HARQUAHALA APR 13, 2008 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ******************************* | ************** 613 ************ | ******************************* | | ^ 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 13 v = Heat Units accumulated from JAN 1 - APR 6 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 7 - APR 13 This Week : APR 13 - APR 20 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 79 44 28 68 ---- Normal 86 46 28 89 Recorded 82 49 26 80 0.00 2007 86 48 30 93 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.2 APR 7 ; Min = 62.1 APR 11 WEATHER UPDATE -------------------------------- High pressure will generate sunny & very warm temperatures Monday & Tuesday. Windy weather is expected to develop on Tuesday & Wednesday as a storm system moves across the Great Basin. This system is expected to be dry, but will produce much cooler temperatures mid-week. High pressure will redevelop for the weekend, bringing a return to warm & dry conditions. Heat unit(HU) accumulation exceeds 600 in most central & western production areas. Growers should be completing their plantings of full season varieties at this time. Medium or short season varieties are recommended once HU accumulation exceeds 700 (see graph above). HARQUAHALA APR 20, 2008 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ************************************ | **************** 710 *************** | ************************************ | | ^ 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 20 v = Heat Units accumulated from JAN 1 - APR 13 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 2 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 14 - APR 20 This Week : APR 20 - APR 27 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 86 46 28 89 ---- Normal 89 50 33 102 Recorded 87 48 21 96 0.00 2007 84 46 25 86 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 68.4 APR 15 ; Min = 63.1 APR 18 WEATHER UPDATE -------------------------------- Dry, westerly flow will prevail over AZ this week, bringing clear skies with above normal temperatures. A series of storm systems will pass north of AZ, producing breezy afternoons, but no chance for precipitation nor significant cooling. Strong high pressure is forecast to develop over the state late in the week & could produce the first 100-degree heat for the low deserts. Heat unit(HU) accumulation exceeds 700 in most central & western production areas. Medium or short season varieties are recommended once HU accumulation exceeds 700 (see graph above). The Climate Prediction Center's long range forecast for this summer shows a strong bias toward above normal temperatures. If this forecast become reality and we have a typical monsoon, summer heat stress could be a problem. The best defense against heat stress is early, optimal planting dates. HARQUAHALA APR 27, 2008 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | 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 27 v = Heat Units accumulated from JAN 1 - APR 20 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 21 - APR 27 This Week : APR 27 - MAY 4 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 89 50 33 102 ---- Normal 90 51 30 107 Recorded 87 50 24 98 0.00 2007 84 48 35 84 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 68 APR 26 ; Min = 65.1 APR 22 WEATHER UPDATE -------------------------------- Clear & dry weather is on tap for AZ this week. Expect windy & warm conditions Monday followed by less wind and even warmer temperatures mid-week. A storm system will pass north of the state Wednesday, bringing another bout of winds & cooler temperatures on Thursday. Sunny & warm weather is expected to return for the weekend. The Climate Prediction Center's long range forecast shows a strong bias toward above normal temperatures this summer. If this forecast becomes reality and we have a typical monsoon, summer heat stress could be a problem. Early, optimal planting dates are the best defense against heat stress. HARQUAHALA MAY 4, 2008 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ********************************************** | ********************* 911 ******************** | ********************************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAY 4 v = Heat Units accumulated from JAN 1 - APR 27 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 28 - MAY 4 This Week : MAY 4 - MAY 11 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 90 51 30 107 ---- Normal 94 55 35 124 Recorded 89 49 24 101 0.00 2007 91 54 34 117 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 70.7 APR 30 ; Min = 66 MAY 3 WEATHER UPDATE -------------------------------- A strong storm system will impact AZ weather early this week. This system will move northeast from northern Baja on Monday & Tuesday, producing strong winds & a chance for isolated thunderstorms across central and southeast AZ. A brief period of cooling will develop with the passage of this storm