MARANA MAR 3, 2002 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | *************** | ****** 298 **** | *************** | | ^ 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 2 v = Heat Units accumulated from JAN 1 - FEB 23 * 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 : FEB 24 - MAR 2 This Week : MAR 3 - MAR 9 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 72 42 31 44 ---- Normal 74 42 32 49 Recorded 75 39 7 50 0.00 2001 68 45 35 33 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 54.7 FEB 28 ; Min = 46.6 MAR 2 WEATHER UPDATE -------------------------------- Sunny & mild through mid-week with above normal temperatures. A storm system is projected to move across AZ on Thursday, bringing an increase in clouds, a chance for scattered showers, & cooler temperatures. Present forecasts indicate this storm will not be nearly as cold as the storm that moved through this past weekend. Growers planning to plant this week should closely monitor the progress & development of this storm. Reminder: Soil temperatures typically stay in the proper range for germination when high temperatures are above 80F & lows are in the upper 40s or higher. Slow and/or poor germination often result during cloudy periods when highs are below 75F & lows drop below 45F. Research indicates soil temperature conditions during the first 24 hours after planting are the most critical for germination. MARANA MAR 10, 2002 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ***************** | ****** 341 ****** | ***************** | | ^ 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 9 v = Heat Units accumulated from JAN 1 - MAR 2 * HIGH:>50%, MEDIUM:25-50%, LOW<25% Spring Emergence after Susceptible Square HEAT UNITS -------------------------------- HUs are running about 3 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 3 - MAR 9 This Week : MAR 10 - MAR 16 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 74 42 32 49 ---- Normal 75 43 30 55 Recorded 74 34 9 43 0.04 2001 72 41 40 39 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 56.3 MAR 8 ; Min = 42.4 MAR 3 WEATHER UPDATE -------------------------------- Sunny & dry through mid-week with above normal temperatures. A late winter storm system is expected to pass through the central Rockies on Thursday. This storm is not expected to generate precipitation in AZ, but will lower temperatures late in the week. Expect temperatures on Thursday to run about 7 degrees below peak values early in the week. Reminder: Soil temperatures typically stay in the proper range for germination when high temperatures are above 80F & lows are in the upper 40s or higher. Slow and/or poor germination often results during cloudy periods when highs are below 75F & lows drop below 45F. Research indicates soil temperature conditions during the first 24 hours after planting are the most critical for germination. MARANA MAR 17, 2002 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ******************** | ******** 394 ******* | ******************** | | ^ 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 16 v = Heat Units accumulated from JAN 1 - MAR 9 * 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 : MAR 10 - MAR 16 This Week : MAR 17 - MAR 23 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 75 43 30 55 ---- Normal 80 46 32 73 Recorded 76 40 17 53 0.00 2001 86 48 33 94 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 57 MAR 14 ; Min = 49.5 MAR 16 WEATHER UPDATE -------------------------------- Cloudy, breezy, & cool on Monday with a chance for showers. High pressure will develop over the region by mid-week, bringing a rapid return to above normal temperatures. Expect sunny & very warm conditions during the latter half of the week. The next storm system will move toward the area on Saturday. Present long-range forecasts indicate this next storm will track north of the area. SOIL TEMPERATURES FOR PLANTING: ** Acceptable when minimum soil temperatures (occur ~ 8am) in the planting zone are 60F or above. ** Optimal when minimum soil temperatures (occur ~ 8am) in the planting zone are 65F or above. Reminder: Soil temperatures typically stay in the proper range for germination when high temperatures are above 80F & lows are in the upper 40s or higher. Slow and/or poor germination often results during cloudy periods when highs are below 75F & lows drop below 45F. Research indicates soil temperature conditions during the first 24 hours after planting are the most critical for germination. MARANA MAR 24, 2002 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | *********************** | ********** 453 ******** | *********************** | | ^ 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 23 v = Heat Units accumulated from JAN 1 - MAR 16 * 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 : MAR 17 - MAR 23 This Week : MAR 24 - MAR 30 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 80 46 32 73 ---- Normal 75 45 32 55 Recorded 78 40 20 59 0.00 2001 86 52 29 98 