MARICOPA MAR 4, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | *************** | ****** 309 **** | *************** | | ^ 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 25 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 6 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : FEB 26 - MAR 3 This Week : MAR 4 - MAR 10 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 72 42 32 43 ---- Normal 75 43 32 54 Recorded 71 38 25 35 0.00 2011 81 43 24 68 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 56.3 FEB 27 ; Min = 50.7 MAR 3 WEATHER UPDATE -------------------------------- --Expect sunny & very warm conditions through Tuesday. Strong winds will develop Tuesday as a dry storm system moves across northern AZ. Much cooler temperatures are expected mid-week with the passage of this storm. A gradual warming trend will develop late in the week with a return to normal temperatures by the week- end. No precipitation is forecast for this week. --Planting windows are open in Yuma County. Windows open when annual heat unit accumulation (AHU) exceeds 400 & close when AHU exceeds 700, 800 or 1000 depend- ing on maturity group. Soil temperatures & the forecast should monitored before planting. Minimum soil temperatures (~8am) should exceed 60F prior to planting. Such conditions typically result when minimum air temperatures remain above 47F. MARICOPA MAR 11, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ****************** | ******* 356 ****** | ****************** | | ^ 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 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 5 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 75 43 32 54 ---- Normal 78 44 32 62 Recorded 75 39 23 47 0.00 2011 86 46 29 91 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 58.3 MAR 7 ; Min = 51.6 MAR 4 WEATHER UPDATE -------------------------------- --Sunny & warm with light winds through Thursday. Winds should increase Friday in advance of a Pacific storm system that may produce rainfall over the weekend. Cooler weather is expected this weekend & early next week following the passage of this storm. --Planting windows open when annual heat unit accumulation (AHU) exceeds 400 & close when AHU exceeds 700, 800 or 1000 depending on maturity group (see graph). Monitor soil temperatures & the weather forecast before planting. Minimum soil temperatures (occur~8am) should exceed 60F prior to planting. Soil temperatures generally approach this 60F level at 8am when minimum air temperatures (at sun- rise) remain above 47F. MARICOPA MAR 18, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ********************** | ********* 430 ******** | ********************** | | ^ 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 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 5 days 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 78 44 32 62 ---- Normal 79 46 32 70 Recorded 83 41 24 75 0.00 2011 72 43 28 42 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61.2 MAR 17 ; Min = 55.2 MAR 11 WEATHER UPDATE -------------------------------- --The weekend storm will remain in place through Monday, producing cold & damp weather across AZ. High pressure moves in beginning Tuesday, resulting in clear skies & a rapid warming trend. Above normal temperatures will return by Thursday & continue through the coming weekend. --Planting windows open when annual heat unit accumulation (AHU) exceeds 400 & close when AHU exceeds 700, 800 or 1000 depending on maturity group (see graph). Monitor soil temperatures & the weather forecast before planting. Minimum soil temperatures occur ~8am & should exceed 60F prior to planting. Soil temperatures approach 60F at 8am when minimum air temperatures (at sunrise) remain above 47F. If planting this week, give the soils adequate time to rewarm to proper levels. MARICOPA MAR 25, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ************************ | ********** 479 ********* | ************************ | | ^ 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 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 4 days ahead of 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 79 46 32 70 ---- Normal 78 47 32 68 Recorded 74 40 35 49 0.25 2011 88 50 32 100 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61.9 MAR 24 ; Min = 49.3 MAR 20 WEATHER UPDATE -------------------------------- --Expect cooler temperatures Monday as a weakening storm system passes north of AZ. No precipitation is expected with this system. Sunny, warm & dry conditions will return by mid-week & continue through the weekend. Longer term, forecast models indicate the possibility of another cold storm system early next week. --Planting windows are open in central & western AZ (see graph). Growers in Yuma Co. should complete their plantings of full season varieties as soon as possible & before HU accumulation exceeds 700. Monitor soil temperatures and the weather forecast before planting. Minimum soil temperatures occur ~8am & should exceed 60F prior to planting. Soil temperatures approach 60F at 8am when minimum air temperatures (at sunrise) remain above 47F. MARICOPA APR 1, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | **************************** | ************ 570 *********** | **************************** | | ^ 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 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 6 days ahead of 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 78 47 32 68 ---- Normal 82 49 33 82 Recorded 85 49 35 91 0.00 2011 79 52 31 83 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 63.1 MAR 25 ; Min = 59.7 MAR 30 WEATHER UPDATE -------------------------------- --A dry storm system will exit AZ Monday, resultng in a cool day with moderate winds. Mild & dry conditions return by mid-week as high pressure redevelops over AZ. Windy & slightly cooler temperatures are expected this weekend as a trough of low pressure develops over the West. This next system is expected to be dry, but growers should monitor this system closely if planning to plant this week. --Planting windows are open in central & western AZ (see graph). Growers should complete their plantings of full season varieties before HU accumulation exceeds 700. 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". MARICOPA APR 8, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ******************************** | ************** 644 ************* | ******************************** | | ^ 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 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 5 days 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 82 49 33 82 ---- Normal 84 49 30 90 Recorded 80 47 23 76 0.00 2011 82 46 31 79 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 63.7 APR 6 ; Min = 58.8 APR 3 WEATHER UPDATE -------------------------------- --Sunny, warm & dry through mid-week. Unsettled & cooler weather is forecast to develop by Thursday & continue through the weekend. A cold & potentially wet storm system will drop into AZ this weekend. Present forecasts indicate rainfall is more likely in northern production areas. --Monitor soil temperatures & the weather forecast before planting. 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. --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 equal to 1/1000a: 40"row = 13'1", 38"row = 13'9", 36"row = 14'6", 30"row = 17'5". MARICOPA APR 15, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ************************************ | **************** 728 *************** | ************************************ | | ^ 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 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 4 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 84 49 30 90 ---- Normal 86 51 31 98 Recorded 82 52 29 85 0.01 2011 90 57 33 129 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 68.7 APR 11 ; Min = 62.8 APR 8 WEATHER UPDATE -------------------------------- --High pressure will develop over AZ this week, resulting in above normal temp- eratures by Tuesday. Expect sunny, warm & dry conditions with light winds. Day- time temperatures in central & western AZ should reach the 90s by mid-week. --Monitor soil temperatures before planting. Minimum soil temperatures (at~8am) should exceed 60F prior to planting. Soils approach 60F at 8am when minimum air temperatures (at sunrise) exceed 47F. Central AZ growers should finish planting full season varieties as soon as possible as HU accumulation is now approaching 700 (see graph). 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". MARICOPA APR 22, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ****************************************** | ******************* 834 ****************** | ****************************************** | | ^ 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 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 4 days 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 86 51 31 98 ---- Normal 88 54 31 110 Recorded 91 50 32 105 0.00 2011 86 59 28 120 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 69.6 APR 19 ; Min = 61.9 APR 15 WEATHER UPDATE -------------------------------- --Sunny & hot weather will continue through Wednesday. A trough of low pressure will move into the area late Wednesday & Thursday, resulting in clouds, cooler temperatures & a slight chance for rain. The cooler weather will be short-lived as sunny & warmer conditions will return by the weekend. --Growers in central & western AZ should finish planting as soon as possible as HU accumulation is approaching the end of the planting window (see graph). Avoid late planting if possible. Long range forecasts indicate a strong bias for above normal temperatures during monsoon. Plant population should range from 25,000- 50,000 plants/a. To assess, count 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". MARICOPA APR 29, 2012 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ************************************************ | ********************** 970 ********************* | ************************************************ | | ^ 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 