BY the NUMBERS! Mulit-State Advsiory With Guidelines on Wet Bulbs (Noon, Wed., 3/26/14)

— Written By Barclay Poling
AWIS Hourly Forecast For Raleigh-Durham, NC     
Produced at 11:14 a.m. CDT on Wed Mar 26 2014
Day-Length = 12:21 / Sunrise at  7:10 a.m. / Sunset at  7:31 p.m.

Local               Forecast For  Wednesday     March 26, 2014 
Hour  00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
                      MIN= 27                    MAX= 47
TEMP  38 37 35 34 33 31 30 29 27 30 33 36 38 40 43 44 47 47 44 41 38 36 34 32
DEWP  28 27 26 25 25 23 22 21 19 18 15 11 10  7  6  6  5  5  6  7  7  8  8  9
WETB  34 33 32 31 30 28 27 26 25 26 28 29 30 30 32 33 34 34 33 31 29 28 27 26
WNDS   9  9  9  8  7  6  6  5  5  7  9 13 13 13 13 13 11 10  8  5  1  1  1  0

Special Update – Growers using irrigation tonight will find wet bulb information in the 5-Day Detailed Hourly Weather Forecasts for a location near their farm in this advisory. You need to know when it will drop to 31 F for start-up (some areas starting at 5 p.m.), and also need to know when in the morning tomorrow it will be safe to turn off. Do not shut down the system until wet bulb has reached 32 F. Note that the air temp at the same given hour may be as much as 9-10 F tonight and tomorrow morning. In the  forecast table for RDU (above) you can see that the wet bulb of  31 F will be reached at 1900 (7 p.m.) when the air temp is 41 F. So, you will need to start irrigation up at 7 p.m., or 30 min before sunset.

1. North Carolina Forecast Information Relevant to Strawberry Growers

Here is the state MIN TEMP INFO for the next 7 days: NC AWIS Mar 26 to Apr 2

Here is min temp map or THUR morning, 3/27

thur monr

Wet Bulb?

Just click on the city/town nearest you to see an hourly forecast for tonight and tomorrow morning that includes critical information on HOUR when wet bulb will drop to 31 F, and then be above 32 F tomorrow morning. Do not stop running water until the wet bulb is 32 F.

5-DAY DETAILED HOURLY WEATHER FORECASTS 

2. Virginia Forecast Information Relevant to Strawberry Growers

Here is the state MIN TEMP INFO for the next 7 days:  VA AWIS Mar 26 to Apr 2

Here is min temp map or THUR morning, 3/27

7daytemp.at.2

SkyBit for near Richmond:

Note canopy min of 19; wet bulb of 31 at 5 p.m. tonight; winds still up at cut on time (11 mph), but wil drop to 0. This is going to be a HARD FREEZE and could be very damaging

20140326st1.VACHL

Wet Bulb?

Just click on the city/town nearest you to see an hourly forecast for tonight and tomorrow morning that includes critical information on HOUR when wet bulb will drop to 31 F, and then be above 32 F tomorrow morning. Do not stop running water until the wet bulb is 32 F.

5-DAY DETAILED HOURLY WEATHER FORECASTS 

3. South Carolina Forecast Information Relevant to Strawberry Growers

DATA JUST IN FROM ERIC HUNTER (He ran water on covers)

(10:45 a.m.)

Hey Dr. Poling,
Thanks for the help and info this morning. I cut off around 10 a.m. – blossom temps were around 43 and sun was encompassing the whole fields. Air temps were 35-37. I was amazed at the temperature difference underneath the ice and covers. At 7 a.m. when I texted you, we basically had 20-25 degrees of difference (air 18, blossoms 42-44). That’s impressive. If nothing else, last night was a great learning experience.

Tonight through the weekend. Looks like we will be in the mid 20s tonight (possibly lower at my fields down the road). Rain coming in for sure by Friday late am. My plan is to uncover here at the house today as soon as the covers dry off and just plan on doing overhead tonight (25, no winds). Shouldn’t be a problem. My “away” fields will stay covered as they may be 21-22 tonight and possibly irrigating over them again. Then, remove covers asap tomorrow. Today will be 52ish and tomorrow will be 60+.