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 57.9 MAR 22 ; Min = 48.7 MAR 19 WEATHER UPDATE -------------------------------- High pressure will build over Arizona this week, bringing warm & dry weather. Expect temperatures to increase from near normal on Monday to 5-7 degrees above normal by Friday. SOIL TEMPERATURES FOR PLANTING: ** Acceptable when minimum soil temperatures (occur ~ 8am) in the planting zone are 60F or above. ** Optimal when minimum soil temperatures (occur ~ 8am) in the planting zone are 65F or above. Reminder: Soil temperatures typically stay in the proper range for germination when high temperatures are above 80F & lows are in the upper 40s or higher. Slow and/or poor germination often results during cloudy periods when highs are below 75F & lows drop below 45F. Research indicates soil temperature conditions during the first 24 hours after planting are the most critical for germination. MARANA MAR 31, 2002 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ************************** | *********** 513 ********** | ************************** | | ^ 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 30 v = Heat Units accumulated from JAN 1 - MAR 23 * 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 : MAR 24 - MAR 30 This Week : MAR 31 - APR 6 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 75 45 32 55 ---- Normal 77 46 33 64 Recorded 77 45 26 59 0.00 2001 79 52 34 77 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 58.6 MAR 28 ; Min = 54.5 MAR 25 WEATHER UPDATE -------------------------------- High pressure will remain over AZ all this week, bringing dry weather and above normal temperatures. Temperatures should average about 5 degrees above normal. Forecasted weather conditions should maintain soil temperatures in the acceptable to optimal range for germination (see below). Growers are encouraged to check soil temperatures prior to planting. SOIL TEMPERATURES FOR PLANTING: ** Acceptable when minimum soil temperatures (occur ~ 8am) in the planting zone are 60F or above. ** Optimal when minimum soil temperatures (occur ~ 8am) in the planting zone are 65F or above. Reminder: Soil temperatures typically stay in the proper range for germination when high temperatures are above 80F & lows are in the upper 40s or higher. Slow and/or poor germination often results during cloudy periods when highs are below 75F & lows drop below 45F. Research indicates soil temperature conditions during the first 24 hours after planting are the most critical for germination. MARANA APR 7, 2002 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ******************************* | ************** 625 ************ | ******************************* | | ^ 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 6 v = Heat Units accumulated from JAN 1 - MAR 30 * 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 31 - APR 6 This Week : APR 7 - APR 13 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 77 46 33 64 ---- Normal 82 48 30 81 Recorded 89 53 28 112 0.00 2001 72 43 43 43 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 64 APR 6 ; Min = 55.9 MAR 31 WEATHER UPDATE -------------------------------- A fairly stable weather pattern is expected over AZ this week. Expect clear to partly cloudy weather with near normal temperatures. Some clouds & higher winds may develop as storm systems pass across Utah during the week. At present, the storms are not expected to generate precipitation nor cold weather in AZ. Reminder: Soil temperatures typically stay in the proper range for germination when high temperatures are above 80F & lows are in the upper 40s or higher. Slow and/or poor germination often results during cloudy periods when highs are below 75F & lows drop below 45F. Research indicates soil temperature conditions during the first 24 hours after planting are the most critical for germination. SOIL TEMPERATURES FOR PLANTING: ** Acceptable when minimum soil temperatures (occur ~ 8am) in the planting zone are 60F or above. ** Optimal when minimum soil temperatures (occur ~ 8am) in the planting zone are 65F or above. MARANA APR 14, 2002 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | ************************************* | **************** 731 **************** | ************************************* | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 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 7 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 7 - APR 13 This Week : APR 14 - APR 20 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 82 48 30 81 ---- Normal 83 49 31 86 Recorded 88 53 36 107 0.00 2001 90 54 33 111 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 65.5 APR 13 ; Min = 60.8 APR 8 WEATHER UPDATE -------------------------------- A series of storm systems will pass north of AZ this week, producing higher winds and near normal temperatures. The first system will generate high winds & a chance for widely scattered showers & thunderstorms Monday evening. Another system may impact the area later in the week. Expect