern AZ late this week. Temperatures will drop to below normal levels through mid-week, then return to normal as the drier conditions return. -Colorado River flow for April-July was ~6.6 MAF--slightly above median flow. MOHAVE COTTON DEVELOPMENT ADVISORY AUG 7, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/1 ************************************************************ 3007 0 days | | | | | | v | | 3/15********************************************************* 2872 -1 day | | | | | | v | | | 4/1 ****************************************************** 2692 -1 day | | | | | | v | | | 4/15************************************************** 2510 -1 day | | | | | |v | | | 5/1 ********************************************** 2312 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to AUG 6 v = Heat Units on JUL 30; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3329; Last year = 3452; Normal = 3277 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 203 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 31 - AUG 6 This Week : AUG 7 - AUG 13 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 72 59 189 ---- Normal 106 72 59 186 Recorded 103 78 71 203 0.29 2015 113 75 55 197 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.25" 2.25" 2.25" 2.25" 2.25" HEAT STRESS LEVELS -------------------------------- Date 7/31 8/1 8/2 8/3 8/4 8/5 8/6 Stress L2 L2 L1 L1 ns L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Moisture from Tropical Storm Javier is expected to produce very wet conditions this week. The week will begin with warm & relatively dry conditions Monday. Tropical moisture will enter AZ Tuesday & remain in place through Thursday. Cooler temperatures will accompany the moisture as will greatly elevated chances for precipitation. Current forecasts call for precipitation amounts ranging from 1.0-2.0" in the desert areas of central & southeast AZ with much higher amounts in the mountains. Warmer & drier conditions are expected late in the week as the moisture departs to the east. MOHAVE COTTON DEVELOPMENT ADVISORY AUG 14, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/1 **************************************************************** 3203 0 days | | | | | | | v | | 3/15************************************************************* 3068 0 days | | | | | | |v | | 4/1 ********************************************************** 2888 0 days | | | | | | v | | | 4/15****************************************************** 2706 -1 day | | | | | | v | | | 5/1 ************************************************** 2508 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to AUG 13 v = Heat Units on AUG 6; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3525; Last year = 3649; Normal = 3464 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 196 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 7 - AUG 13 This Week : AUG 14 - AUG 20 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 106 72 59 186 ---- Normal 105 72 60 188 Recorded 106 75 66 196 0.00 2015 111 75 57 201 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.11" 2.29" 2.3" 2.3" 2.3" HEAT STRESS LEVELS -------------------------------- Date 8/7 8/8 8/9 8/10 8/11 8/12 8/13 Stress L1 ns ns L1 L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -High pressure developed over the region this past weekend, putting an end to the humid, tropical conditions that impacted central & eastern AZ last week. High pressure will remain in place through Wednesday, producing clear skies, lower humidity & above normal temperatures. Monsoon flow will return late in the week, resulting in slightly cooler temperatures & a chance for afternoon & evening thunderstorms each day. -Heat stress information is available from AZMET website at the following URLs: (http://www.ag.arizona.edu/azmet/data/00stress1.txt) for statewide report & (http://www.ag.arizona.edu/azmet/cotton.htm#HEATSTRESS) the real time monitors. MOHAVE COTTON DEVELOPMENT ADVISORY AUG 21, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v| | 3/1 ******************************************************************** 3394 0 days | | | | | | | v | | 3/15***************************************************************** 3259 0 days | | | | | | | v | | 4/1 ************************************************************** 3079 0 days | | | | | | |v | | 4/15********************************************************** 2897 -1 day | | | | | | v | | | 5/1 ****************************************************** 2699 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to AUG 20 v = Heat Units on AUG 13; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3716; Last year = 3850; Normal = 3652 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 190 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 14 - AUG 20 This Week : AUG 21 - AUG 27 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 72 60 188 ---- Normal 105 71 60 184 Recorded 107 72 64 190 0.00 2015 109 77 59 201 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.74" 1.91" 2.12" 2.15" 2.15" HEAT STRESS LEVELS -------------------------------- Date 8/14 8/15 8/16 8/17 8/18 8/19 8/20 Stress L1 L1 ns L1 L1 ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Monsoon moisture will remain in place Monday, providing a chance for isolated afternoon and evening thunderstorms. Drier air will enter AZ Tuesday & remain in place until late in the week, resulting in near normal temperatures & greatly reduced chances for precipitation. Longer term forecast models indicate a return to monsoon moisture by late in the week. -Heat stress diminished late last week as cooler temperatures entered the region. In most years, cooler temperatures & lengthening nights combine to end the heat stress season by early September. For more information see AZMET website at: http://www.ag.arizona.edu/azmet/cotton.htm MOHAVE COTTON DEVELOPMENT ADVISORY AUG 28, 2016 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | | 3573 | 3/1 ********************************************************************* 0 days | | | | | | | v 3438 | 3/15********************************************************************* 0 days | | | | | | | v | | 4/1 ***************************************************************** 3258 0 days | | | | | | | v | | 4/15************************************************************** 3076 -1 day | | | | | | |v | | 5/1 ********************************************************** 2878 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to AUG 27 v = Heat Units on AUG 20; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3895; Last year = 4051; Normal = 3836 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 179 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 21 - AUG 27 This Week : AUG 28 - SEP 3 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 71 60 184 ---- Normal 104 70 58 180 Recorded 97 71 65 179 0.37 2015 106 75 55 194 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.22" 1.36" 1.53" 1.71" 1.73" HEAT STRESS LEVELS -------------------------------- Date 8/21 8/22 8/23 8/24 8/25 8/26 8/27 Stress ns ns ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Following a hot & dry Monday, moisture will return to central & eastern AZ Tuesday, resulting in increasing chances for afternoon/evening thunderstorms mid-week. Slightly cooler temperatures will accompany the moisture. Drier air with elevated daytime temperatures will return this weekend. -The long range forecast for September exhibits a moderate warm bias & weak wet bias. The forecast for Oct-Dec reveals a strong warm bias & weak dry bias. -This will be the final advisory for the 2016 growing season. Have a safe & profitable harvest season! MOHAVE MAR 4, 2017 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************* | **** 254 **** | ************* | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 4 v = Heat Units accumulated from JAN 1 - FEB 25 HEAT UNITS -------------------------------- HUs are running about 4 days behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : FEB 26 - MAR 4 This Week : MAR 4 - MAR 11 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 72 41 31 44 ---- Normal 77 44 33 59 Recorded 68 38 40 29 0.39 2016 77 41 40 57 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 52 FEB 28 ; Min = 46.9 MAR 1 WEATHER UPDATE -------------------------------- -High pressure will result in clear & dry weather this week with very warm temp- eratures. After a cool start to the week on Monday, temperatures will increase to 10-15 degrees above normal by mid-week & remain in place for the rest of the week. Some slight moderation in temperature is expected next weekend. Long-term forecasts suggest warm & dry conditions will prevail for the next 10-14 days. -Soils typically warm to acceptable levels for germination when daytime high temperatures exceed 80F & minimum temperatures remain 48F & above. -The March 1st April-July flow forecast for the Colorado River of 10.4 MAF (145% of normal) has lessened the probability of a water shortage in 2018. MOHAVE MAR 18, 2017 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ********************* | ******** 417 ******** | ********************* | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 18 v = Heat Units accumulated from JAN 1 - MAR 11 HEAT UNITS -------------------------------- HUs are running about 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 12 - MAR 18 This Week : MAR 18 - MAR 25 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 45 34 73 ---- Normal 81 46 33 74 Recorded 92 46 44 104 0.00 2016 84 43 32 78 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 64.9 MAR 17 ; Min = 60.3 MAR 11 WEATHER UPDATE -------------------------------- -The unusual March heat wave will end with the passage of a strong storm system mid-week. Some precipitation is expected Wednesday as the system passes over AZ. Much cooler temperatures are expected Wednesday through Saturday with highs in low desert production areas remaining in the 70s. Longer-term forecasts suggest the storm track will move closer to AZ over the next 7-10 days, resulting in more unsettled weather & cooler temperatures. -Soils have warmed considerably in recent weeks & are approaching acceptable levels for planting in many areas. Growers considering planting early should closely monitor weather forecasts (see above). A good cotton planting forecast calls for clear skies with highs above 80F & lows above 47F. MOHAVE MAR 25, 2017 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************** | *********** 516 ********** | ************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 25 v = Heat Units accumulated from JAN 1 - MAR 18 HEAT UNITS -------------------------------- HUs are running about 4 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 19 - MAR 25 This Week : MAR 25 - APR 1 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 46 33 74 ---- Normal 81 47 33 75 Recorded 85 52 45 100 0.00 2016 79 43 30 63 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 69.6 MAR 22 ; Min = 61.5 MAR 24 WEATHER UPDATE -------------------------------- -An active storm track positioned near the 4-Corners will result in a week of unsettled weather. Expect warm & windy conditions Monday followed by cooler conditions Tuesday along with a slight chance for showers. Warmer conditions will return mid-week only to be replaced by cooler conditions this weekend. -March has been dry in the Colorado River basin, reducing spring & summer flow forecasts by ~10%. Considerable precipitation is forecast in the basin this week & could boost forecasts back to early March levels (9.9 MAF or 138% of normal). -A good cotton planting forecast calls for clear skies with highs above 80F & lows above 47F. MOHAVE APR 2, 2017 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ****************************** | ************* 591 ************ | ****************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 1 v = Heat Units accumulated from JAN 1 - MAR 25 HEAT UNITS -------------------------------- HUs are running about 3 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 26 - APR 1 This Week : APR 2 - APR 8 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 46 33 74 ---- Normal 81 47 33 75 Recorded 80 49 39 75 0.00 2016 79 43 30 63 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.2 MAR 27 ; Min = 61.5 APR 1 WEATHER UPDATE -------------------------------- -An active storm track located north of AZ will make for variable temperatures this week. Breezy & mild conditions Monday will be followed by windy & cooler conditions Tueday. High pressure will rebuild over AZ mid-week resulting in very warm conditions only to be followed by another trough of low pressure that will bring breezy & cooler conditions this weekend. Significant precipitation is not expected this week; temperatures should average slightly above normal. -March precipitation was below normal in the Colorado River basin, reducing spring/summer flow forecasts by ~10%. The decision regarding lake equalization (extra water release from Powell to Mead) is expected sometime later this month. MOHAVE APR 9, 2017 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ********************************** | *************** 674 ************** | ********************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 8 v = Heat Units accumulated from JAN 1 - APR 1 HEAT UNITS -------------------------------- HUs are running about 3 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 2 - APR 8 This Week : APR 9 - APR 15 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 47 33 75 ---- Normal 82 49 33 83 Recorded 83 47 42 84 0.00 2016 86 52 38 104 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.4 APR 6 ; Min = 62.4 APR 1 WEATHER UPDATE -------------------------------- -High pressure will dominate AZ weather this week, resulting in sunny & warm conditions & very low humidity. Expect mild evenings with daytime temperatures running 5-10 degrees above normal. Some breezy conditions may develop mid-week with the movement of storm systems across the Great Basin. Long range forecasts suggest another storm system could impact AZ this weekend or early next week. -Heat unit (HU) accumululation is running above normal & planting windows are open at most locations. Growers are encouraged to complete their plantings of full season varieties before HU accumulation exceeds 700. The forecasted temp- eratures this week should lead to acceptable soil temperatures for planting. -April projections for the Colorado River should be released by BOR this week. MOHAVE COTTON DEVELOPMENT ADVISORY APR 9, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/1 ********** 517 +4 days | v | | | | | | | | 3/15******* 371 +2 days | | | | | | | | | 4/1 *** 155 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to APR 9 v = Heat Units on APR 9; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 758; Last year = 754; Normal = 649 HUs since Jan 1 are running about 3 days ahead of normal. HU last week = 84 HISTORICAL STATISTICS -------------------------------- Last Week : This Week : HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 82 49 33 83 ---- Normal 84 49 32 88 Recorded 86 43 40 84 0.00 2016 79 52 55 76 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 Water Use (last week): .32" .32" .32" .32" HEAT STRESS LEVELS -------------------------------- Date 5/1 5/2 5/3 5/4 5/5 5/6 5/7 Stress ns ns ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -High pressure will continue to dominate AZ weather this week, producing sunny & very warm conditions along with very low humidity. Daytime temperatures will ex- ceed 90F in most production areas & may reach 100F in the low deserts. Windy con- ditions are expected late this week as a storm system moves across the Great Basin. -Heat unit (HU) accumulation is running above normal & planting windows are open at all locations. Growers are encouraged to plant full season varieties as soon as possible, preferably before HU accumulation exceeds the 700-800 range. -Early cotton in Yuma Co. should be at or beyond pinhead square which typically occurs at ~700 HUs after planting. MOHAVE COTTON DEVELOPMENT ADVISORY APR 23, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/1 ************ 625 +4 days | v | | | | | | | | 3/15********** 479 +2 days | v | | | | | | | | 4/1 ***** 263 0 days | | | | | | | | | 4/15** 94 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to APR 16 v = Heat Units on APR 16; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 866; Last year = 830; Normal = 737 HUs since Jan 1 are running about 3 days ahead of