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 5 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 88 54 31 110 ---- Normal 91 56 30 120 Recorded 92 60 37 137 0.06 2011 91 54 16 116 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 72.5 APR 25 ; Min = 64.2 APR 28 WEATHER UPDATE -------------------------------- --High pressure will dominate AZ weather this week, producing clear skies, warm temperatures & low humidity. Temperatures should average ~2 degrees above normal. --Central AZ: Finish planting as soon as possible. HU accumulation is approaching the end of the planting window (see graph). Avoid late crops: summer forecasts indicate a strong bias for above normal temperatures during the monsoon season. --Western AZ: 1st fruiting branches (pinhead square,PHS) typically form at nodes 5-7 at ~700 HUs after planting. N fertilizer should be applied between PHS & peak bloom. For more details go to: http://cals.arizona.edu/pubs/crops/az1200.pdf. --Eastern AZ: Plant population should range from 25,000-50,000 plants/a. MARICOPA COTTON DEVELOPMENT ADVISORY MAY 6, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/15************** 717 +5 days | v | | | | | | | | 4/1 *********** 542 +4 days | v | | | | | | | | 4/15******** 384 +4 days | | | | | | | | | 5/1 ** 101 +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 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 = 1113; Last year = 1075; Normal = 1032 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 144 HISTORICAL STATISTICS -------------------------------- Last Week : APR 29 - MAY 5 This Week : MAY 6 - MAY 12 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 91 56 30 120 ---- Normal 94 59 32 134 Recorded 94 60 35 144 0.00 2011 88 57 29 117 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): .44" .44" .44" .44" WEATHER UPDATE -------------------------------- --A low pressure system will move into AZ Monday & exit the state by Wednesday. This system will bring cooler & windy conditions early in the week, & is expect- ed to pull moisture into eastern AZ resulting in partly cloudy conditions with a chance for scattered showers on Tuesday & Wednesday in Graham & Cochise Co. Very hot conditions are expected to develop across AZ by the latter half of the week. --This is the 1st week of Cotton Development Advisories in central & eastern AZ. The 1st development stage of interest is pinhead square (PHS) which marks the transition from vegetative to reproductive growth. 1st fruiting branches should develop at nodes 5-7 at ~700 HUs after planting. N fertilizer should be applied between PHS & peak bloom. Details @ www.cals.arizona.edu/pubs/crops/az1200.pdf. MARICOPA COTTON DEVELOPMENT ADVISORY MAY 13, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | 3/15***************** 854 +4 days | v | | | | | | | | 4/1 ************** 679 +3 days | v | | | | | | | | 4/15********** 521 +4 days |v | | | | | | | | 5/1 ***** 238 +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 12 v = Heat Units on MAY 5; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1250; Last year = 1192; Normal = 1166 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 136 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 6 - MAY 12 This Week : MAY 13 - MAY 19 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 94 59 32 134 ---- Normal 96 61 34 146 Recorded 94 58 31 136 0.10 2011 84 57 33 112 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): .62" .45" .45" .45" WEATHER UPDATE -------------------------------- --High pressure will control AZ weather this week. Expect sunny, hot & dry weather with low-moderate winds. Temperatures should average ~3F above normal. --1st post-plant irrigations (PPI) are typically applied at 800-1000 HUs after planting. Soil type plays a role in this decision with earlier PPIs in coarse textured soils & later PPIs in fine textured soils. More details are available at www.cals.arizona.edu/pubs/crops/az1204.pdf. --The 1st development stage of interest is pinhead square (PHS) which marks the transition from vegetative to reproductive growth. 1st fruiting branches should develop at nodes 5-7 at ~700 HUs after planting. N fertilizer should be applied between PHS & peak bloom. Details @ www.cals.arizona.edu/pubs/crops/az1200.pdf. MARICOPA COTTON DEVELOPMENT ADVISORY MAY 20, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | v| | | | | | | 3/15******************** 1014 +5 days | v | | | | | | | 4/1 ***************** 839 +4 days | v | | | | | | | | 4/15************** 681 +4 days | v | | | | | | | | 5/1 ******** 398 +3 days | | | | | | | | | 5/15** 116 +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 19 v = Heat Units on MAY 12; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1410; Last year = 1304; Normal = 1312 HUs since Jan 1 are running about 4 days ahead of normal. HU last week = 161 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 13 - MAY 19 This Week : MAY 20 - MAY 26 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 96 61 34 146 ---- Normal 95 61 35 145 Recorded 101 63 30 161 0.00 2011 95 61 27 147 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): .95" .66" .51" .51" .51" WEATHER