temperatures to average near normal for the week. Precipitation is most likely Monday & Tuesday, but is expected to be scattered and light. Annual heat unit accumulation (HU) exceeds 600 in many locations (see graph above). Growers are encouraged to complete their plantings of full season varieties before HU accumulation exceeds the 600 level. Once HU accumulation exceeds the 600-700 range, medium & shorter maturity varieties often perform better. MARANA APR 21, 2002 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 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 8 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 14 - APR 20 This Week : APR 21 - APR 27 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 83 49 31 86 ---- Normal 85 51 32 94 Recorded 85 53 34 102 0.00 2001 90 54 34 114 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 70.2 APR 15 ; Min = 62.8 APR 20 WEATHER UPDATE -------------------------------- High pressure will dominate AZ weather early in the week. Expect warm & dry conditions with scattered high clouds through Thursday. Another Pacific storm is projected to pass through AZ on Friday. Current projections indicate this storm will not generate significant precipitation -- just cooler temperatures with clouds and an increase in wind speed. Temperatures should average about 3-5 degrees above normal this week. SEASONAL OUTLOOK: The most recent long range forecast issued by the Climate Prediction Center indicates a strong bias toward above normal temperatures for the period May through July. The CPC is not providing any guidance on summer precipitation which is not unusual as the Monsoon is difficult to forecast. Annual heat unit accumulation (HU) now exceeds 700 in most locations (see graph above). Growers are encouraged to plant medium & shorter maturity varieties once annual HU accumulation exceed about 700. MARANA APR 28, 2002 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | PINK BOLLWORM SUSCEPTIBILITY * | +---------+------------+-----------------------------------------+ | | HIGH | MEDIUM | LOW | | | v | *********************************************** | ********************** 938 ******************** | *********************************************** | | ^ 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 8 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 21 - APR 27 This Week : APR 28 - MAY 4 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 85 51 32 94 ---- Normal 87 52 29 105 Recorded 87 52 30 104 0.00 2001 88 54 35 109 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 69.8 APR 25 ; Min = 59.9 APR 21 WEATHER UPDATE -------------------------------- A late spring storm system will pass north of AZ on Tuesday, bringing unsettled weather for the 1st half of the week. Cloudy, windy & warm conditions on Monday will give way to windy & cooler weather through mid-week. This storm system is expected to be dry, so there is little chance for precipitation in southern & central AZ. A warming trend late in the week should return temperatures to above normal levels by the weekend. NOTE! This will be the final Planting Date Advisory for the 2002 season. Crop Development Advisories will issued for central & southeastern Arizona beginning next week. SEASONAL OUTLOOK: The most recent long range forecast issued by the Climate Prediction Center indicates a strong bias toward above normal temperatures for the period May through July. The CPC is not providing any guidance on summer precipitation which is not unusual -- the Monsoon is difficult to forecast. MARANA COTTON DEVELOPMENT ADVISORY MAY 5, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | | 3/15************* 645 +5 days | v | | | | | | | | 4/1 ********** 494 +5 days | v | | | | | | | | 4/15***** 264 0 days | | | | | | | | | 5/1 39 -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 4 v = Heat Units on APR 27; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1036; Last year = 915; Normal = 930 HUs are running about 6 days ahead of normal. HU last week = 97 HISTORICAL STATISTICS -------------------------------- Last Week : APR 28 - MAY 4 This Week : MAY 5 - MAY 11 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 87 52 29 105 ---- Normal 90 54 30 115 Recorded 85 51 27 97 0.00 2001 99 61 26 152 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 25% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): .39" .39" .39" .39" WEATHER UPDATE -------------------------------- High pressure will dominate AZ weather for much of the week. Expect sunny, warm & dry conditions for most of the week. Current forecasts call for the jet stream to drop into northern AZ late in the week. While no precipitation is expected with the return of the jet stream, expect increased winds, some clouds & slightly cooler weather for the weekend. Temperatures should average near normal for the week. FALL OUTLOOK: The Climate Prediction Center (CPC) is monitoring what appears to be the early stages of a new El Nino event. The CPC expects further movement toward a