normal. HU last week = 108 HISTORICAL STATISTICS -------------------------------- Last Week : APR 16 - APR 22 This Week : APR 23 - APR 29 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 84 49 32 88 ---- Normal 88 51 33 101 Recorded 90 51 45 108 0.00 2016 90 48 39 100 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 Water Use (last week): .39" .39" .39" .39" WEATHER UPDATE -------------------------------- -High pressure will weaken early this week as a strong trough of low pressure develops over the West. Expect windy weather with gradual cooling through mid- week followed by more windy weather & much cooler temperatures by the weekend. Precipitation associated with this storm system is expected to remain north of most cotton production areas--the exception may be southeast AZ. -The warm, dry March weather reduced projected spring/summer flow in the Upper Colorado River, eliminating the option for much higher water releases to Lake Mead. That said, BOR is expected to release 9.0 MAF to Mead which should keep Mead above 1075'& avoid a shortage declaration for Water Year 2018. MOHAVE COTTON DEVELOPMENT ADVISORY APR 30, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v| | | | | | | | 3/1 *************** 730 +3 days | v | | | | | | | | 3/15************ 584 +1 day | v | | | | | | | | 4/1 ******* 368 -1 day |v | | | | | | | | 4/15**** 199 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to APR 23 v = Heat Units on APR 23; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 971; Last year = 930; Normal = 838 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 104 HISTORICAL STATISTICS -------------------------------- Last Week : APR 23 - APR 29 This Week : APR 30 - MAY 6 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 88 51 33 101 ---- Normal 91 54 34 114 Recorded 88 52 45 104 0.00 2016 79 48 42 70 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 Water Use (last week): .45" .45" .45" .45" WEATHER UPDATE -------------------------------- -High pressure will redevelop over AZ this week, resulting in warm weather with clear skies & light winds. Temperatures are expected to reach the 100F level by mid-week at elevations below 2000'. Another strong storm system is projected to move into CA this weekend, bringing another round of windy conditions with much cooler temperatures. Current forecasts indicate this storm may stall in the area producing a more prolonged impact. Precipitation is also possible in/near cotton production areas as early as Sunday/Monday. The current 8-14 day forecast shows acool, wet bias for AZ (http://www.cpc.noaa.gov/products/predictions/814day/). -The Bureau of Reclamation is expected to release 9.0 MAF to Mead which should keep Mead above 1075'& avoid a shortage declaration for Water Year 2018. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 7, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | |v | | | | | | | 3/1 ***************** 864 +4 days | v | | | | | | | | 3/15*************** 729 +3 days | v | | | | | | | | 4/1 ********** 510 0 days | v | | | | | | | | 4/15******* 342 0 days | | | | | | | | | 5/1 ** 99 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 6 v = Heat Units on APR 29; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1100; Last year = 1000; Normal = 952 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 130 HISTORICAL STATISTICS -------------------------------- Last Week : APR 30 - MAY 6 This Week : MAY 7 - MAY 13 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 91 54 34 114 ---- Normal 92 56 34 125 Recorded 98 54 40 130 0.00 2016 86 54 48 106 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .67" .47" .47" .47" .47" WEATHER UPDATE -------------------------------- -A strong storm system will slowly migrate across the Southwest early this week, resulting in breezy & cool conditions with a chance for showers/thunderstorms through Wednesday. High pressure will redevelop over AZ late in the week, result- ing in a return to above normal temperatures by the weekend. Long-term forecasts project the development of another strong storm by the middle of next week. The current 8-14 day forecast (http://www.cpc.noaa.gov/products/predictions/814day/) exhibits a strong bias for below normal temperatures in AZ. -Crop development is running above normal. Important early development milestones include pinhead square, susceptible square and first flower which occur at ~700, 900 and 1200 HUs after planting, respectively. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 14, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | v| | | | | | | 3/1 ******************* 963 +2 days | |v | | | | | | | 3/15***************** 828 +1 day | v | | | | | | | | 4/1 ************ 609 -1 day | v | | | | | | | | 4/15********* 441 -1 day |v | | | | | | | | 5/1 **** 198 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 13 v = Heat Units on MAY 6; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1199; Last year = 1106; Normal = 1076 HUs since Jan 1 are running about normal. HU last week = 100 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 7 - MAY 13 This Week : MAY 14 - MAY 20 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 92 56 34 125 ---- Normal 96 57 37 134 Recorded 83 55 49 100 0.43 2016 95 55 48 130 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .61" .46" .35" .35" .35" WEATHER UPDATE -------------------------------- -A series of storm systems will pass north of AZ this week, resulting in breezy conditions & below normal temperatures. Daytime temperatures will remain below 90F for much of the week with the coolest temperatures expected Tuesday. These storm systems lack moisture & precipitation chances are low this week, peaking at 10% on Thursday. Temperatures are expected to return to normal by the weekend. -Colorado River flow into Lake Powell is running 10% above normal for Water Year 2017. Flow projections for April-July snow melt season are ~23% above normal. -Crop development is running above normal. Important early development milestones include pinhead square, susceptible square & first flower which occur at ~700, 900 &1200 HUs after planting, respectively (see graph above for local conditions). MOHAVE COTTON DEVELOPMENT ADVISORY MAY 21, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | |v | | | | | | 3/1 ********************* 1056 -1 day | | v| | | | | | | 3/15****************** 921 -2 days | v | | | | | | | | 4/1 ************** 702 -4 days | v | | | | | | | | 4/15*********** 534 -4 days | v | | | | | | | | 5/1 ****** 291 -4 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 20 v = Heat Units on MAY 13; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1292; Last year = 1236; Normal = 1210 HUs since Jan 1 are running about 2 days behind normal. HU last week = 93 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 14 - MAY 20 This Week : MAY 21 - MAY 27 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 96 57 37 134 ---- Normal 98 60 39 145 Recorded 84 51 43 93 0.00 2016 91 61 46 138 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .87" .69" .42" .42" .42" WEATHER UPDATE -------------------------------- -Strong high pressure will develop over AZ early this week, resulting in hot days &mild evenings through mid-week. Daytime temperatures will exceed 100F in most low desert production areas. A trough of low pressure will develop over the West beginning Thursday, producing breezy conditions & slightly cooler temperatures late in the week. No precipitation is expected with the passage of this trough. -The first post-plant irrigation typically occurs between 800 & 1000 HUs after planting. Coarse textured soils are often irrigated at the low end of this range while the upper end of the HU range may be appropriate for medium/finer soils. -Flow into Lake Powell for Water Year 2017 is running 14% above normal. Lake levels have increased an average of 6"/day for the past two weeks. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 28, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v | | | | | | 3/1 ************************ 1202 -1 day | | v | | | | | | 3/15********************* 1067 -2 days | v | | | | | | | 4/1 ***************** 848 -3 days | v | | | | | | | | 4/15************** 680 -3 days | v | | | | | | | | 5/1 ********* 437 -3 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 27 v = Heat Units on MAY 20; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1438; Last year = 1374; Normal = 1474 HUs since Jan 1 are running about 2 days behind normal. HU last week = 146 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 21 - MAY 27 This Week : MAY 28 - JUN 3 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 98 60 39 145 ---- Normal 95 60 42 140 Recorded 103 58 43 146 0.00 2016 88 54 42 108 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.29" 1.07" .7" .52" .52" WEATHER UPDATE -------------------------------- -A weak low pressure system over Baja will result in higher humidity levels & warm temperatures early this week. Precipitation with this system will be limited to the high elevation areas of eastern AZ. Slightly cooler temperatures &lower humidity will result with the passage of this system mid-week. Another warming trend is expected by the weekend. -The first post-plant irrigation typically occurs between 800 & 1000 HUs after planting (see graph above). Coarse textured soils are often irrigated at the low end of this range while the upper end of the HU range may be appropriate for medium/finer soils. -Flow into Lake Powell for Water Year 2017 continues to run 14% above normal. MOHAVE COTTON DEVELOPMENT ADVISORY JUN 4, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v | | | | | 3/1 *************************** 1353 -1 day | | | v | | | | | | 3/15************************ 1218 -2 days | | v| | | | | | | 4/1 ******************** 999 -3 days | v | | | | | | | 4/15***************** 831 -3 days | v | | | | | | | | 5/1 ************ 588 -3 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 3 v = Heat Units on MAY 27; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1589; Last year = 1634; Normal = 1652 HUs since Jan 1 are running about 2 days behind normal. HU last week = 151 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 28 - JUN 3 This Week : JUN 4 - JUN 10 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 101 62 43 156 ---- Normal 99 62 43 154 Recorded 102 60 46 151 0.00 2016 108 70 46 184 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.31" 1.12" .81" .57" .44" WEATHER UPDATE -------------------------------- -High pressure will strengthen over AZ early this week, resulting in the hottest temperatures of the season. This high pressure system will shift to the east later in the week, allowing for a few degrees of cooling. Humidity levels will remain low in central & western AZ, but will remain above normal along the New Mexico border where a few high elevation thunderstorms are possible. Expect temperatures to average about 5 degrees above normal this week. -Growers are encouraged to closely monitor soil moisture & avoid water stress. Water stress can result in square loss & push more of the primary bloom period into the more stressful monsoon season that typically develops by mid-July. -The water level in Lake Powell will exceed the 2016 peak level early this week. MOHAVE COTTON DEVELOPMENT ADVISORY JUN 11, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v | | | | | 3/1 ****************************** 1518 0 days | | | v | | | | | 3/15**************************** 1383 -1 day | | | v | | | | | | 4/1 *********************** 1164 -3 days | | v| | | | | | | 4/15******************** 996 -3 days | v | | | | | | | | 5/1 *************** 753 -3 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 10 v = Heat Units on JUN 3; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1754; Last year = 1818; Normal = 1807 HUs since Jan 1 are running about 1 day behind normal. HU last week = 165 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 4 - JUN 10 This Week : JUN 11 - JUN 17 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 99 62 43 154 ---- Normal 102 63 45 159 Recorded 98 66 54 165 0.00 2016 99 64 51 162 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.67" 1.46" 1.13" .87" .49" HEAT STRESS LEVELS -------------------------------- Date 6/4 6/5 6/6 6/7 6/8 6/9 6/10 Stress ns ns ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Breezy & cooler weather Monday will give way to strengthening high pressure by mid-week, resulting in very hot & dry conditions by the weekend. Temperatures this coming weekend should exceed 100F in all production areas with readings above 110F likely in the low deserts. -Growers are encouraged to closely monitor soil moisture & avoid water stress as evaporative demand will run above normal this week. Water stress can result in square loss & push more of the primary bloom period into the monsoon season. -Runoff into Lake Powell remains above normal & the lake is approaching 60% of capacity (3626')--its highest the highest level since August 2012. MOHAVE COTTON DEVELOPMENT ADVISORY JUN 18, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v| | | | | 3/1 ********************************* 1658 -1 day | | | | v | | | | | 3/15****************************** 1523 -2 days | | | v| | | | | | 4/1 ************************** 1304 -4 days | | | v | | | | | | 4/15*********************** 1136 -4 days | |v | | | | | | | 5/1 ****************** 893 -4 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 17 v = Heat Units on JUN 10; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1894; Last year = 1980; Normal = 1966 HUs since Jan 1 are running about 2 days behind normal. HU last week = 139 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 11 - JUN 17 This Week : JUN 18 - JUN 24 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 102 63 45 159 ---- Normal 104 65 47 168 Recorded 101 57 48 139 0.00 2016 109 72 56 189 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.75" 1.56" 1.25" 1.01" .66" HEAT STRESS LEVELS -------------------------------- Date 6/11 6/12 6/13 6/14 6/15 6/16 6/17 Stress ns ns ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Intense high pressure will develop over AZ early this week, resulting in very hot & dry conditions. Expect record high temperatures Monday through Wednesday which translates to high temperatures above 115F in low elevation production areas. A slight amount of moisture is expected to leak into the southeast AZ this week, resulting in afternoon, mostly dry thunderstorms that could generate outflows in parts of central AZ that could produce localized high winds & dust. Slightly cooler & more humid conditions are expected by the weekend. -Monitor soil & plant water status closely. Water stress produces higher foliage temperatures which given the current forecast could lead to tissue damage. MOHAVE COTTON DEVELOPMENT ADVISORY JUN 25, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/1 ************************************* 1844 0 days | | | | v| | | | | 3/15********************************** 1709 -1 day | | | | v | | | | | 4/1 ****************************** 1490 -3 days | | | v| | | | | | 4/15************************** 1322 -3 days | | v | | | | | | 5/1 ********************** 1079 -3 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 24 v = Heat Units on JUN 17; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2080; Last year = 2169; Normal = 2134 HUs since Jan 1 are running about 1 day behind normal. HU last week = 186 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 18 - JUN 24 This Week : JUN 25 - JUL 1 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 104 65 47 168 ---- Normal 107 67 50 175 Recorded 117 69 60 186 0.00 2016 106 73 65 190 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.21" 1.99" 1.65" 1.39" 1" HEAT STRESS LEVELS -------------------------------- Date 6/18 6/19 6/20 6/21 6/22 6/23 6/24 Stress ns L1 L1 L1 ns L1 L2 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -The high pressure system responsible for last week's record heat will weaken & move south of the area by mid-week. This pattern shift will result in moderating temperatures with very low humidity. Precipitation will be limited to some high elevation thunderstorms in southeastern AZ on Monday & Tuesday. -Monitor soil & plant water status closely. Evaporative demand has been running above normal for several weeks. Shorter irrigation intervals may be warranted. -The water level in Lake Powell continues to rise & now rests at 3634', or ~63% of capacity. At present the lake is 15' higher than last year which equates to ~1.6 MAF of additional