before high pressure rebuilds over the region and brings a return to warm & dry conditions. Expect temperatures and evaporative demand to run above normal this week. Evaporative demand has been running above normal for several weeks due to the extremely dry & windy conditions. We have entered the prime production period for AZ cotton & water stress should be avoided to maintain earliness and plant vigor. The first post-plant irrigation is typically applied when cotton reaches pinhead square which occurs about 700 heat units (HU) after planting. A typical HU range for this irrigation ranges from 600 (coarse textured soils) to 800 (fine texture soils). Growers are encourage to monitor soil moisture as the recent dry conditions may require an earlier first irrigation date this year. HARQUAHALA MAY 11, 2008 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | *************************************************** | *********************** 1018 ********************** | *************************************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAY 10 v = Heat Units accumulated from JAN 1 - MAY 3 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAY 4 - MAY 10 This Week : MAY 11 - MAY 17 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 93 55 35 123 ---- Normal 94 56 35 127 Recorded 88 52 35 108 0.00 2007 97 59 38 142 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 72.3 MAY 9 ; Min = 69.3 MAY 4 WEATHER UPDATE -------------------------------- A rare, late spring storm system will move southeast across AZ on Monday & Tuesday, producing unsettled weather for the first half of the week. Expect windy & warm conditions Monday, followed by windy & much cooler conditions Tuesday. This system is rather cold & may generate a few scattered thunder- storms on Tuesday, but widespread precipitation is unlikely. High pressure will redevelop over the region on Wednesday, bringing a return to sunny & warm conditions for the latter half of the week. Evaporative demand has been running above normal for several weeks due to the extremely dry & windy conditions. We have entered the prime production period for AZ cotton & water stress should be avoided to maintain earliness and plant vigor. The first post-plant irrigation is typically applied when cotton reaches pinhead square which occurs about 700 heat units (HU) after planting. A typical HU range for this irrigation ranges from 600 (coarse textured soils) to 800 (fine texture soils). Growers are encouraged to monitor soil moisture as the recent dry conditions may require an earlier first irrigation date this year. HARQUAHALA COTTON DEVELOPMENT ADVISORY MAY 18, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | 3/15**************** 823 +1 day | v | | | | | | | | 4/1 ************* 646 0 days | v | | | | | | | | 4/15********* 472 -2 days | v | | | | | | | | 5/1 ***** 250 -2 days | | | | | | | | | 5/15 42 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 MAY 17 v = Heat Units on MAY 10; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1136; Last year = 1282 HUs since Jan 1 are running about 1 day behind normal. HU last week = 117 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 11 - MAY 17 This Week : MAY 18 - MAY 24 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 94 56 35 127 ---- Normal 94 58 39 134 Recorded 90 55 39 117 0.00 2007 91 57 42 125 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 35% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): .59" .45" .45" .45" .45" HEAT STRESS LEVELS -------------------------------- Date 5/11 5/12 5/13 5/14 5/15 5/16 5/17 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 dominate AZ weather during the first half of the week, producing daytime temperatures that will approach record levels. This hot & dry weather will dissipate later in the week when an unusually strong late spring storm system moves into the region. Expect very windy conditions on Wednesday & Thursday with the approach of this system. Temperatures are expected to cool to below normal levels by late in the week and this system may produce a few widely scattered thunderstorms in high elevation production areas. Current forecasts indicate the storm may be slow to exit the state & thus may impact weather during the coming holiday weekend. HARQUAHALA COTTON DEVELOPMENT ADVISORY MAY 25, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | v | | | | | | | 3/15******************* 932 0 days | v| | | | | | | | 4/1 *************** 755 -1 day | v | | | | | | | | 4/15************ 581 -4 days | v | | | | | | | | 5/1 ******* 359 -3 days | | | | | | | | | 5/15*** 151 -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 24 v = Heat Units on MAY 17; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1245; Last year = 1407 HUs since Jan 1 are running about 2 days behind normal. HU last week = 109 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 18 - MAY 24 This Week : MAY 25 - MAY 31 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 