MOHAVE MAR 15, 2015 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************** | *********** 523 ********** | ************************** | | ^ 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 14 v = Heat Units accumulated from JAN 1 - MAR 7 HEAT UNITS -------------------------------- HUs are running about 15 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 8 - MAR 14 This Week : MAR 15 - MAR 21 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 79 44 33 65 ---- Normal 81 46 34 74 Recorded 85 46 42 88 0.00 2014 84 43 24 77 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61 MAR 13 ; Min = 51.6 MAR 8 WEATHER UPDATE -------------------------------- --Some shower activity is possible this week as a pair of low pressure systems pass through the area. The first system will pass south of AZ on Monday & Tues- day, resulting in a chance for showers in eastern AZ. A 2nd system will move through the area mid-week, providing a chance for showers Wednesday & Thursday across southern & central AZ. Very warm temperatures Monday will be followed by a slight cooling trend mid-week with a return to warm & dry conditions for the weekend. Temperatures will average above normal this week. --Acceptable germination results when minimum soil temperatures(8am) exceed 60F. Soils approach 60F at 8am when minimum air temperatures(sunrise) remain above 47F. MOHAVE MAR 29, 2015 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************************ | **************** 715 *************** | ************************************ | | ^ 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 28 v = Heat Units accumulated from JAN 1 - MAR 21 HEAT UNITS -------------------------------- HUs are running about 17 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 22 - MAR 28 This Week : MAR 29 - APR 4 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 80 46 33 72 ---- Normal 82 48 33 79 Recorded 87 49 40 96 0.00 2014 79 45 29 64 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61 MAR 22 ; Min = 56.8 MAR 24 WEATHER UPDATE -------------------------------- High pressure will dominate AZ weather this week, resulting in sunny & dry conditions with above normal temperatures. Breezy to windy conditions may develop late in the week as a storm system moves north of the state. Long range forecasts issued by the Climate Prediction Center indicate a bias for above normal precipitation for April through September. Temperature forecasts for the same period suggest near normal temperatures for eastern AZ grading to above normal in western AZ. Heat unit based planting windows(see graph) are open for all locations below 4000' Growers in central/western AZ should complete their plantings of full season varieties as soon as practicable to minimize problems with mid-summer heat stress. MOHAVE APR 5, 2015 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | **************************************** | ****************** 809 ***************** | **************************************** | | ^ 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 4 v = Heat Units accumulated from JAN 1 - MAR 28 HEAT UNITS -------------------------------- HUs are running about 17 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 29 - APR 4 This Week : APR 5 - APR 11 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 82 48 33 79 ---- Normal 82 49 32 83 Recorded 88 46 34 94 0.00 2014 95 50 26 115 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 63.3 APR 1 ; Min = 56.8 APR 4 WEATHER UPDATE -------------------------------- --Two storm systems are forecast to impact AZ this week. The first system will move across the Great Basin mid-week, resulting cooler & windy conditions. High pressure will redevelop late in the week, producing a brief warming trend prior to the arrival of the 2nd system this weekend. The 2nd system will move across northern Mexico & may produce some precipitation by Sunday. --Heat unit based planting windows (see graph) are open for all locations due to the warm March weather. A good planting forecast should call for clear & dry weather with highs above 80F & lows of 48F & above. Growers planning to plant this week should monitor the development of the storm systems described above. MOHAVE APR 12, 2015 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ******************************************** | ******************** 877 ******************* | ******************************************** | | ^ 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 11 v = Heat Units accumulated from JAN 1 - APR 4 HEAT UNITS -------------------------------- HUs are running about 15 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 5 - APR 11 This Week : APR 12 - APR 18 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 82 49 32 83 ---- Normal 85 49 32 91 Recorded 81 42 34 70 0.00 2014 91 52 23 117 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 60.6 APR 8 ; Min = 57.7 APR 10 WEATHER UPDATE -------------------------------- --A strong storm system is expected to drop into the into the 4-Corners region by