UPDATE -------------------------------- --High pressure will dominate AZ weather early this week, producing near record heat on Monday & Tuesday. A series of storm systems are forecast to move across the Great Basin later in the week, resulting in windy & cooler (near normal) conditions. No precipitation is expected with these storm systems. -- Growers should closely monitor soil moisture & avoid crop water stress. First post-plant irrigations (PPI) are typically applied at 800-1000 HUs after planting with earlier PPIs in coarse textured soils & later PPIs in finer textured soils. High rates of evaporative demand (ED) can also result in earlier PPIs. Last week's hot & dry weather produced high rates of ED. High ED is expected again this week. More details on PPIs are available at www.cals.arizona.edu/pubs/crops/az1204.pdf. MARICOPA COTTON DEVELOPMENT ADVISORY JUN 3, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v| | | | | | 3/15************************** 1321 +4 days | | | v | | | | | | 4/1 *********************** 1146 +4 days | | v| | | | | | | 4/15******************** 988 +4 days | v | | | | | | | | 5/1 ************** 705 +2 days | v | | | | | | | | 5/15******** 423 +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 2 v = Heat Units on MAY 26; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1717; Last year = 1584; Normal = 1614 HUs since Jan 1 are running about 5 days ahead of normal. HU last week = 150 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 27 - JUN 2 This Week : JUN 3 - JUN 9 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 99 63 34 157 ---- Normal 100 65 35 162 Recorded 101 61 28 150 0.00 2011 99 64 25 160 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.37" 1.1" .86" .48" .48" WEATHER UPDATE -------------------------------- --High pressure will remain in place, resulting in clear, dry & seasonably hot weather this week. Expect hot days & mild nights with light to moderate winds. --First fruiting branches (pinhead square,PHS) typically form at nodes 5-7 at ~700 HUs after planting (HUAP). First flowers will develop from these early PHS at ~1200 HU with peak bloom (PB) following at ~2000 HUAP. N fertlizer should be applied between PHS & PB. Details @ www.cals.arizona.edu/pubs/crops/az1200.pdf. --The hot & dry June weather is optimal for cotton development in AZ. Growers should monitor crop water status & avoid stresses (e.g., water, pests) that can result in square loss. Poor early season fruit set lengthens the primary bloom period, making the crop more vulnerable to heat stress during the monsoon. MARICOPA COTTON DEVELOPMENT ADVISORY JUN 10, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v | | | | | 3/15****************************** 1487 +4 days | | | v| | | | | | 4/1 ************************** 1312 +4 days | | | v | | | | | | 4/15*********************** 1154 +4 days | v | | | | | | | 5/1 ***************** 871 +3 days | v | | | | | | | | 5/15************ 589 +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 9 v = Heat Units on JUN 2; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1883; Last year = 1744; Normal = 1776 HUs since Jan 1 are running about 5 days ahead of normal. HU last week = 165 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 3 - JUN 9 This Week : JUN 10 - JUN 16 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 100 65 35 162 ---- Normal 103 66 36 170 Recorded 102 65 34 165 0.00 2011 104 68 30 175 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.79" 1.49" 1.22" .74" .53" WEATHER UPDATE -------------------------------- --Sunny & dry weather will continue this week with temperatures running slightly above normal through Wednesday. Some cooling is expected later in the week as a trough of low pressure develops over the western state. --Hot & dry June weather is optimal for cotton development. Growers should avoid stresses that can result in square loss. Poor early season fruit set lengthens primary bloom, making the crop more vulnerable to heat stress during the monsoon. --N fertlizer should be applied between pinhead square & peak bloom (700-1200 HUs after planting. For more details go to www.cals.arizona.edu/pubs/crops/az1200.pdf. --The Climate Prediction Center has issued an El Nino watch. El Nino conditions may develop by late summer. El Nino is associated with wet winters in AZ. MARICOPA COTTON DEVELOPMENT ADVISORY JUN 17, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v| | | | | 3/15********************************* 1662 +4 days | | | | v | | | | | 4/1 ****************************** 1487 +4 days | | | v| | | | | | 4/15*************************** 1329 +4 days | | v| | | | | | | 5/1 ********************* 1046 +3 days | v | | | | | | | | 5/15*************** 764 +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 16 v = Heat Units on JUN 9; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2058; Last year = 1919; Normal = 1947 HUs since Jan 1 are running about 5 days ahead of normal. HU last week = 174 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 10 - JUN 16 This Week : JUN 17 - JUN 23 