mature El Nino condition which typically brings above normal winter precipitation in the Southwest. As a result, current CPC forecasts for the fall & winter indicate a bias toward above normal precipitation. MARANA COTTON DEVELOPMENT ADVISORY MAY 12, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v| | | | | | | | 3/15*************** 761 +5 days | v | | | | | | | | 4/1 ************ 610 +5 days | v | | | | | | | | 4/15******** 380 0 days | | | | | | | | | 5/1 *** 155 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 11 v = Heat Units on MAY 4; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1152; Last year = 1067; Normal = 1045 HUs are running about 6 days ahead of normal. HU last week = 116 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 5 - MAY 11 This Week : MAY 12 - MAY 18 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 90 54 30 115 ---- Normal 93 57 32 129 Recorded 91 54 23 116 0.00 2001 95 63 36 152 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 37% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): .54" .49" .49" .49" WEATHER UPDATE -------------------------------- Strong High pressure will drive temperatures near the century mark on Monday & Tuesday. High winds are possible in Southeast AZ during this period. An upper level disturbance will pass over AZ on Tuesday and is expected to return temperatures to more seasonable levels for the remainder of the week. No rainfall is expected this week. Temperatures should average about 3 degrees above normal for the week. El Nino Watch: The Climate Prediction Center's (CPC) latest update (May 9) on ENSO indicates development of the next El Nino has slowed. The current CPC view is that there will be a gradual evolution to a weak to moderate El Nino condition by late 2002. Strong El Nino conditions generally produce above normal winter precipitation in AZ & the Southwest. The relationship between weak to moderate El Nino conditions & precipitation is not as definitive. MARANA COTTON DEVELOPMENT ADVISORY MAY 19, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | |v | | | | | | | 3/15****************** 896 +4 days | v | | | | | | | | 4/1 *************** 745 +5 days | v | | | | | | | | 4/15********** 515 0 days | v | | | | | | | | 5/1 ****** 290 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 18 v = Heat Units on MAY 11; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1287; Last year = 1219; Normal = 1174 HUs are running about 6 days ahead of normal. HU last week = 135 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 12 - MAY 18 This Week : MAY 19 - MAY 25 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 93 57 32 129 ---- Normal 93 57 32 130 Recorded 97 56 25 135 0.00 2001 102 64 36 166 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 53% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): .77" .51" .5" .5" WEATHER UPDATE -------------------------------- A strong late spring storm will pass through AZ early this week. Expect windy & warm conditions on Monday to give way to much cooler weather on Tuesday & Wednesday. No precipitation is expected with the passage of this storm system. High pressure will develop over AZ late in the week & bring a rapid warm up for the holiday weekend. El Nino Watch: The Climate Prediction Center's (CPC) latest update (May 9) on ENSO indicates development of the next El Nino has slowed. The current CPC view is that there will be a gradual evolution to a weak to moderate El Nino condition by late 2002. Strong El Nino conditions generally produce above normal winter precipitation in AZ & the Southwest. The relationship between weak to moderate El Nino conditions & precipitation is not as definitive. MARANA COTTON DEVELOPMENT ADVISORY MAY 26, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | v | | | | | | 3/15******************** 1007 +4 days | |v | | | | | | | 4/1 ***************** 856 +4 days | v | | | | | | | | 4/15************* 626 -1 day | v | | | | | | | | 5/1 ******** 401 -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 25 v = Heat Units on MAY 18; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1398; Last year = 1385; Normal = 1303 HUs are running about 5 days ahead of normal. HU last week = 110 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 19 - MAY 25 This Week : MAY 26 - JUN 1 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 93 57 32 130 ---- Normal 95 58 33 136 Recorded 89 53 26 110 0.00 2001 102 64 33 162 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 66% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): .93" .68" .47" .47" WEATHER UPDATE -------------------------------- High pressure will build over AZ this week, bringing our first period of sustained high temperatures. Expect sunny skies, low humidity, and hot daytime temperatures. Temperatures will cool rapidly after sunset, so high night temperatures should not be a problem. Moisture from Tropical Storm Alma is expected to seep into AZ during the weekend and should produce more clouds, cooler temperatures and