Frost Potential in Upper Mountains NC, VA and Maryland (Tue., 5:25pm, 4/21/15)

— Written By Barclay Poling

Good afternoon,

I just heard from a MD grower today who had hail damage yesterday, and is now looking at frost on Thur and Fri  morning in his section of MD (close to DC)! That is about as bad as going from a frost one morning to a heat wave in just 24 hours! And, according to AWIS and SkyBit, there is a good chance of frost in many areas of Maryland for potentially 3 mornings in a row (starting Thursday morning).

waldorf_md

schl hail leafshl bloomFigs. 1-2. A hailstorm in MD caused damage to plant canopy and blooms yesterday.

2015-04-21_17-33-16Table 1. In areas like Frederick, MD, there is potential for frost 3 mornings in a row!

Maryland growers will want to check the AWIS 10 day hourly forecast for a location near them:

10-DAY DETAILED HOURLY WEATHER FORECASTS 

Aberdeen Andrews_AFB Annapolis_Naval Baltimore_Sci_Ce
Baltimore/Wash Cambridge/Dorche College_Park_AP Cumberland_AP
Easton_MD Fort_Meade Frederick_MD Gaithersburg_AP
Hagerstown_AP Leonardtown Middle_River Oakland_MD_AP
Ocean_City_AP Patuxent_River Salisbury Stevensville_AP
St_Inigoes/Webst Washington_DC_AP Westminster_AP

What about Western NC?

The forecast for frost later this week in MD led me to investigate what might be happening in NC, and sure enough, there is good chance of FROST in our  upper mountains of NC this Friday morning (4/24):

booneTable 1. Frost potential is very high in upper mountains of NC Thursday night/Friday morning.

7daytemp.nc.6Fig. 3. There is risk of frost on Thursday night/Friday morning in the upper mountains. Here are the actual minimums for the next 7 days across NC: AWIS NC Apr 21-28

What about Virginia?

Let’s look first at the AWIS minimum temp maps for VA (and Mid-Atlantic) for Thur and Fri:

7daytemp.at.4 7daytemp.at.6

Clearly, there is potential for frost in many western VA locations on both Thur and Fri – just look at all those lows in the low 30’s!

2015-04-21_17-43-19

And, in Central VA it will be very chilly on Thur and Fri mornings as well!

2015-04-21_17-45-37

Virginia growers in western and central areas with minimums in mid 30s and lower will need to carefully monitor for potential frost on Thur and Friday mornings – here are the statewide minimums: AWIS VA Apr 21-28

AWIS Detailed Forecasts for multiple VA locations:

10-DAY DETAILED HOURLY WEATHER FORECASTS 

Abingdon Ashland_VA Charlottesville Chesapeake-Ches
Culpeper Danville Dublin/New_Riv Emporia_VA
Farmville Fentress_Naval_A Fort_Belvoir/Da Fort_Eustis/Fel
Franklin/J_B_Ro Hillsville Hot_Springs/Ing Jonesville_AP
Langley_AFB Leesburg/Godfre Louisa-Louisa_C Lynchburg
Manassas_Muni(A Marion/Wythev Martinsville Mecklenburg/Bru
Melfa/Accomack Newport_News Norfolk_Hampton_ Norfolk_NAS
Norfolk_VA Oceana Orange_VA Petersburg_(AWO
Quantico Richlands_AP Richlands_VA Richmond
Richmond_Chester Roanoke Shannon_Arpt Stafford_AP_VA
Staunton-Shenan Suffolk-Suffolk Tappahannock_AP Virginia_Tech_A
Wakefield_AP Wallops_Island Warrenton_Fauqui Washington_Dulle
West_Point_VA Williamsburg_VA Winchester_Rgnl Wise/Lonesome_P

A little later this evening I will post an advisory on dealing with hail damage.

Barclay Poling