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 66 36 170 ---- Normal 106 69 40 181 Recorded 104 68 34 174 0.00 2011 106 70 34 185 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.09" 1.79" 1.52" 1.04" .56" WEATHER UPDATE -------------------------------- --Humidity surged into eastern & south central AZ Saturday, producing afternoon clouds & thunderstorms. This moisture was replaced by hot & very dry conditions Sunday which are expected to continue statewide through late this week. Moisture is again expected to leak into eastern & south central AZ this weekend as high pressure shifts east & low pressure develops off the west coast. Temperatures should average about 5 degrees above normal for the week. --Hot & dry June weather is optimal for cotton development. Avoid stresses that can result in square loss & poor early season fruit set which lengthens primary bloom & makes the crop more vulnerable to heat stress during monsoon. The monsoon appears to be developing early this year! MARICOPA COTTON DEVELOPMENT ADVISORY JUN 24, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/15************************************* 1851 +4 days | | | | v| | | | | 4/1 ********************************** 1676 +4 days | | | | v | | | | | 4/15****************************** 1518 +5 days | | | v | | | | | | 5/1 ************************* 1235 +3 days | |v | | | | | | | 5/15******************* 953 +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 23 v = Heat Units on JUN 16; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2247; Last year = 2104; Normal = 2127 HUs since Jan 1 are running about 5 days ahead of normal. HU last week = 189 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 17 - JUN 23 This Week : JUN 24 - JUN 30 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 106 69 40 181 ---- Normal 107 72 44 189 Recorded 108 72 37 189 0.00 2011 111 73 41 195 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.56" 2.25" 1.96" 1.44" .93" HEAT STRESS LEVELS -------------------------------- Date 6/17 6/18 6/19 6/20 6/21 6/22 6/23 Stress ns L1 ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --The humid weather that entered central & eastern AZ this past weekend will generate scattered afternoon & evening thunderstorms through Tuesday. Western production areas should remain dry. High pressure will redevelop over AZ Wed- nesday, bringing a return to very hot & dry weather statewide. Hot & dry con- ditions are expected to continue through the coming weekend. --The Climate Prediction Center (CPC) has issued an El Nino Watch. CPC expects El Nino (EN) conditions to redevelop late this summer. Often when EN develops in late summer, above normal precipitation results during the subsequent winter. --Heat stress (HS) values are provided above. No serious HS was recorded last week. See http://ag.arizona.edu/azmet/cotton.htm#HEATSTRESS for more details. MARICOPA COTTON DEVELOPMENT ADVISORY JUL 1, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/15***************************************** 2059 +5 days | | | | | v | | | | 4/1 ************************************** 1884 +5 days | | | | v| | | | | 4/15*********************************** 1726 +5 days | | | |v | | | | | 5/1 ***************************** 1443 +4 days | | |v | | | | | | 5/15*********************** 1161 +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 30 v = Heat Units on JUN 23; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2455; Last year = 2299; Normal = 2316 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 207 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 24 - JUN 30 This Week : JUL 1 - JUL 7 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 107 72 44 189 ---- Normal 105 74 51 193 Recorded 108 80 52 207 0.00 2011 106 77 59 201 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.84" 2.53" 2.26" 1.76" 1.26" HEAT STRESS LEVELS -------------------------------- Date 6/24 6/25 6/26 6/27 6/28 6/29 6/30 Stress L1 L1 L2 L1 L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --Moisture will enter AZ this week as a tropical easterly wave moves across N. Mexico. Moisture will enter southeast & south central AZ Monday & the remaining areas Tuesday. Expect more cloudiness & slightly cooler temperatures with this moisture. Precipitation, some heavy, is expected in southeast & south central AZ. Only isolated thunderstorms are forecast for central/western AZ. Humidity will remain in place in southeast & south central AZ throughout the week with drier air forecast to return to western AZ by the weekend. --Some L1 heat stress (HS) was reported last week (see above). HS results when high temperatures combine with elevated humidity to increase crop temperatures. See http://ag.arizona.edu/azmet/cotton.htm#HEATSTRESS for more details. MARICOPA COTTON DEVELOPMENT ADVISORY JUL 8, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | 3/15********************************************* 2253 +5 days | | | | | v | | | | 4/1 ****************************************** 2078 +5 days | | | | | v | | | | 4/15************************************** 1920 +5 days | | | | v | | | | | 