water storage. MOHAVE COTTON DEVELOPMENT ADVISORY JUL 2, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/1 ***************************************** 2031 0 days | | | | | v | | | | 3/15************************************** 1896 0 days | | | | v| | | | | 4/1 ********************************** 1677 -2 days | | | | v | | | | | 4/15****************************** 1509 -2 days | | | v | | | | | | 5/1 ************************* 1266 -2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 1 v = Heat Units on JUN 24; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2267; Last year = 2359; Normal = 2309 HUs since Jan 1 are running about 1 day behind normal. HU last week = 186 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 25 - JUL 1 This Week : JUL 2 - JUL 8 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 107 67 50 175 ---- Normal 105 70 55 182 Recorded 113 70 39 186 0.00 2016 100 70 65 180 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 3.1" 2.83" 2.41" 2.08" 1.61" HEAT STRESS LEVELS -------------------------------- Date 6/25 6/26 6/27 6/28 6/29 6/30 7/1 Stress L2 L2 ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Expect hot temperatures with increasing humidity. Moisture began entering the region over the weekend & is expected to remain in place much of the week. Temp- eratures are expected to climb back to the 110F level in central & western AZ late this week, setting up the potential for additional heat stress. Afternoon & evening thunderstorms are possible each day in southeast AZ, with expansion into central AZ later in the week. -Heat stress conditions developed early this year due to the record temperatures in late June. Cooler & drier weather last week led to less stressful conditions. Heat stress causes young 1-5-day old bolls to abort, lowering fruit retention. MOHAVE COTTON DEVELOPMENT ADVISORY JUL 9, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | 3/1 ******************************************** 2219 0 days | | | | | v | | | | 3/15****************************************** 2084 0 days | | | | | v | | | | 4/1 ************************************* 1865 -2 days | | | | v| | | | | 4/15********************************** 1697 -2 days | | | |v | | | | | 5/1 ***************************** 1454 -2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 8 v = Heat Units on JUL 1; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2455; Last year = 2539; Normal = 2492 HUs since Jan 1 are running about normal. HU last week = 190 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 2 - JUL 8 This Week : JUL 9 - JUL 15 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 70 55 182 ---- Normal 106 72 58 188 Recorded 113 71 52 190 0.30 2016 109 66 51 177 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.76" 2.76" 2.44" 2.15" 1.73" HEAT STRESS LEVELS -------------------------------- Date 7/2 7/3 7/4 7/5 7/6 7/7 7/8 Stress ns ns ns L1 L1 L2 L2 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Monsoon circulation has now developed across the state. Expect cooler & more humid conditions this week with a chance for afternoon & evening thunderstorms each day. The high pressure system responsible for directing the monsoon flow will fluctuate in position some, resulting in up & down days for storm activity. Longer term forecast models suggest enhanced precipitation this coming weekend. -Last week's high temperatures & moderate humidity produced Level 2 heat stress in some low elevation production areas. Level 2 stress often results in moderate to heavy fruit shed (young bolls). Fruit retention typically recovers with less stressful conditions. For more details: www.ag.arizona.edu/azmet/cotton.htm MOHAVE COTTON DEVELOPMENT ADVISORY JUL 16, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/1 ************************************************ 2422 +1 day | | | | | |v | | | 3/15********************************************** 2287 0 days | | | | | v | | | | 4/1 ***************************************** 2068 -1 day | | | | | v | | | | 4/15************************************** 1900 -1 day | | | | v | | | | | 5/1 ********************************* 1657 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 15 v = Heat Units on JUL 8; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2658; Last year = 2716; Normal = 2680 HUs since Jan 1 are running about normal. HU last week = 202 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 9 - JUL 15 This Week : JUL 16 - JUL 22 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 106 72 58 188 ---- Normal 105 73 59 190 Recorded 108 78 68 202 0.00 2016 109 77 57 202 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.55" 2.55" 2.55" 2.31" 1.92" HEAT STRESS LEVELS -------------------------------- Date 7/9 7/10 7/11 7/12 7/13 7/14 7/15 Stress L1 L2 L1 L1 L2 L1 L2 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Monsoon circulation will remain in place this week, resulting in cooler temp- eratures, high humidity & the chance for afternoon & evening storms each day. Heavy precipitation is possible Monday & Tuesday with the passage of an east- erly wave. Temperatures should average slightly below normal this week. -High humidity in combination with high temperatures produces heat stress which reduces fruit retention due to the loss of young bolls. Level 2 heat stress typically produces a more consistent & damaging level of fruit loss & prolonged periods of L2 stress can damage developing squares resulting in extended periods of low fruit retention. For more details: www.ag.arizona.edu/azmet/cotton.htm MOHAVE COTTON DEVELOPMENT ADVISORY JUL 23, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/1 ***************************************************** 2632 +2 days | | | | | | v | | | 3/15************************************************** 2497 +1 day | | | | | v | | | 4/1 ********************************************** 2278 0 days | | | | | v | | | | 4/15****************************************** 2110 0 days | | | | | v | | | | 5/1 ************************************* 1867 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 22 v = Heat Units on JUL 15; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2868; Last year = 2918; Normal = 2869 HUs since Jan 1 are running about 1 day ahead of normal. HU last week = 211 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 16 - JUL 22 This Week : JUL 23 - JUL 29 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 73 59 190 ---- Normal 105 74 61 192 Recorded 103 81 70 211 0.00 2016 109 81 65 208 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.37" 2.37" 2.37" 2.37" 2.09" HEAT STRESS LEVELS -------------------------------- Date 7/16 7/17 7/18 7/19 7/20 7/21 7/22 Stress L2 L2 L2 L1 L1 L1 L2 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -A humid & potentially wet Monday will be followed by a drying & warming trend through Thursday. Heavy rain is possible Monday in central & western production areas. A reduction in monsoon activity will begin Tuesday & continue into Thurs- day. Expect temperatures to return to normal by mid-week with lower humidity. Precipitation will be less widespread & mostly resident in high elevation areas. Amore favorable monsoon flow regime is expected to return this weekend. -Heat stress lessened in many areas last week due to cooling temperatures. Some areas continued to see L2 stress where night temperatures remained elevated. -Check out the new Cotton Weather webpage: www.ag.arizona.edu/azmet/cotton.htm MOHAVE COTTON DEVELOPMENT ADVISORY JUL 30, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | 3/1 ********************************************************* 2832 +2 days | | | | | | v | | | 3/15****************************************************** 2697 +1 day | | | | | | v | | | 4/1 ************************************************** 2478 0 days | | | | | |v | | | 4/15********************************************** 2310 0 days | | | | | v | | | | 5/1 ***************************************** 2067 0 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 29 v = Heat Units on JUL 22; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3068; Last year = 3126; Normal = 3061 HUs since Jan 1 are running about 1 day ahead of normal. HU last week = 201 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 23 - JUL 29 This Week : JUL 30 - AUG 