94 58 39 134 ---- Normal 98 59 40 142 Recorded 88 58 42 109 0.12 2007 97 57 44 139 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 48% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): .69" .45" .42" .42" .42" HEAT STRESS LEVELS -------------------------------- Date 5/18 5/19 5/20 5/21 5/22 5/23 5/24 Stress ns ns ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- Last week produced some very unusual weather for late May, including near record cold temperatures & measureable precipitation events in many production areas. The probability of late May precipitation runs about 2% in most low desert areas which means last week's precipitation events fall into the once in a generation or once in a lifetime category. The final storm system in this unusual weather pattern is scheduled to pass north of AZ on Monday & will keep temperatures cool for one more day. High pressure will then develop and intensify over AZ during the rest of the week, bringing a gradual return to the hot & dry conditions that are expected this time of year. Expect clear skies with warm days & mild nights and very low humidity during the latter half of this week. HARQUAHALA COTTON DEVELOPMENT ADVISORY JUN 1, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | |v | | | | | | 3/15********************* 1028 -2 days | |v | | | | | | | 4/1 ***************** 851 -3 days | v | | | | | | | | 4/15************** 677 -5 days | v | | | | | | | | 5/1 ********* 455 -5 days | v | | | | | | | | 5/15***** 247 -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 31 v = Heat Units on MAY 24; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1341; Last year = 1546 HUs since Jan 1 are running about 4 days behind normal. HU last week = 94 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 25 - MAY 31 This Week : JUN 1 - JUN 7 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 98 59 40 142 ---- Normal 97 58 38 135 Recorded 87 49 39 94 0.00 2007 95 59 40 137 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 60% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): .76" .54" .38" .38" .38" HEAT STRESS LEVELS -------------------------------- Date 5/25 5/26 5/27 5/28 5/29 5/30 5/31 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 control weather conditions during the first half of the week. Expect sunny, warm & dry conditions through Wednesday. Another late spring storm system is projected to move across the Great Basin on Wednesday & should produce a couple of days of windy weather & about 5 degrees of cooling. No precipitation is expected with this system & warmer temperatures will return by the weekend. We have now entered the peak evaporative demand season & growers are encouraged to carefully monitor soil moisture in the coming weeks. While the spring of 2008 has been relatively cool, evaporative demand is running at or above normal due to the windy spring conditions. HARQUAHALA COTTON DEVELOPMENT ADVISORY JUN 8, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v | | | | | | 3/15*********************** 1159 -3 days | | v| | | | | | | 4/1 ******************** 982 -3 days | v | | | | | | | 4/15**************** 808 -5 days | v | | | | | | | | 5/1 ************ 586 -5 days | v | | | | | | | | 5/15******** 378 -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 7 v = Heat Units on MAY 31; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1472; Last year = 1683 HUs since Jan 1 are running about 4 days behind normal. HU last week = 131 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 1 - JUN 7 This Week : JUN 8 - JUN 14 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 97 58 38 135 ---- Normal 99 60 39 147 Recorded 94 56 38 131 0.00 2007 100 63 40 156 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 73% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.14" .87" .6" .48" .48" HEAT STRESS LEVELS -------------------------------- Date 6/1 6/2 6/3 6/4 6/5 6/6 6/7 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 generate a warm & dry week across Arizona. Expect a very hot start to the week followed by a slight mid-week cooling trend. The cooling trend will be associated with some breezy conditions as a pair of storm systems pass north of the state on Tuesday & Wednesday. No precipitation is expected with the passage of these storms & temperatures are expected to return to above normal levels late in the week. We have now entered the peak evaporative demand season & growers are encouraged to monitor soil moisture in the coming weeks. Evaporative demand continues to run at above normal levels in many regions, despite the rather cool late spring temperatures. HARQUAHALA COTTON DEVELOPMENT ADVISORY JUN 15, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v| | | | | | 3/15************************** 1306 -2 days | | | v | | | | | | 4/1 *********************** 1129 -3 days | | v | | | | | | | 4/15******************* 955 -5 days | v | | | | | | | | 5/1 *************** 733 -5 