5/1 ********************************* 1637 +4 days | | | v| | | | | | 5/15*************************** 1355 +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 JUL 7 v = Heat Units on JUN 30; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2649; Last year = 2500; Normal = 2509 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 194 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 1 - JUL 7 This Week : JUL 8 - JUL 14 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 74 51 193 ---- Normal 105 75 54 194 Recorded 101 75 53 194 0.29 2011 102 72 50 183 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.38" 2.38" 2.19" 1.77" 1.35" HEAT STRESS LEVELS -------------------------------- Date 7/1 7/2 7/3 7/4 7/5 7/6 7/7 Stress L1 L1 L1 ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --Hot & relatively dry air will remain in place through mid-week. Temperatures in excess of 110F are expected in central & western production areas. A cooler, easterly flow regime will pull in more moisture by mid-week. Expect cooler temp- eratures, higher humidity and improved chances for afternoon & evening thunder- storms in all production areas during the latter half of the week. --Heat stress (HS) results when high temperatures combine with elevated humidity to increase crop temperatures. The cool temperatures that arrived with last week's surge of monsoon moisture prevented the development of serious HS. This week's forecast for high temperatures & increased humidity may produce the first serious HS for 2012. Details at http://ag.arizona.edu/azmet/cotton.htm#HEATSTRESS MARICOPA COTTON DEVELOPMENT ADVISORY JUL 15, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/15************************************************* 2454 +5 days | | | | | |v | | | 4/1 ********************************************** 2279 +5 days | | | | | v | | | | 4/15****************************************** 2121 +5 days | | | | | v | | | | 5/1 ************************************* 1838 +4 days | | | | v | | | | | 5/15******************************* 1556 +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 JUL 14 v = Heat Units on JUL 7; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2850; Last year = 2683; Normal = 2704 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 201 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 8 - JUL 14 This Week : JUL 15 - JUL 21 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 75 54 194 ---- Normal 105 76 57 198 Recorded 104 78 62 201 0.55 2011 108 79 51 207 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.37" 2.37" 2.37" 2.05" 1.64" HEAT STRESS LEVELS -------------------------------- Date 7/8 7/9 7/10 7/11 7/12 7/13 7/14 Stress L1 L2 L2 L2 ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --A drier southwesterly flow will develop this week, resulting in lower humidity & higher temperatures by mid-week. The mid-week warming will bring temperatures back near normal for mid-July. The best chances for precipitation will be early in the week in southeast AZ. Another tropical system is expected to impact the state by the weekend, bringing a return to higher humidity & increased chances for precipitation. --Heat stress (HS) continues to run well below normal for mid-July & this week's forecast calling for drier conditions should produce minimal HS this week. For more information on HS go to http://ag.arizona.edu/azmet/cotton.htm#HEATSTRESS MARICOPA COTTON DEVELOPMENT ADVISORY JUL 22, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/15***************************************************** 2651 +5 days | | | | | | v | | | 4/1 ************************************************** 2476 +5 days | | | | | |v | | | 4/15********************************************** 2318 +5 days | | | | | v | | | | 5/1 ***************************************** 2035 +4 days | | | | v | | | | 5/15*********************************** 1753 +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 JUL 21 v = Heat Units on JUL 14; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3047; Last year = 2890; Normal = 2902 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 197 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 15 - JUL 21 This Week : JUL 22 - JUL 28 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 76 57 198 ---- Normal 104 75 59 195 Recorded 103 76 56 197 0.02 2011 104 77 59 201 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.5" 2.5" 2.5" 2.47" 2.03" HEAT STRESS LEVELS -------------------------------- Date 7/15 7/16 7/17 7/18 7/19 7/20 7/21 Stress ns ns ns ns L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --Warm & humid weather will remain in place through Tuesday, bringing a chance for afternoon/evening thunderstorms. Drier air will enter AZ mid-week, leading to hotter temperatures & reduced chances for precipitation. Moisture will re- turn by the weekend, resulting in cooler temperatures & increased chances for precipitation. Temperatures should average slightly above normal this week. --August Climate Prediction Center forecast shows a bias for above normal pre- cipitation statewide. No bias is indicated