5 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 74 61 192 ---- Normal 105 73 59 190 Recorded 103 77 67 201 0.03 2016 102 77 70 202 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.21" 2.21" 2.21" 2.21" 2.21" HEAT STRESS LEVELS -------------------------------- Date 7/23 7/24 7/25 7/26 7/27 7/28 7/29 Stress L2 L1 ns L1 L1 L1 L2 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -A moist monsoon pattern is expected to remain in place much of the week, result- ing in near normal temperatures & a chance for afternoon & evening thunderstorms each day. Current forecasts suggest Tuesday through Thursday could be the best days for precipitation due to the passage of a tropical, easterly wave. -The recent cooler conditions have reduced heat stress in most areas. Exceptions to this general observation have occurred in areas where cloudiness and/or winds have kept night temperatures near/above 80F. -A wet bias remains in the forecast for the next 8-14 days for much of AZ. See new Cotton Weather Webpage for details: www.ag.arizona.edu/azmet/cotton.htm. MOHAVE COTTON DEVELOPMENT ADVISORY AUG 6, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/1 ************************************************************* 3036 +3 days | | | | | | |v | | 3/15********************************************************** 2901 +2 days | | | | | | v | | | 4/1 ****************************************************** 2682 0 days | | | | | | v | | | 4/15************************************************** 2514 +1 day | | | | | v | | | 5/1 ********************************************* 2271 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to AUG 5 v = Heat Units on JUL 29; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3272; Last year = 3328; Normal = 3251 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 204 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 30 - AUG 5 This Week : AUG 6 - AUG 12 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 73 59 190 ---- Normal 106 72 59 186 Recorded 107 78 66 204 0.19 2016 106 75 67 196 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.44" 2.44" 2.44" 2.44" 2.44" HEAT STRESS LEVELS -------------------------------- Date 7/30 7/31 8/1 8/2 8/3 8/4 8/5 Stress L2 L2 L2 L1 L1 L2 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Much drier air moved into AZ late last week, leading to clear skies with warm days & much lower night temperatures. Heat stress conditions diminished with the arrival of the drier air. Dry conditions will remain through mid-week, resulting in a warming trend that will bring low desert temperatures back above 110F. A return to more favorable monsoon flow along with potential impacts from a dying Atlantic tropical storm increase the chances for precipitation late this week. -The "spring" snow melt season in the Colorado Basin concluded on 31 July. Flow into Lake Powell totaled 8.18 MAF or ~14% above the 30-year average of 7.16 MAF. -Check out new Cotton Weather Webpage : www.ag.arizona.edu/azmet/cotton.htm. MOHAVE COTTON DEVELOPMENT ADVISORY AUG 13, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | 3235 | 3/1 ***************************************************************** +3 days | | | | | | | v | | 3/15************************************************************** 3100 +2 days | | | | | | |v | | 4/1 ********************************************************** 2881 +1 day | | | | | | v | | | 4/15****************************************************** 2713 +1 day | | | | | | v | | | 5/1 ************************************************* 2470 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to AUG 12 v = Heat Units on AUG 5; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3471; Last year = 3524; Normal = 3437 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 199 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 6 - AUG 12 This Week : AUG 13 - AUG 19 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 106 72 59 186 ---- Normal 105 72 61 189 Recorded 108 76 61 199 0.00 2016 108 72 64 191 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 2.18" 2.37" 2.43" 2.43" 2.43" HEAT STRESS LEVELS -------------------------------- Date 8/6 8/7 8/8 8/9 8/10 8/11 8/12 Stress L1 L1 L1 L1 L1 L2 L2 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Another surge of very dry air will enter AZ Monday, shutting off the monsoon through Friday. Isolated thunderstorms are possible in central & eastern AZ Monday during the transition to this drier air mass. Expect clear skies, low humidity & near normal temperatures Tuesday through Friday. Longer-term fore- casts call for a return to monsoon flow this weekend. -Boll maturity estimates can assist with decisions related to crop termination. The HU requirements from flowering to the hard green and open boll stages are 600 & 1000 HUs, respectively. Go to www.ag.arizona.edu/azmet/cotton.htm for more details -- click on the button labeled Boll Maturity Estimates. MOHAVE COTTON DEVELOPMENT ADVISORY AUG 20, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v 3414 | 3/1 ******************************************************************** +3 days | | | | | | | v | 3279 | 3/15****************************************************************** +2 days | | | | | | | v | | 4/1 ************************************************************* 3060 +1 day | | | | | | |v | | 4/15********************************************************** 2892 +1 day | | | | | | v | | | 5/1 ***************************************************** 2649 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to AUG 19 v = Heat Units on AUG 12; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3650; Last year = 3715; Normal = 3626 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 180 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 13 - AUG 19 This Week : AUG 20 - AUG 26 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 72 61 189 ---- Normal 104 70 60 183 Recorded 102 70 55 180 0.00 2016 97 70 65 179 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.85" 2.03" 2.31" 2.33" 2.33" HEAT STRESS LEVELS -------------------------------- Date 8/13 8/14 8/15 8/16 8/17 8/18 8/19 Stress L2 ns ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -Sunny & dry conditions with near normal temperatures will continue through Tues- day. A trough of low pressure will impact AZ mid-week, elevating humidity levels &increasing the chances for precipitation. Drier & hotter conditions return on Friday & this coming weekend, reducing the chances for precipitation. -Long range forecasts were updated last week. Forecasts for September exhibit a weak to moderate bias for above normal temperatures & no bias for precipitation. The 90-day forecast for September thru November exhibits a strong bias for above normal temperatures & no bias relative to precipitation. For more details go to www.ag.arizona.edu/azmet/cotton.htm -- click on 30-Day or 90-Day Forecast buttons. MOHAVE COTTON DEVELOPMENT ADVISORY AUG 27, 2017 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | | v3605 | 3/1 ********************************************************************* +3 days | | | | | | | |v 3470 | 3/15********************************************************************* +2 days | | | | | | | v | | 4/1 ***************************************************************** 3251 +1 day | | | | | | | v | | 4/15************************************************************** 3083 +1 day | | | | | | v | | 5/1 ********************************************************* 2840 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to AUG 26 v = Heat Units on AUG 19; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3841; Last year = 3894; Normal = 3809 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 190 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 20 - AUG 26 This Week : AUG 27 - SEP 2 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 104 70 60 183 ---- Normal 105 70 58 181 Recorded 107 73 62 190 0.00 2016 108 70 63 181 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.38" 1.53" 1.77" 1.96" 2" HEAT STRESS LEVELS -------------------------------- Date 8/20 8/21 8/22 8/23 8/24 8/25 8/26 Stress ns ns ns ns L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- -High pressure over the Great Basin will produce hot & generally dry conditions this