days | v | | | | | | | | 5/15********** 525 -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 14 v = Heat Units on JUN 7; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1619; Last year = 1839 HUs since Jan 1 are running about 4 days behind normal. HU last week = 147 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 8 - JUN 14 This Week : JUN 15 - JUN 21 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 99 60 39 147 ---- Normal 103 65 44 167 Recorded 101 59 43 147 0.00 2007 104 63 46 159 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 85% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.26" 1.01" .76" .45" .45" HEAT STRESS LEVELS -------------------------------- Date 6/8 6/9 6/10 6/11 6/12 6/13 6/14 Stress ns ns ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- A strong ridge of high pressure will produce very hot temperatures this week. Expect sunny skies with hot days, mild nights & very low humidity. Temperatures may exceed 110F in central and western production areas. There is an outside chance for widely scattered thunderstorms in southeast AZ early in the week as some tropical moisture seeps in from Mexico. This week's forecast will generate very high rates of evaporative demand which when combined with rapid canopy development will produce high rates of water use. Growers are encouraged to monitor soil moisture & avoid crop water stress. HARQUAHALA COTTON DEVELOPMENT ADVISORY JUN 22, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v | | | | | 3/15****************************** 1478 -2 days | | | v| | | | | | 4/1 ************************** 1301 -3 days | | |v | | | | | | 4/15*********************** 1127 -5 days | |v | | | | | | | 5/1 ****************** 905 -4 days | v | | | | | | | | 5/15************** 697 -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 21 v = Heat Units on JUN 14; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1791; Last year = 1998 HUs since Jan 1 are running about 3 days behind normal. HU last week = 171 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 15 - JUN 21 This Week : JUN 22 - JUN 28 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 65 44 167 ---- Normal 102 66 43 167 Recorded 110 65 45 171 0.00 2007 108 64 45 171 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 93% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.65" 1.37" 1.1" .74" .49" HEAT STRESS LEVELS -------------------------------- Date 6/15 6/16 6/17 6/18 6/19 6/20 6/21 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. Expect a slight cooling trend early in the week as the high shifts south. The word "cooler" is relative as temperatures are expected to remain above normal during this period. The high is expected to move north again later in the week, bringing another bout of very hot temperatures before opening the door for some moisture from Mexico by the weekend. It is possible this influx of moisture will mark the be- ginning of the monsoon. Increased humidity, when combined with above normal temperatures, could produce heat stress problems in low desert production areas. Heat stress reports are available at: http://ag.arizona.edu/azmet/cotton.htm HARQUAHALA COTTON DEVELOPMENT ADVISORY JUL 13, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/15***************************************** 2053 -1 day | | | | | v | | | | 4/1 ************************************** 1876 -1 day | | | | v| | | | | 4/15********************************** 1702 -3 days | | | | v | | | | | 5/1 ****************************** 1480 -3 days | | | v | | | | | | 5/15************************* 1272 -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 12 v = Heat Units on JUL 5; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2366; Last year = 2559 HUs since Jan 1 are running about 2 days behind normal. HU last week = 196 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 6 - JUL 12 This Week : JUL 13 - JUL 19 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 73 56 191 ---- Normal 106 73 52 190 Recorded 103 75 63 196 1.02 2007 108 79 51 206 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.44" 2.17" 1.91" 1.57" 1.26" HEAT STRESS LEVELS -------------------------------- Date 7/6 7/7 7/8 7/9 7/10 7/11 7/12 Stress L1 L1 L1 L1 ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- Last week's unusual stationary storm system has exited the state which should set up a more normal monsoon flow regime this week. Expect warm & very humid weather through mid-week with a chance for afternoon & evening thunderstorms each day. Warmer & slightly drier conditions are expected for the latter half of the week which should lessen the chances for precipitation. Another tropical wave may impact AZ next weekend, increasing the chances for more widespread precipitation. Last week's abnormally cool weather helped minimize problems with heat stress. Heat stress reports are available at: http://ag.arizona.edu/azmet/cotton.htm HARQUAHALA COTTON DEVELOPMENT ADVISORY JUL 13, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/15***************************************** 2053 -1 day | | | | | v | | | | 4/1 ************************************** 1876 -1 day | | | | v| | | | | 4/15********************************** 1702 -3 days | | | | v | | | | | 5/1 ****************************** 1480 -3 days | | | v | | | | | | 5/15************************* 1272 -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 12 v = Heat Units on JUL 5; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2366; Last year = 2559 HUs since Jan 1 are running about 2 days behind normal. HU last week = 196 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 6 - JUL 12 This Week : JUL 13 - JUL 19 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 73 56 191 ---- Normal 106 73 52 190 Recorded 103 75 63 196 1.02 2007 108 79 51 206 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.44" 2.17" 1.91" 1.57" 1.26" HEAT STRESS LEVELS -------------------------------- Date 7/6 7/7 7/8 7/9 7/10 7/11 7/12 Stress L1 L1 L1 L1 ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- Last week's unusual stationary storm system has exited the state which should set up a more normal monsoon flow regime this week. Expect warm & very humid weather through mid-week with a chance for afternoon & evening thunderstorms each day. Warmer & slightly drier conditions are expected for the latter half of the week which should lessen the chances for precipitation. Another tropical wave may impact AZ next weekend, increasing the chances for more widespread precipitation. Last week's abnormally cool weather helped minimize problems with heat stress. Heat stress reports are available at: http://ag.arizona.edu/azmet/cotton.htm HARQUAHALA COTTON DEVELOPMENT ADVISORY JUL 20, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | 3/15********************************************* 2252 0 days | | | | | v | | | | 4/1 ****************************************** 2075 -1 day | | | | | v | | | | 4/15************************************** 1901 -3 days | | | | v| | | | | 5/1 ********************************** 1679 -2 days | | | |v | | | | | 5/15***************************** 1471 -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 19 v = Heat Units on JUL 12; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2565; Last year = 2765 HUs since Jan 1 are running about 1 day behind normal. HU last week = 199 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 13 - JUL 19 This Week : JUL 20 - JUL 26 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 106 73 52 190 ---- Normal 105 75 57 195 Recorded 104 76 61 199 0.01 2007 99 75 57 195 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.31" 2.31" 2.09" 1.77" 1.48" HEAT STRESS LEVELS -------------------------------- Date 7/13 7/14 7/15 7/16 7/17 7/18 7/19 Stress ns ns L1 L1 L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- Typical monsoon weather is in store for much of AZ this week. High pressure will direct a moist flow into southeastern AZ this week. This flow will produce widespread showers & thunderstorms across southeastern production areas. A dry airmass located in eastern CA and western AZ will keep western and central pro- duction areas on the dry side through mid-week. A humid flow regime is expected to move back into central & western AZ by Wednesday, increasing the chances for precipitation in all production areas late in the week. Heat stess continues to run well below normal for this time of year. Growers can monitor heat stress conditions at: http://ag.arizona.edu/azmet/cotton.htm HARQUAHALA COTTON DEVELOPMENT ADVISORY JUL 27, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/15************************************************* 2454 0 days | | | | | v | | | 4/1 ********************************************** 2277 0 days | | | | | v | | | | 4/15****************************************** 2103 -2 days | | | | | v | | | | 5/1 ************************************** 1881 -2 days | | | | v | | | | | 5/15********************************* 1673 -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 26 v = Heat Units on JUL 19; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2767; Last year = 2960 HUs since Jan 1 are running about 1 day behind normal. HU last week = 203 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 20 - JUL 26 This Week : JUL 27 - AUG 2 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 75 57 195 ---- Normal 105 76 59 197 Recorded 104 78 58 203 0.00 2007 100 77 70 200 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.45" 2.45" 2.45" 2.18" 1.87" HEAT STRESS LEVELS -------------------------------- Date 7/20 7/21 7/22 7/23 7/24 7/25 7/26 Stress ns L1 L1 ns L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- Expect a major break in monsoon activity this week. High pressure will develop over western AZ and bring a dry westerly airflow pattern to much of the state. Expect sunny skies, hot temperatures and much lower levels of humidity