a slight chance for thunder showers. Temperatures should average about 3 degrees above normal this week. MARANA COTTON DEVELOPMENT ADVISORY JUN 2, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v | | | | | | 3/15*********************** 1159 +4 days | | v| | | | | | | 4/1 ******************** 1008 +5 days | v | | | | | | | | 4/15**************** 778 0 days | v | | | | | | | | 5/1 *********** 553 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 JUN 1 v = Heat Units on MAY 25; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1550; Last year = 1547; Normal = 1439 HUs are running about 5 days ahead of normal. HU last week = 154 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 26 - JUN 1 This Week : JUN 2 - JUN 8 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 95 58 33 136 ---- Normal 98 60 30 144 Recorded 100 61 30 154 0.00 2001 104 63 28 162 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 80% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 1.21" .95" .56" .5" WEATHER UPDATE -------------------------------- A trough of low pressure will move across AZ early in the week, bringing breezy conditions and slightly cooler temperatures. No precipitation is expected with this system. Higher temperatures and less windy conditions will return for the latter half of the week as high pressure redevelops over AZ. Humidity will continue at low levels which will allow night temperatures to remain mild. Forecasters indicate the early signs of the monsoon are beginning to develop in Mexico. These signs are normal for this time of year and are not indicative of an early monsoon. MARANA COTTON DEVELOPMENT ADVISORY JUN 9, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v| | | | | | 3/15************************** 1322 +5 days | | | v | | | | | | 4/1 *********************** 1171 +5 days | | v | | | | | | | 4/15******************* 941 +1 day | v | | | | | | | | 5/1 ************** 716 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 8 v = Heat Units on JUN 1; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1713; Last year = 1709; Normal = 1583 HUs are running about 6 days ahead of normal. HU last week = 164 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 2 - JUN 8 This Week : JUN 9 - JUN 15 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 98 60 30 144 ---- Normal 99 63 32 158 Recorded 102 64 27 164 0.00 2001 102 63 24 161 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 90% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 1.64" 1.36" .92" .55" WEATHER UPDATE -------------------------------- High pressure will redevelop over AZ by mid-week, bringing a return to hot & dry weather. Expect sunny, hot & dry conditions this week with less wind. Temperatures should average about 3 degrees above normal. El Nino Update. The Climate Prediction Center has issued its latest update on El Nino (6 June). The gradual evolution toward El Nino conditions continued in May. In recent months, forecasters have observed significant month-to-month variation in the indices used to identify El Nino conditions. Forecasters expect this trend to continue, but still project the development of weak to moderate El Nino conditions during the remainder of 2002. Fall & winter precipitation generally runs above normal when strong El Nino conditions prevail. The relationship between El Nino and fall & winter precipitation is less reliable when weak to moderate El Nino conditions prevail. MARANA COTTON DEVELOPMENT ADVISORY JUN 16, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v | | | | | 3/15****************************** 1491 +5 days | | | v| | | | | | 4/1 *************************** 1340 +5 days | | |v | | | | | | 4/15********************** 1110 +2 days | v | | | | | | | 5/1 ****************** 885 +1 day | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUN 15 v = Heat Units on JUN 8; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1882; Last year = 1870; Normal = 1742 HUs are running about 6 days ahead of normal. HU last week = 168 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 9 - JUN 15 This Week : JUN 16 - JUN 22 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 99 63 32 158 ---- Normal 102 66 34 168 Recorded 103 66 30 168 0.00 2001 104 72 30 185 PINK BOLLWORM EMERGENCE -------------------------------- Spring emergence of PBW should be about 95% complete at this time. ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 1.92" 1.64" 1.21" .8" WEATHER UPDATE -------------------------------- High pressure will dominate AZ weather again this week. Expect clear, hot & dry weather with light winds. Temperatures will exceed 100 degrees in most production areas amd may exceed 110 degrees along the Colorado River. The warmest conditions are expected during the first half of the week; some slight cooling is expected late in the week. Temperatures should average about 5 degrees above normal. El Nino Update... The Climate Prediction Center has issued its latest update on El Nino (6 June). The gradual evolution toward El Nino conditions continued in May. In recent months, forecasters have observed significant month-to-month variation in the indices used to identify El Nino conditions. Forecasters expect this trend to continue, but still project the development of weak to moderate El Nino conditions during the remainder of 2002. Fall & winter precipitation generally runs above normal when strong El Nino conditions prevail. The relationship between El Nino and fall & winter precipitation is less reliable when weak to moderate El Nino conditions prevail. MARANA COTTON DEVELOPMENT ADVISORY JUN 23, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v| | | | | 3/15********************************* 1670 +5 days | | | | v | | | | | 4/1 ****************************** 1519 +5 days | | | v | | | | | | 4/15************************** 1289 +2 days | | v | | | | | | 5/1 ********************* 1064 +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 22 v = Heat Units on JUN 15; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2061; Last year = 2055; Normal = 1910 HUs are running about 6 days ahead of normal. HU last week = 179 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 16 - JUN 22 This Week : JUN 23 - JUN 29 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 102 66 34 168 ---- Normal 104 69 36 179 Recorded 109 68 31 179 0.00 2001 100 70 52 179 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 2.43" 2.12" 1.66" 1.21" WEATHER UPDATE -------------------------------- More hot & dry weather is expected this week. Expect mostly sunny skies, hot daytime temperatures, & low humidity. Temperatures should exceed 100 degrees in most production areas & may exceed 110 in western AZ. Nights should remain mild due to continuing low humidity. Temperatures should average about 5 degrees above normal. Monsoon Update... Moisture is moving up into Northern Mexico, but the flow regime required to draw this moisture into AZ is not present at this time. The Monsoon season normally begins between the 3rd & 7th of July. The starting time & subsequent intensity of the monsoon are very difficult to forecast. There appears to be little relationship between El Nino & the summer monsoon. MARANA COTTON DEVELOPMENT ADVISORY JUN 30, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/15************************************* 1853 +5 days | | | | v| | | | | 4/1 ********************************** 1702 +5 days | | | | v | | | | | 4/15***************************** 1472 +2 days | | | v | | | | | | 5/1 ************************* 1247 +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 29 v = Heat Units on JUN 22; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2244; Last year = 2234; Normal = 2088 HUs are running about 6 days ahead of normal. HU last week = 183 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 23 - JUN 29 This Week : JUN 30 - JUL 6 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 104 69 36 179 ---- Normal 103 72 46 186 Recorded 109 70 29 183 0.00 2001 102 75 53 192 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 2.5" 2.23" 1.82" 1.41" WEATHER UPDATE -------------------------------- Hot & dry weather is expected for central & western AZ through mid-week. An upper level trough will move across AZ during the latter part of the week, bringing some high clouds & cooler temperatures. Present forecasts indicate humidity levels will remain on the low side for central & western AZ this week. Some monsoon moisture is seeping into the state in Southeast AZ, but moisture levels are marginal for good thunderstorm development. Expect some isolated, mostly mountain thunderstorms in the regions east of Tucson. The monsoon appears to be developing at this time which is about normal. The normal starting date for the monsoon is between the 3rd & 7th of July in southeast AZ and a few days later in central and western AZ. The Weather Service declares the monsoon official once the dew point temperature averages 54F or higher for three consecutive days. MARANA COTTON DEVELOPMENT ADVISORY JUL 7, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | | 3/15***************************************** 2040 +5 days | | | | | v | | | | 4/1 ************************************** 1889 +5 days | | | | v | | | | | 4/15********************************* 1659 +2 days | | | |v | | | | | 5/1 ***************************** 1434 +2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 6 v = Heat Units on JUN 29; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2431; Last year = 2426; Normal = 2274 HUs are running about 6 days ahead of normal. HU last week = 188 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 30 - JUL 6 This Week : JUL 7 - JUL 13 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 103 72 46 186 ---- Normal 100 72 55 185 Recorded 106 71 35 188 0.00 2001 99 73 62 188 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 2.83" 2.56" 2.14" 1.74" WEATHER UPDATE -------------------------------- Moisture is expected to move into AZ this week from east to west, bringing the start to the Monsoon