week. Some moisture will remain in eastern AZ & may produce some precipita- tion mid-week. Temperatures will run 4-6 degrees above normal & may exceed 110F in western AZ. Long-term forecasts suggest a tropical storm in the Pacific may lead to a surge of moisture, cooler temperatures & greater chances for precip- itation this weekend. To monitor forecasts go to the new Cotton Weather Page & click on any of the forecast buttons (www.ag.arizona.edu/azmet/cotton.htm). -This will be the final advisory for the 2017 production season. Have a safe & profitable harvest season! MOHAVE MAR 4, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | *************** | ****** 302 **** | *************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 3 v = Heat Units accumulated from JAN 1 - FEB 24 HEAT UNITS -------------------------------- HUs are running about 4 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : FEB 25 - MAR 3 This Week : MAR 4 - MAR 10 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 70 42 32 38 ---- Normal 71 41 31 41 Recorded 66 30 30 22 0.05 2017 68 39 43 28 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 52 MAR 3 ; Min = 41.7 FEB 26 WEATHER UPDATE -------------------------------- --High pressure will develop over AZ this week resulting in mostly clear weather with above normal temperatures. While no precipitation is expected during the work week, long range forecasts remain undecided regarding the weekend, with some models suggesting cooler conditions & a slight chance for rainsfall Sunday. Growers planning to plant this week should monitor updated weekend forecasts. --Minimum soil temperatures (at~8am) should exceed 60F prior to planting. Soils approach 60F at 8am when minimum air temperatures (at sunrise) remain above 47F. To review local soil temperature data go to https://ag.arizona.edu/azmet. --Snow pack in the Colorado River Basin is running at 70% of median. The current forecast for spring flow into Lake Powell stands at 47% of normal (3.4 MAF). MOHAVE MAR 11, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ***************** | ****** 345 ****** | ***************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 10 v = Heat Units accumulated from JAN 1 - MAR 3 HEAT UNITS -------------------------------- HUs are running about 2 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 4 - MAR 10 This Week : MAR 11 - MAR 17 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 71 41 31 41 ---- Normal 75 43 32 53 Recorded 72 40 28 43 0.00 2017 70 41 40 33 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61 MAR 10 ; Min = 49.3 MAR 7 WEATHER UPDATE -------------------------------- --High pressure will bring sunny, warm & dry weather through mid-week. A trough of low pressure will impact AZ late this week, resulting in windy conditions with higher humidity, cooler temperatures & a chance for rainfall beginning Friday. Growers considering planting this week are encouraged to monitor updated forecasts as most production areas are expected to receive some rainfall this weekend. --Minimum soil temperatures (at~8am) should exceed 60F prior to planting. Soils approach 60F at 8am when minimum air temperatures (at sunrise) remain above 47F. For local soil temperatures see https://www.ag.arizona.edu/azmet/cot-soil.htm --Snow pack in the Colorado River Basin is running at 68% of median. The current forecast for spring flow into Lake Powell stands at 44% of normal (3.2 MAF). MOHAVE MAR 18, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ******************** | ******** 405 ******* | ******************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 17 v = Heat Units accumulated from JAN 1 - MAR 10 HEAT UNITS -------------------------------- HUs are running about 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 11 - MAR 17 This Week : MAR 18 - MAR 24 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 75 43 32 53 ---- Normal 81 45 34 72 Recorded 75 47 46 59 0.31 2017 81 39 39 67 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 63 MAR 14 ; Min = 53.8 MAR 16 WEATHER UPDATE -------------------------------- --A cool & dry Monday will be followed by much warmer conditions through mid-week as high pressure builds over the region. Warm & dry weather will continue through mid-week with temperatures peaking on Thursday. A trough of low pressure will move across the Great Basin late this week, resulting in a slight chance for rain & a return to normal temperatures. Rain is more likely in northern production areas. --Minimum soil temperatures (at~8am) should exceed 60F prior to planting. Hand- held digital thermometers are an inexpensive means of assessing soil temperature. See https://www.ag.arizona.edu/azmet/cot-soil.htm to review soil temperatures from AZMET. Soil temperatures typically reach acceptable levels for planting when day- time air temperatures exceed 80F & minimum air temperatures exceed 47F. MOHAVE MAR 18, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ******************** | ******** 405 ******* | ******************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 17 v = Heat Units accumulated from JAN 1 - MAR 10 HEAT UNITS -------------------------------- HUs are running about 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 11 - MAR 17 This Week : MAR 18 - MAR 24 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 75 43 32 53 ---- Normal 81 45 34 72 Recorded 75 47 46 59 0.31 2017 81 39 39 67 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 63 MAR 14 ; Min = 53.8 MAR 16 WEATHER UPDATE -------------------------------- --A cool & dry Monday will be followed by much warmer conditions through mid-week as high pressure builds over the region. Warm & dry weather will continue through mid-week with temperatures peaking on Thursday. A trough of low pressure will move across the Great Basin late this week, resulting in a slight chance for rain & a return to normal temperatures. Rain is more likely in northern production areas. --Minimum soil temperatures (at~8am) should exceed 60F prior to planting. Hand- held digital thermometers are an inexpensive means of assessing soil temperature. See https://www.ag.arizona.edu/azmet/cot-soil.htm to review soil temperatures from AZMET. Soil temperatures typically reach acceptable levels for planting when day- time air temperatures exceed 80F & minimum air temperatures exceed 47F. MOHAVE MAR 25, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | *********************** | ********** 462 ******** | *********************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 24 v = Heat Units accumulated from JAN 1 - MAR 17 HEAT UNITS -------------------------------- HUs are running about 1 day behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 18 - MAR 24 This Week : MAR 25 - MAR 31 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 45 34 72 ---- Normal 81 46 33 73 Recorded 76 43 39 56 0.00 2017 93 46 44 105 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 63.3 MAR 22 ; Min = 54 MAR 20 WEATHER UPDATE -------------------------------- --A dry storm system will pass through the region early this week, resulting in windy conditions & cooler temperatures through Tuesday. Precipitation with this system will be limited to the mountains of northeast AZ. High pressure returns by mid-week, resulting in sunny skies & above normal temperatures. High temper- atures may exceed 90F in lower elevation production areas late in the week. --Growers planning to plant this week should monitor soil temperatures & updated forecasts. A good planting forecast calls for clear skies with maximum air temp- eratures above 80F and minimum air temperatures of 48F & above. --See https://www.ag.arizona.edu/azmet/cot-soil.htm to review soil temperatures from local AZMET stations. MOHAVE APR 1, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************** | *********** 529 ********** | ************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 31 v = Heat Units accumulated from JAN 1 - MAR 24 HEAT UNITS -------------------------------- HUs are running about 1 day behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 25 - MAR 31 This Week : APR 1 - APR 7 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 46 33 73 ---- Normal 80 47 33 74 Recorded 80 43 35 67 0.00 2017 84 52 45 95 