through at least Thursday. The high pressure system will migrate to the Four Corners region by this weekend, opening the door for more Mexican moisture and a return to typical monsoon weather. Heat stress continues to run well below normal which bodes well for the 2008 crop in central and western production areas. Growers can monitor heat stress conditions at: http://ag.arizona.edu/azmet/cotton.htm HARQUAHALA COTTON DEVELOPMENT ADVISORY AUG 3, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/15***************************************************** 2650 0 days | | | | | | v | | | 4/1 ************************************************* 2473 -1 day | | | | | |v | | | 4/15********************************************** 2299 -2 days | | | | | v | | | | 5/1 ****************************************** 2077 -2 days | | | | | v | | | | 5/15************************************* 1869 -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 2 v = Heat Units on JUL 26; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2963; Last year = 3160 HUs since Jan 1 are running about 1 day behind normal. HU last week = 196 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 27 - AUG 2 This Week : AUG 3 - AUG 9 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 76 59 197 ---- Normal 104 75 58 193 Recorded 107 74 49 196 0.00 2007 100 75 68 193 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.61" 2.61" 2.61" 2.61" 2.31" HEAT STRESS LEVELS -------------------------------- Date 7/26 7/27 7/28 7/29 7/30 7/31 8/1 Stress L1 ns ns ns ns ns L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- A good monsoon flow regime is in place across the Southwest this week. Expect mostly sunny skies with moderate to high levels of humidity & cooler tempera- tures. The moisture will fuel scattered afternoon & evening thunderstorms each day, especially in production areas adjacent to high elevation areas. Long range forecasts suggest a weakening of the flow regime by the coming weekend which may bring a return to drier conditions. Temperatures should average near normal this week. Heat stress conditions typically peak during the first 10 days of August, then decline slowly as we approach Labor Day. Heat stress continues to run at below normal levels in 2008. Growers can monitor local heat stress conditions at: http://ag.arizona.edu/azmet/cotton.htm HARQUAHALA COTTON DEVELOPMENT ADVISORY AUG 10, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | 3/15********************************************************* 2855 0 days | | | | | | v | | | 4/1 ****************************************************** 2678 0 days | | | | | | v | | | 4/15************************************************** 2504 -2 days | | | | | |v | | | 5/1 ********************************************** 2282 -2 days | | | | | v | | | | 5/15***************************************** 2074 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 AUG 9 v = Heat Units on AUG 2; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3168; Last year = 3353 HUs since Jan 1 are running about 1 day behind normal. HU last week = 206 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 3 - AUG 9 This Week : AUG 10 - AUG 16 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 104 75 58 193 ---- Normal 105 75 60 196 Recorded 103 79 62 206 0.12 2007 108 79 60 205 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.29" 2.29" 2.29" 2.29" 2.29" HEAT STRESS LEVELS -------------------------------- Date 8/3 8/4 8/5 8/6 8/7 8/8 8/9 Stress L1 L1 L1 L1 L1 ns L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- High pressure will develop over much of AZ during the first half of the week. Expect warmer temperatures,lower humidity & less thunderstorm activity through mid-week. Longer term forecasts suggest an improved monsoon flow regime will develop later in the week and improve the chances for precipitation. It is un- clear at this time whether humidity levels late in the week will support a large uptick in thunderstorm activity. 2008 continues to be a low heat stress year. Heat stress typically peaks in early August, then declines as we approach Labor Day. Growers can monitor local heat stress conditions at: http://ag.arizona.edu/azmet/cotton.htm HARQUAHALA COTTON DEVELOPMENT ADVISORY AUG 17, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/15************************************************************* 3058 +1 day | | | | | | |v | | 4/1 ********************************************************** 2881 0 days | | | | | | v | | | 4/15****************************************************** 2707 -2 days | | | | | | v | | | 5/1 ************************************************** 2485 -1 day | | | | | v | | | 5/15********************************************** 2277 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 AUG 16 v = Heat Units on AUG 9; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3371; Last year = 3558 HUs since Jan 1 are running about 1 day behind normal. HU last week = 