season. Expect hot temperatures with increasing humidity and increasing chances for afternoon thunderstorms. Thunderstorms will mainly be confined to high elevation areas of eastern AZ on Monday, then increase in aerial coverage & frequency during the remainder of the week. The expected combination of high temperatures and rising humidity is likely to generate heat stress conditions in much of the low desert this week. Local heat stress updates are available from AZMET at http://ag.arizona.edu/azmet. Click on the Weekly Cotton Advisory Button & then click on Heat Stress Updates. MARANA COTTON DEVELOPMENT ADVISORY JUL 14, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | v | | | 3/15********************************************* 2235 +5 days | | | | | v | | | | 4/1 ****************************************** 2084 +5 days | | | | | v | | | | 4/15************************************* 1854 +2 days | | | | v | | | | | 5/1 ********************************* 1629 +2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 13 v = Heat Units on JUL 6; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2626; Last year = 2614; Normal = 2459 HUs are running about 6 days ahead of normal. HU last week = 196 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 7 - JUL 13 This Week : JUL 14 - JUL 20 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 100 72 55 185 ---- Normal 100 72 54 185 Recorded 107 74 53 196 0.04 2001 99 73 62 191 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 2.43" 2.43" 2.12" 1.78" WEATHER UPDATE -------------------------------- Typical monsoon weather should continue this week. Expect moderate humidity, above normal temperatures, and a chance for scattered afternoon and evening thunderstorms each day. Daytime temperatures should be slightly lower this week due to higher humidity and an increase in afternoon clouds. These same conditions, however, will produce warmer night temperatures. Most lower desert production regions experienced heat stress conditions last week. Location specific heat stress reports are available via the AZMET WebPage (http://ag.arizona.edu/azmet). Click on Weekly Cotton Advisories, then click on Heat Stress Updates. MARANA COTTON DEVELOPMENT ADVISORY JUL 21, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/15************************************************* 2427 +6 days | | | | | |v | | | 4/1 ********************************************** 2276 +6 days | | | | | v | | | | 4/15***************************************** 2046 +3 days | | | | | v | | | | 5/1 ************************************ 1821 +2 days | | | | | | | | | | Pin Sus 1st 1" Pk. Bloom Cut-Out Terminate | | head Sq. Flowr Boll +---+---+ +---+---+ +---+---+ | | S M F S M F S M F | +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+ 0 400 800 1200 1600 2000 2400 2800 3200 3600 HEAT UNITS ACCUMULATED FROM PLANTING to JUL 20 v = Heat Units on JUL 13; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 2818; Last year = 2805; Normal = 2644 HUs are running about 7 days ahead of normal. HU last week = 191 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 14 - JUL 20 This Week : JUL 21 - JUL 27 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 100 72 54 185 ---- Normal 100 72 56 185 Recorded 100 74 61 191 0.28 2001 99 73 62 190 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 1.98" 1.98" 1.97" 1.69" WEATHER UPDATE -------------------------------- Forecasters expect an active week for the monsoon. Moisture will again move into AZ & bring an upswing in thunderstorm activity beginning Monday in SE AZ & spreading west across the state on Tuesday. Expect temperatures to run near normal levels & dew points to run above normal for the week. Heat stress lessened in most areas last week due to cooler temperatures & lower humidity. This week's forecast suggests a return to more difficult heat stress conditions by mid-week. Heat stress reports are available for many production areas at: http://ag.arizona.edu. Simply click on the Weekly Cotton Advisories button, then click on Heat Stress Updates. MARANA COTTON DEVELOPMENT ADVISORY JUL 28, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v | | | 3/15**************************************************** 2620 +6 days | | | | | | v | | | 4/1 ************************************************* 2469 +6 days | | | | | v | | | 4/15********************************************* 2239 +3 days | | | | | v | | | | 5/1 **************************************** 2014 +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 27 v = Heat Units on JUL 20; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3011; Last year = 2995; Normal = 2829 HUs are running about 7 days ahead of normal. HU last week = 194 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 21 - JUL 27 This Week : JUL 28 - AUG 3 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 100 72 56 185 ---- Normal 100 73 59 190 Recorded 100 75 63 194 0.47 2001 100 73 64 188 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 2.16" 2.16" 2.16" 2.1" WEATHER