mid-week, producing very windy conditions & much cooler temperatures. No precipitation is expected with this system & current forecasts indicate the coldest days will be Thursday & Friday. This cool spell with be short-lived with a return to normal temperatures by the weekend. --Heat unit based planting windows (see graph) are open for all locations. A good planting forecast calls for clear & dry weather with highs above 80F & lows of 48F & above. Growers planning to plant this week should monitor the development of the mid-week storm system. MOHAVE APR 19, 2015 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************************************ | ********************** 964 ********************* | ************************************************ | | ^ 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 18 v = Heat Units accumulated from JAN 1 - APR 11 HEAT UNITS -------------------------------- HUs are running about 13 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 12 - APR 18 This Week : APR 19 - APR 25 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 85 49 32 91 ---- Normal 88 52 34 104 Recorded 86 45 31 86 0.00 2014 91 54 35 114 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61 APR 14 ; Min = 55.8 APR 16 WEATHER UPDATE -------------------------------- --Expect sunny & warm conditions through mid-week. Another storm system is expected to impact AZ by Wednesday with strong winds, followed by a chance for showers Thursday. Cooler temperatures are expected Thursday & Friday, followed by much warmer temperatures for the weekend. Locations most favored for precipitation with this system are central & northern AZ. --Heat unit based planting windows (see graph) are open for all locations. --Plant population (PP) should range from 25,000-50,000 plants/a. To assess, count the number of plants in 1/1000 a & multiply by 1000. Row length equal to 1/1000 a: 40" row = 13'1", 38" row = 13'9", 36" row = 14'6", 30" row = 17'5". MOHAVE COTTON DEVELOPMENT ADVISORY APR 26, 2015 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/1 ************* 649 +3 days | v | | | | | | | | 3/15********** 511 +1 day | v | | | | | | | | 4/1 ***** 273 -3 days | | | | | | | | | 4/15** 120 -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 25 v = Heat Units on APR 18; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1047; Last year = 1134; Normal = 868 HUs since Jan 1 are running about 10 days ahead of normal. HU last week = 84 HISTORICAL STATISTICS -------------------------------- Last Week : APR 19 - APR 25 This Week : APR 26 - MAY 2 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 88 52 34 104 ---- Normal 92 55 34 119 Recorded 83 49 44 84 0.00 2014 91 54 26 117 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .3" .3" .3" .3" .3" WEATHER UPDATE -------------------------------- --High pressure will develop over AZ this week, resulting in clear & dry condi- tions with light winds & warm temperatures. Temperatures will increase to above normal levels by Tuesday & continue for the remainder of the week. Long range forecasts indicate the development of another storm system by early next week. --Plant population (PP) should range from 25,000-50,000 plants/a. To assess, count the number of plants in 1/1000a & multiply by 1000. Row length equal to 1/1000a: 40" row = 13'1", 38" row = 13'9", 36" row = 14'6", 30" row = 17'5". --Crops in western production areas should be approaching pinhead square, the transition from vegetative to reproductive growth, that occurs at ~700 HUAP. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 3, 2015 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v| | | | | | | | 3/1 *************** 764 +2 days | v | | | | | | | | 3/15************* 626 +1 day | v | | | | | | | | 4/1 ******** 388 -2 days |v | | | | | | | | 4/15***** 235 -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 2 v = Heat Units on APR 25; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1162; Last year = 1251; Normal = 987 HUs since Jan 1 are running about 10 days ahead of normal. HU last week = 114 HISTORICAL STATISTICS -------------------------------- Last Week : APR 26 - MAY 2 This Week : MAY 3 - MAY 9 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 92 55 34 119 ---- Normal 93 57 35 127 Recorded 94 52 42 114 0.00 2014 91 55 23 123 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .47" .43" .43" .43" .43" WEATHER UPDATE -------------------------------- --Two storm systems will impact AZ this week. The 1st system will pass through the state Monday, bringing cooler temperatures & a chance for scattered thunder- storms. The 2nd system will drop into the Great Basin on Wednesday, resulting in windy conditions & a continuation of cool temperatures. No precipitation is ex- pected with the 2nd system. Temperatures should average ~3 degrees below normal. --Crops in western production areas should be approaching pinhead square (PHS), the transition from vegetative to reproductive growth that occurs at ~700 HUAP. The optimal time for N fertilizer applications is between PHS & peak