Thanks again for the help and advice.
Eric

Here is the state MIN TEMP INFO for the next 7 days: 

Here is min temp map or THUR morning, 3/27

7daytemp.se.2

Wet Bulb (South Carolina)?

Just click on the city/town nearest you to see an hourly forecast for tonight and tomorrow morning that includes critical information on HOUR when wet bulb will drop to 31 F, and then be above 32 F tomorrow morning. Do not stop running water until the wet bulb is 32 F.

5-DAY DETAILED HOURLY WEATHER FORECASTS 

4. Tennessee Forecast Information Relevant to Strawberry Growers

State Min Temp: TN AWIS Mar 26 to Apr 2

Wet Bulb (TN)?

Just click on the city/town nearest you to see an hourly forecast for tonight and tomorrow morning that includes critical information on HOUR when wet bulb will drop to 31 F, and then be above 32 F tomorrow morning. Do not stop running water until the wet bulb is 32 F.

5-DAY DETAILED HOURLY WEATHER FORECASTS 

 5. Kentucky Forecast Information Relevant to Strawberry Growers

AWIS Weather Services, Inc. Western Kentucky Frost/Freeze Forecast
Produced at  504 a.m. CDT on Wed Mar 26 2014

... Forecast for Tonight ... Southwest Kentucky                      
NWS Fcst Zones 1-13                               
**** LITTLE IF ANY FROST DUE TO CLOUDS/WIND **** 

Lowest Temperatures:      37 - 39
Murray Min                  39 
Range Dewpoint Temps:      9 - 28
Range Wetbulb  Temps:     33 - 36
AVG Wind Direction/Speed:   S  9                          
AVG Sky Condition:     Mostly Cloudy

Extended Forecast: Range of Lowest Min Temperatures in the Above Zones
Min Temps Valid For Morning of Given Date (May NOT include ALL cold pockets)

  03/28/14  03/29/14  03/30/14  03/31/14  04/01/14  04/02/14
  --------  --------  --------  --------  --------  --------
   51 - 53   42 - 46   33 - 36   41 - 43   43 - 45   44 - 46
--------

Grayson County Area                     
NWS Fcst Zones 23-24,26-28,61-63                  

**** FREEZE COLD LOCATIONS  ****
**** LITTLE/NO FROST DUE TO DRY AIR **** 

Lowest Temperatures:      31 - 37
Leitchfield Min             33 
Durations at/below 32:     0 -  3
Range Dewpoint Temps:      7 - 25
Range Wetbulb  Temps:     29 - 33
AVG Wind Direction/Speed:  SE  6     Periods of Calm      
AVG Sky Condition:     Mostly Cloudy

Extended Forecast: Range of Lowest Min Temperatures in the Above Zones
Min Temps Valid For Morning of Given Date (May NOT include ALL cold pockets)

  03/28/14  03/29/14  03/30/14  03/31/14  04/01/14  04/02/14
  --------  --------  --------  --------  --------  --------
   49 - 52   41 - 46   31 - 34   38 - 41   40 - 43   41 - 44
--------

For more detailed information visit www.awis.com or call 888-798-9955. Copyright 2014 AWIS Weather Services, Inc. All rights reserved.

Here is the state MIN TEMP INFO for the next 7 days: KY AWIS Mar 26 to Apr 2

Wet Bulb (KY)?

Just click on the city/town nearest you to see an hourly forecast for tonight and tomorrow morning that includes critical information on HOUR when wet bulb will drop to 31 F, and then be above 32 F tomorrow morning. Do not stop running water until the wet bulb is 32 F.

5-DAY DETAILED HOURLY WEATHER FORECASTS 

6. Maryland Forecast Information Relevant to Strawberry Growers

Here is the state MIN TEMP INFO for the next 7 days: MD AWIS Mar 26 to Apr 2

Here is min temp map or THUR morning, 3/27

MD Min MAP

5-DAY DETAILED HOURLY WEATHER FORECASTS 

Dr. E. Barclay Poling
Interim Executive Director, NC Strawberry Association Inc.
& Professor Emeritus (Strawberry Plasticulture Researcher)
Department of Horticultural Science
Campus Box 7609, 162A Kilgore Hall
NC State University
Raleigh, NC 27695-7609

A pessimist sees the difficulty in every opportunity, an optimist sees
the opportunity in every difficulty.

Winston Churchill, Prime Minister of England