203 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 10 - AUG 16 This Week : AUG 17 - AUG 23 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 75 60 196 ---- Normal 105 76 59 197 Recorded 105 78 58 203 0.00 2007 104 77 59 201 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.52" 2.52" 2.52" 2.52" 2.52" HEAT STRESS LEVELS -------------------------------- Date 8/10 8/11 8/12 8/13 8/14 8/15 8/16 Stress L1 ns ns L1 L1 L1 L1 Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- A significant reduction in monsoon activity is expected this week. A much drier westerly flow regime will dominate the state's weather beginning Monday with a significant reduction in humidity & thunderstorm activity. Expect near normal daytime temperatures & cooler evening temperatures this week. A return to typical monsoon humidity is expected by the coming weekend. Growers can monitor local weather conditions by logging on to the AZMET website at: http://ag.arizona.edu/azmet/ HARQUAHALA COTTON DEVELOPMENT ADVISORY AUG 24, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/15***************************************************************** 3252 0 days | | | | | | | v | | 4/1 ************************************************************** 3075 0 days | | | | | | |v | | 4/15********************************************************** 2901 -2 days | | | | | | v | | | 5/1 ****************************************************** 2679 -1 day | | | | | | v | | | 5/15************************************************* 2471 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 AUG 23 v = Heat Units on AUG 16; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3565; Last year = 3759 HUs since Jan 1 are running about 1 day behind normal. HU last week = 195 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 17 - AUG 23 This Week : AUG 24 - AUG 30 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 105 76 59 197 ---- Normal 103 75 61 192 Recorded 105 74 53 195 0.00 2007 108 77 63 202 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.16" 2.4" 2.43" 2.43" 2.43" HEAT STRESS LEVELS -------------------------------- Date 8/17 8/18 8/19 8/20 8/21 8/22 8/23 Stress L1 L1 ns ns ns ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- An increase in humidity & thunderstorm activity is expected through mid-week as the remnants of tropical storm Julio impact AZ. Expect near normal temperatures, high humidity & scattered thunderstorms Monday & Tuesday. High pressure will redevelop over the region by mid-week, bringing a return to warmer and drier conditions for the remainder of the week. Another surge of humidity is possible by the weekend. Boll maturity estimates can assist growers with decisions pertaining to late season irrigations and crop termination. These estimates are available at http://ag.arizona.edu/azmet/Boll_Maturity_2006.pdf HARQUAHALA COTTON DEVELOPMENT ADVISORY AUG 31, 2008 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v 3445 | 3/15********************************************************************* +1 day | | | | | | | v | | 4/1 ***************************************************************** 3268 0 days | | | | | | | v | | 4/15************************************************************** 3094 -2 days | | | | | | |v | | 5/1 ********************************************************* 2872 -1 day | | | | | | v | | | 5/15***************************************************** 2664 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 AUG 30 v = Heat Units on AUG 23; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3758; Last year = 3961 HUs since Jan 1 are running about 1 day behind normal. HU last week = 193 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 24 - AUG 30 This Week : AUG 31 - SEP 6 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 75 61 192 ---- Normal 100 70 56 180 Recorded 100 75 64 193 1.20 2007 102 73 60 193 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.61" 1.82" 2.02" 2.06" 2.06" HEAT STRESS LEVELS -------------------------------- Date 8/24 8/25 8/26 8/27 8/28 8/29 8/30 Stress L1 ns ns L1 L1 ns ns Key : ns = no stress; L1 = Level 1 Stress; L2 = Level 2 Stress WEATHER UPDATE -------------------------------- A weak storm system & trough of low pressure may produce a significant rain event Sunday & Monday. Warm & dry air will follow this system & could signal the end of the monsoon season. Expect sunny & warm conditions from Tuesday on with much lower humidity. Boll maturity estimates can assist growers with de- cisions pertaining to late season irrigations & crop termination and are avail- able at at http://ag.arizona.edu/azmet/Boll_Maturity_2006.pdf. This will be the final advisory for the 2008 season. We would like to thank the Arizona Cotton Research & Protection Council for their funding assistance which helps keep this program functional. Your feedback regarding the future of this program would be most appreciated. Please email Paul Brown at pbrown@ag.arizona.edu.