bloom. See http://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az1243.pdf MOHAVE COTTON DEVELOPMENT ADVISORY MAY 17, 2015 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | v| | | | | | | 3/1 ******************* 967 -1 day | |v | | | | | | | 3/15***************** 829 -2 days | v | | | | | | | | 4/1 ************ 591 -5 days | v | | | | | | | | 4/15********* 438 -4 days |v | | | | | | | | 5/1 **** 222 -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 16 v = Heat Units on MAY 9; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1365; Last year = 1508; Normal = 1251 HUs since Jan 1 are running about 5 days ahead of normal. HU last week = 99 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 10 - MAY 16 This Week : MAY 17 - MAY 23 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 97 58 37 137 ---- Normal 97 60 39 145 Recorded 87 51 39 99 0.00 2014 93 61 27 141 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .73" .55" .41" .41" .41" WEATHER UPDATE -------------------------------- --Several late spring storms are expected to move across the Great Basin this week, resulting in another week of variable weather. Generally warm weather on Monday will be followed by a brief cool spell Tuesday followed by a 2nd period of warming mid-week. A 3rd storm system will pass north of the area late in the week, generating another period of below normal temperatures for the weekend. Little or no precipitation is expected with this unsettled weather, but periods of breezy/windy conditions are expected as these systems move north of the area. Temperatures should average 3-5 degrees below normal for the week. Longer term forecasts indicate the current cool pattern may last until Memorial Day weekend. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 24, 2015 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | |v | | | | | | 3/1 ********************** 1079 -3 days | | v| | | | | | | 3/15******************* 941 -4 days | v | | | | | | | | 4/1 ************** 703 -7 days | v | | | | | | | | 4/15*********** 550 -6 days | v | | | | | | | | 5/1 ******* 334 -5 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 23 v = Heat Units on MAY 16; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1477; Last year = 1649; Normal = 1396 HUs since Jan 1 are running about 4 days ahead of normal. HU last week = 112 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 17 - MAY 23 This Week : MAY 24 - MAY 30 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 97 60 39 145 ---- Normal 97 60 42 144 Recorded 89 53 41 112 0.03 2014 104 64 46 167 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): .87" .69" .41" .41" .41" WEATHER UPDATE -------------------------------- --Six weeks of below normal temperatures will end this week with the exit of a weak storm system on Monday. High pressure will then develop over AZ, resulting in mostly clear skies, low humidity & much warmer temperatures. Temperatures should reach above normal levels by the weekend. Some precipitation associated with the departing storm system may develop in high elevation areas Monday. Dry conditions are expected statewide after Monday. --The cool, wet May has improved water supply forecasts for the Colorado River. The Colorado Basin River Forecast Center now projects April to July flow at ~5 million acre feet (AF), an increase of ~2 million AF over the 1 May forecast. MOHAVE COTTON DEVELOPMENT ADVISORY MAY 31, 2015 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v | | | | | | 3/1 ************************* 1226 -3 days | | |v | | | | | | 3/15********************** 1088 -4 days | v | | | | | | | 4/1 ***************** 850 -6 days | v | | | | | | | | 4/15************** 697 -5 days | v | | | | | | | | 5/1 ********** 481 -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 30 v = Heat Units on MAY 23; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1624; Last year = 1816; Normal = 1539 HUs since Jan 1 are running about 4 days ahead of normal. HU last week = 148 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 24 - MAY 30 This Week : MAY 31 - JUN 6 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 97 60 42 144 ---- Normal 101 63 43 158 Recorded 100 60 38 148 0.00 2014 106 57 40 147 ESTIMATED WATER USE -------------------------------- Planting date : 3/1 3/15 4/1 4/15 5/1 Water Use (last week): 1.22" 1.01" .64" .48" .48" WEATHER UPDATE -------------------------------- --Strong high pressure will produce hot & dry conditions through mid-week. The only exception may be eastern AZ where there is a slight chance for high eleva- tion showers Monday. High pressure will weaken late in the week as a trough of low pressure approaches from the west. Slightly cooler conditions are expected with this system & longer term forecasts suggest a slight chance for showers as this trough impacts the region. --Nitrogen (N) should be applied between pinhead square & peak bloom. Split ap- plications are recommended to improve N use efficiency. See publication at http://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az1243.pdf