for August temperatures. All 90-day forecasts through next spring show a bias for above normal precipitation due to the forecasted development of El Nino late this summer. Above normal winter precipitation often results when El Nino is in place by late summer. MARICOPA COTTON DEVELOPMENT ADVISORY JUL 29, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | 3/15********************************************************* 2856 +6 days | | | | | | v | | | 4/1 ****************************************************** 2681 +5 days | | | | | | v | | | 4/15************************************************** 2523 +6 days | | | | | v | | | 5/1 ********************************************* 2240 +4 days | | | | | v | | | | 5/15*************************************** 1958 +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 JUL 28 v = Heat Units on JUL 21; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3252; Last year = 3091; Normal = 3097 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 205 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 22 - JUL 28 This Week : JUL 29 - AUG 4 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 104 75 59 195 ---- Normal 104 76 60 198 Recorded 104 79 59 205 0.01 2011 108 81 60 208 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.42" 2.42" 2.42" 2.42" 2.27" HEAT STRESS LEVELS -------------------------------- Date 7/22 7/23 7/24 7/25 7/26 7/27 7/28 Stress ns L1 L1 L1 L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --The tropical system that produced heavy weekend rains in southeast & central AZ has moved into western AZ where it will slowly dissipate this week. This system is expected to produce isolated heavy thunderstorms over western pro- duction areas through mid-week. Drier air will enter eastern AZ early in the week then spread into western AZ mid-week. This drier air will greatly reduce the chances for precipitation and allow temperatures to return to normal levels. --Heat stress (HS) continues to run well below normal for this time of year. HS reports are available at: http://ag.arizona.edu/azmet/cotton.htm#HEATSTRESS --Long term forecasts are calling for El Nino to develop late this summer. Above normal winter precipitation often results when El Ninos develop in late summer. MARICOPA COTTON DEVELOPMENT ADVISORY AUG 5, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/15************************************************************* 3053 +5 days | | | | | | |v | | 4/1 ********************************************************** 2878 +5 days | | | | | | v | | | 4/15****************************************************** 2720 +6 days | | | | | | v | | | 5/1 ************************************************* 2437 +4 days | | | | | v | | | | 5/15******************************************* 2155 +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 AUG 4 v = Heat Units on JUL 28; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3449; Last year = 3299; Normal = 3295 HUs since Jan 1 are running about 7 days ahead of normal. HU last week = 197 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 29 - AUG 4 This Week : AUG 5 - AUG 11 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 104 76 60 198 ---- Normal 103 75 60 196 Recorded 103 76 61 197 1.11 2011 102 81 60 209 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.23" 2.23" 2.23" 2.23" 2.23" HEAT STRESS LEVELS -------------------------------- Date 7/29 7/30 7/31 8/1 8/2 8/3 8/4 Stress ns ns ns L1 L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --High pressure is expected to develop over AZ early this week resulting in less humidity & much hotter temperatures. After Monday, precipitation will limited to high elevation areas, mostly in eastern AZ. Temperatures are expected to run 7-9 degrees above normal this week & may generate the first widespread problems with heat stress, even if humidity levels low some. Heat stress reports are available at: http://ag.arizona.edu/azmet/cotton.htm#HEATSTRESS --The Climate Prediction Center is expecting El Nino conditions to develop late this summer. All precipitation forecasts for the coming winter now show a bias for above normal precipitation. A new update on El Nino will be issued this week & will be summarized in next week's advisory. MARICOPA COTTON DEVELOPMENT ADVISORY AUG 12, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/15***************************************************************** 3265 +6 days | | | | | | | v | | 4/1 ************************************************************** 3090 +6 days | | | | | | |v | | 4/15*********************************************************** 2932 +6 days | | | | | | v | | | 5/1 ***************************************************** 2649 +5 days | | | | | | v | | | 5/15*********************************************** 2367 +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 AUG 11 v = Heat Units on AUG 4; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3661; Last year = 3508; Normal = 3490 HUs since Jan 1 are running about 7 days ahead of normal. HU last week = 212 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 5 - AUG 