UPDATE -------------------------------- Drier air that entered much of the state over the weekend will remain in place through Tuesday at most locations. Monsoon activity is expected to increase again by mid-week as high pressure redevelops over the Four Corners region. This high pressure will allow moisture to enter the state and should produce increased chances for afternoon and evening thunderstorms through the weekend. Expect hot temperatures on Monday and Tuesday, followed by some gradual cooling as the humidity returns. MARANA COTTON DEVELOPMENT ADVISORY AUG 4, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | v| | | 3/15******************************************************** 2815 +6 days | | | | | | v | | | 4/1 ***************************************************** 2664 +6 days | | | | | | v | | | 4/15************************************************* 2434 +3 days | | | | | v| | | | 5/1 ******************************************** 2209 +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 3 v = Heat Units on JUL 27; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3206; Last year = 3183; Normal = 3018 HUs are running about 7 days ahead of normal. HU last week = 195 HISTORICAL STATISTICS -------------------------------- Last Week : JUL 28 - AUG 3 This Week : AUG 4 - AUG 10 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 100 73 59 190 ---- Normal 100 72 60 186 Recorded 98 76 58 195 0.04 2001 97 72 67 183 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 1.89" 1.89" 1.89" 1.89" WEATHER UPDATE -------------------------------- Monsoonal activity will continue across much of AZ this week with the peak activity expected early in the week. A tropical disturbance will pass east to west across the state Monday & Tuesday & is expected to intensify monsoon activity. Warmer temperatures, lower humidity and a chance for afternoon thunderstorms are expected for the remainder of the week. For the week, expect temperature & humidity to average near normal. MARANA COTTON DEVELOPMENT ADVISORY AUG 11, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/15************************************************************ 3004 +6 days | | | | | | v | | 4/1 ********************************************************* 2853 +6 days | | | | | | v | | | 4/15**************************************************** 2623 +3 days | | | | | | v | | | 5/1 ************************************************ 2398 +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 10 v = Heat Units on AUG 3; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3395; Last year = 3366; Normal = 3204 HUs are running about 7 days ahead of normal. HU last week = 188 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 4 - AUG 10 This Week : AUG 11 - AUG 17 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 100 72 60 186 ---- Normal 99 72 62 182 Recorded 100 74 62 188 0.71 2001 97 72 66 183 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 2" 2" 2" 2" WEATHER UPDATE -------------------------------- A break in the Monsoon! High pressure will dominate AZ weather this week, producing mostly clear skies, hot temperatures and below normal dew points. Expect temperatures to run 4-8 degrees above normal. Precipitatation will be limited to scattered afternoon thunderstorms in high elevation areas and near the Mexico border. Current forecasts suggest the monsoon will return for the weekend. MARANA COTTON DEVELOPMENT ADVISORY AUG 18, 2002 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | | | | v | | 3/15**************************************************************** 3205 +7 days | | | | | | | v | | 4/1 ************************************************************* 3054 +7 days | | | | | | v| | | 4/15******************************************************** 2824 +4 days | | | | | | v | | | 5/1 **************************************************** 2599 +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 17 v = Heat Units on AUG 10; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 3596; Last year = 3549; Normal = 3387 HUs are running about 8 days ahead of normal. HU last week = 201 HISTORICAL STATISTICS -------------------------------- Last Week : AUG 11 - AUG 17 This Week : AUG 18 - AUG 24 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 99 72 62 182 ---- Normal 98 72 63 183 Recorded 104 77 58 201 0.00 2001 102 70 66 179 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): 2.15" 2.38" 2.38" 2.38" WEATHER UPDATE -------------------------------- Expect an uptick in monsoon activity this week. High pressure over Texas will bring a return to southerly flow in AZ which will increase moisture and enhance thunderstorm activity this week. Present forecasts indicate the eastern half of AZ will remain in monsoon flow most of the week. Drier northwesterly flow is expected to develop across western AZ by mid-week and decrease the chances for precipitation in that region for the latter half of the week. Most areas will experience above normal humidity and near normal temperatures this week.