Alert archive / Virginia / Frost Advisories in 2021
Frost Advisory 1, NWS Blacksburg, VA
NWS Blacksburg, VA issued this frost advisory at May 12, 2021, 12:37 PM EDT for Greenbrier County, Mercer County, Summers County, West Virginia; 5 counties in Virginia. It took effect at May 13, 2021, 1:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- May 12, 2021, 12:37 PM EDT (16:37 UTC)
- In effect from
- May 13, 2021, 1:00 AM EDT
- Expired
- May 13, 2021, 9:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Blacksburg, VA
Counties Bath County, VA, City of Buena Vista, VA, City of Lexington, VA, Rockbridge County, VA, Tazewell County, VA, Greenbrier County, WV, Mercer County, WV, Summers County, WV
The radar
The Roanoke radar (KFCX), 74 km from the middle of the area, began a volume at 16:40 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 4.6 hours before the alert went out and 86 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1358 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- -114 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
518 WWUS71 KRNK 121637 NPWRNK URGENT - WEATHER MESSAGE National Weather Service Blacksburg VA 1237 PM EDT Wed May 12 2021 VAZ007-020-024-WVZ042-043-507-508-130045- /O.NEW.KRNK.FR.Y.0001.210513T0500Z-210513T1300Z/ Tazewell-Bath-Rockbridge-Mercer-Summers-Eastern Greenbrier- Western Greenbrier- Including the cities of Tazewell, Hot Springs, Lexington, Buena Vista, Bluefield, Flat Top, Hinton, Hix, Lewisburg, White Sulphur Springs, Alderson, Quinwood, Duo, and Rainelle 1237 PM EDT Wed May 12 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM EDT THURSDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...In Virginia, Tazewell, Bath and Rockbridge Counties. In West Virginia, Mercer, Summers, Eastern Greenbrier and Western Greenbrier Counties. * WHEN...From 1 AM to 9 AM EDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
3 follow-up statements
638 WWUS71 KRNK 130227 NPWRNK URGENT - WEATHER MESSAGE National Weather Service Blacksburg VA 1027 PM EDT Wed May 12 2021 VAZ007-020-024-WVZ042-043-507-508-131300- /O.CON.KRNK.FR.Y.0001.210513T0500Z-210513T1300Z/ Tazewell-Bath-Rockbridge-Mercer-Summers-Eastern Greenbrier- Western Greenbrier- Including the cities of Tazewell, Hot Springs, Lexington, Buena Vista, Bluefield, Flat Top, Hinton, Hix, Lewisburg, White Sulphur Springs, Alderson, Quinwood, Duo, and Rainelle 1027 PM EDT Wed May 12 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THURSDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...In Virginia, Tazewell, Bath and Rockbridge Counties. In West Virginia, Mercer, Summers, Eastern Greenbrier and Western Greenbrier Counties. * WHEN...From 1 AM to 9 AM EDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
192 WWUS71 KRNK 130800 NPWRNK URGENT - WEATHER MESSAGE National Weather Service Blacksburg VA 400 AM EDT Thu May 13 2021 VAZ007-020-024-WVZ042-043-507-508-131300- /O.CON.KRNK.FR.Y.0001.000000T0000Z-210513T1300Z/ Tazewell-Bath-Rockbridge-Mercer-Summers-Eastern Greenbrier- Western Greenbrier- Including the cities of Tazewell, Hot Springs, Lexington, Buena Vista, Bluefield, Flat Top, Hinton, Hix, Lewisburg, White Sulphur Springs, Alderson, Quinwood, Duo, and Rainelle 400 AM EDT Thu May 13 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...In Virginia, Rockbridge, Bath and Tazewell Counties. In West Virginia, Summers, Western Greenbrier, Mercer and Eastern Greenbrier Counties. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
686 WWUS71 KRNK 131303 NPWRNK URGENT - WEATHER MESSAGE National Weather Service Blacksburg VA 903 AM EDT Thu May 13 2021 VAZ007-020-024-WVZ042-043-507-508-131415- /O.EXP.KRNK.FR.Y.0001.000000T0000Z-210513T1300Z/ Tazewell-Bath-Rockbridge-Mercer-Summers-Eastern Greenbrier- Western Greenbrier- Including the cities of Tazewell, Hot Springs, Lexington, Buena Vista, Bluefield, Flat Top, Hinton, Hix, Lewisburg, White Sulphur Springs, Alderson, Quinwood, Duo, and Rainelle 903 AM EDT Thu May 13 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures have warmed into the 40s this morning. Therefore, the Frost Advisory has been allowed to expire. $$ RCS
Nearby
Frost Advisories in Virginia, 2021Frost Advisories in West Virginia, 2021Every frost advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.