11 This Week : AUG 12 - AUG 18 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 75 60 196 ---- Normal 103 74 59 192 Recorded 110 82 58 212 0.00 2011 106 77 61 203 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.28" 2.53" 2.58" 2.58" 2.58" HEAT STRESS LEVELS -------------------------------- Date 8/5 8/6 8/7 8/8 8/9 8/10 8/11 Stress L1 L2 L2 L2 L2 L2 L2 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --High pressure will remain in place through mid-week, resulting in near record temperatures and widely scattered thunderstorms through Wednesday. A more south- erly flow regime will develop during the last half of the week, producing more humid conditions & a return to normal temperatures for mid-August. Afternoon & evening thunderstorms will be more prevalent with the increased moisture levels. --Last week's heat produced the first extended period of Level 2 (L2) heat stress in central & western AZ. Heat stress impacts squares & flowers, resulting in the abortion of young bolls (~3 days post bloom). Extended periods of L2 stress can produce prolonged periods of low fruit retention. For more details see reports & publications at http://ag.arizona.edu/azmet/cotton.htm#HEATSTRESS MARICOPA COTTON DEVELOPMENT ADVISORY AUG 19, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v 3463 | 3/15********************************************************************* +6 days | | | | | | | v | | 4/1 ****************************************************************** 3288 +6 days | | | | | | | v | | 4/15*************************************************************** 3130 +6 days | | | | | | v | | 5/1 ********************************************************* 2847 +5 days | | | | | | v | | | 5/15*************************************************** 2565 +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 AUG 18 v = Heat Units on AUG 11; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3859; Last year = 3711; Normal = 3683 HUs since Jan 1 are running about 7 days ahead of normal. HU last week = 199 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 12 - AUG 18 This Week : AUG 19 - AUG 25 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 74 59 192 ---- Normal 102 73 59 189 Recorded 102 76 64 199 0.77 2011 109 79 52 208 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.51" 1.7" 1.88" 1.96" 1.96" HEAT STRESS LEVELS -------------------------------- Date 8/12 8/13 8/14 8/15 8/16 8/17 8/18 Stress L2 L2 L2 ns ns ns L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --High pressure Monday will result in mostly dry conditions with near normal temperatures. The favored location for precipitation on Monday will be in south- east AZ. Low pressure will move into AZ on Tuesday, producing cooler temperatures & increased chances for precipitation through Wednesday. Dry,westerly flow will develop Thursday, resulting in lower humidity, warmer temperatures & reduced chances for precipitation through the weekend. --El Nino is expected to be in place by September. At present, forecast models do not expect a strong El Nino, but rather one that peaks in the moderate range. Still, all long range forecasts through next March exhibit above normal bias for precipitation. MARICOPA COTTON DEVELOPMENT ADVISORY AUG 26, 2012 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | | 3655 | 3/15************************************************************************* +7 days | | | | | | | |v 3480 | 4/1 ********************************************************************** +6 days | | | | | | | v | | 4/15****************************************************************** 3322 +7 days | | | | | | | v | | 5/1 ************************************************************* 3039 +5 days | | | | | | v | | | 5/15******************************************************* 2757 +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 AUG 25 v = Heat Units on AUG 18; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 4051; Last year = 3919; Normal = 3872 HUs since Jan 1 are running about 7 days ahead of normal. HU last week = 193 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 19 - AUG 25 This Week : AUG 26 - SEP 1 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 102 73 59 189 ---- Normal 102 73 58 187 Recorded 99 75 69 194 0.89 2011 108 79 55 206 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.28" 1.47" 1.64" 1.93" 1.93" HEAT STRESS LEVELS -------------------------------- Date 8/19 8/20 8/21 8/22 8/23 8/24 8/25 Stress L2 L1 L1 ns ns L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- --High pressure over southwest Colorado will bring easterly flow to AZ this week. Expect hot temperatures, moderate humidity & a chance for afternoon & evening thunderstorms both early & late in the week. Drier air will enter AZ mid-week & lower the chances for precipitation except near Yuma where a weak distubance may trigger thunderstorms. A second disturbance is forecast to impact AZ late in the week & may produce more widespread precipitation in central & eastern AZ. This is the final cotton advisory for the 2012 season. Have a safe & profitable harvest season!!