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 63.3 MAR 31 ; Min = 54.9 MAR 28 WEATHER UPDATE -------------------------------- --A dry storm system will pass through the region early this week, resulting in windy conditions & cooler temperatures through Tuesday. Precipitation with this system will be limited to the mountains of northeast AZ. High pressure returns by mid-week, resulting in sunny skies & above normal temperatures. High temper- atures may exceed 90F in lower elevation production areas late in the week. --Growers planning to plant this week should monitor soil temperatures & updated forecasts. A good planting forecast calls for clear skies with maximum air temp- eratures above 80F and minimum air temperatures of 48F & above. --See https://www.ag.arizona.edu/azmet/cot-soil.htm to review soil temperatures from local AZMET stations. MOHAVE APR 8, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ******************************** | ************** 636 ************* | ******************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 7 v = Heat Units accumulated from JAN 1 - MAR 31 HEAT UNITS -------------------------------- HUs are running about 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 1 - APR 7 This Week : APR 8 - APR 14 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 80 47 33 74 ---- Normal 82 48 33 81 Recorded 89 51 43 107 0.00 2017 81 48 39 75 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 73 APR 7 ; Min = 60.8 APR 4 WEATHER UPDATE -------------------------------- --Sunny, hot & dry through mid-week with daytime temperatures approaching record levels. A strong storm system will pass north of AZ Thursday, resulting in windy & much cooler conditions Friday & Saturday. No precipitation is expected with this system. Warmer conditions will return by Sunday. --Warm spring weather has resulted in above normal HU accumulation. Growers are encouraged to complete plantings of full season varieties soon. Medium maturity varieties are recommended once HU accumulation exceeds 700-800. --Minimum soil temperatures should be 60F to ensure acceptable germination. Go to https://www.ag.arizona.edu/azmet/cot-soil.htm to review local AZMET values. --April 1 Colorado River flow projection: 3.1 MAF into Lake Powell (<50% normal). MOHAVE APR 15, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************************* | **************** 731 **************** | ************************************* | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 14 v = Heat Units accumulated from JAN 1 - APR 7 HEAT UNITS -------------------------------- HUs are running about 2 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 8 - APR 14 This Week : APR 15 - APR 21 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 82 48 33 81 ---- Normal 84 49 32 86 Recorded 87 49 32 94 0.00 2017 82 46 42 78 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 72.5 APR 8 ; Min = 62.1 APR 14 WEATHER UPDATE -------------------------------- --A pair of storm systems will impact AZ this week. The first system will enter the region Monday & Tuesday, bringing high winds Monday followed by much cooler temperatures Tuesday. Warmer conditions return Wednesday only to be followed by another windy & dry storm system Thursday & Friday. High pressure returns next weekend, resulting in a return to warm & dry conditions with less wind. Neither of this week's storm systems offer much chance for precipitation. --Growers are encouraged to complete plantings of full season varieties soon. Medium maturity varieties are recommended once HU accumulation exceeds 700-800. --Pinhead square (PHS) represents an important early developmental stage. The first PHSs typically form at nodes 5 to 7 at ~700 HUs after planting. MOHAVE APR 22, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ***************************************** | ****************** 815 ****************** | ***************************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 21 v = Heat Units accumulated from JAN 1 - APR 14 HEAT UNITS -------------------------------- HUs are running about 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 15 - APR 21 This Week : APR 22 - APR 28 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 84 49 32 86 ---- Normal 87 50 32 96 Recorded 84 46 31 85 0.00 2017 88 43 40 91 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 70.2 APR 16 ; Min = 61.2 APR 18 WEATHER UPDATE -------------------------------- --High pressure will dominate AZ weather this week, resulting in very warm temp- eratures, scattered high elevation clouds & low humidity. A weak disturbance may produce a few high elevation showers in far eastern AZ late in the week. --Medium maturity varieties are recommended once heat unit (HU) accumulation exceeds 700-800 (see Planting Date Advisory graph above). --Plant population should range from 25,000-50,000 plants/a. To assess, count the number of plants in 1/1000a & multiply by 1000. Row length = to 1/1000a: 40"row = 13'1", 38"row = 13'9", 36"row = 14'6", 30"row = 17'5". --Pinhead square (PHS) represents an important early developmental stage. The first PHSs typically form at nodes 5 to 7 at ~700 HUs after planting. MOHAVE APR 29, 2018 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | *********************************************** | ********************** 943 ******************** | *********************************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 28 v = Heat Units accumulated from JAN 1 - APR 21 HEAT UNITS -------------------------------- HUs are running about 2 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 22 - APR 28 This Week : APR 29 - MAY 5 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 87 50 32 96 ---- Normal 90 53 35 111 Recorded 97 54 46 128 0.00 2017 91 52 45 110 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 76.5 APR 27 ; Min = 70.5 APR 22 WEATHER UPDATE -------------------------------- --A strong low pressure system will impact AZ during the first half of the week. Expect windy & much cooler conditions through Wednesday. Temperature will run 8- 10 degrees below normal by mid-week. Precipitation is possible with the passage of this system, particularly in northern & high elevation production areas. Hot & dry weather returns Friday as high pressure redevelops over the region. --Plant population should range from 25,000-50,000 plants/a. To assess, count the number of plants in 1/1000a & multiply by 1000. Row length = to 1/1000a: 40"row = 13'1", 38"row = 13'9", 36"row = 14'6", 30"row = 17'5". --Pinhead square (PHS) represents an important early developmental stage. The first PHSs typically form at nodes 5 to 7 at ~700 HUs after planting. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 6, 2018 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v| | | | | | | | 3/1 *************** 742 -2 days | v | | | | | | | | 3/15************* 636 -2 days | v | | | | | | | | 4/1 ********** 487 0 days | v | | | | | | | | 4/15****** 289 -2 days | | | | | | | | | 5/1 * 55 -1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to MAY 5 v = Heat Units on APR 28; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1032; Last year = 985; Normal = 1041 HUs since Jan 1 are running about normal. HU last week = 89 HISTORICAL STATISTICS -------------------------------- Last Week : APR 29 - MAY 5 This Week : MAY 6 - MAY 12 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 92 55 34 122 ---- Normal 94 57 36 129 Recorded 85 49 45 89 0.01 2017 95 55 40 125 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .35" .33" .33" .33" .33" WEATHER UPDATE -------------------------------- --High pressure over the Southwest will produce hot & dry conditions for much of the week. Expect near record high temperatures mid-week. Windy & cooler conditions are expected late this week as a storm system passes through the Great Basin. This storm system is not expected to generate precipitation in cotton production areas. --Forecasts for Colorado River spring flow into Lake Powell now stand at 3 MAF or 42% of the average flow, which is ~7.2 MAF. --Plant population should range from 25,000-50,000 plants/a. To assess, count the number of plants in 1/1000a & multiply by 1000. Row length = to 1/1000a: 40"row = 13'1", 38"row = 13'9", 36"row = 14'6", 30"row = 17'5".