Alert archive / Virginia / Frost Advisories in 2012
Frost Advisory 2, NWS Blacksburg, VA
NWS Blacksburg, VA issued this frost advisory at Apr 2, 2012, 3:36 PM EDT for 5 counties in Virginia. It took effect at Apr 3, 2012, 2:00 AM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Apr 2, 2012, 3:36 PM EDT (19:36 UTC)
- In effect from
- Apr 3, 2012, 2:00 AM EDT
- Expired
- Apr 3, 2012, 9:00 AM EDT
- In force
- 7 hr
- Issued by
- NWS Blacksburg, VA
Counties Alleghany County, VA, City of Buena Vista, VA, City of Covington, VA, City of Lexington, VA, Rockbridge County, VA
The radar
The Roanoke radar (KFCX), 101 km from the middle of the area, began a volume at 19:38 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, 7.6 hours before the alert went out and 66 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
- 267 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 666 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
510 WWUS71 KRNK 021936 NPWRNK URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE BLACKSBURG VA 336 PM EDT MON APR 2 2012 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT TUESDAY... .HIGH PRESSURE WILL SETTLE ACROSS THE AREA OVERNIGHT...BRINGING WITH IT A SHOT OF POLAR AIR TO THE ALLEGHANY HIGHLANDS. THIS POLAR AIR...WHEN COMBINED WITH CLEAR SKIES AND LIGHT WINDS...WILL ALLOW TEMPERATURES TO FALL INTO THE LOW TO MID 30S...ESPECIALLY IN SOME OF THE VALLEYS AND DRAINAGES WHERE COOL AIR MAY POOL AT THE BOTTOM. VAZ019-024-030345- /O.NEW.KRNK.FR.Y.0002.120403T0600Z-120403T1300Z/ ALLEGHANY VA-ROCKBRIDGE- INCLUDING THE CITIES OF...CLIFTON FORGE...COVINGTON...LEXINGTON... BUENA VISTA 336 PM EDT MON APR 2 2012 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT TUESDAY... THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 9 AM EDT TUESDAY. * LOCATIONS...VALLEYS AND DRAINAGES IN ROCKBRIDGE AND ALLEGHANY COUNTIES IN VIRGINIA. * TEMPERATURES...TEMPERATURES OVERNIGHT WILL FALL INTO THE LOW TO MID 30S. * IMPACTS...VEGETATION SENSITIVE TO FROST MAY BE DAMAGED OR KILLED IF LEFT UNPROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$
2 follow-up statements
168 WWUS71 KRNK 030147 NPWRNK URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE BLACKSBURG VA 947 PM EDT MON APR 2 2012 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT TUESDAY... .HIGH PRESSURE WILL SETTLE ACROSS THE AREA OVERNIGHT...BRINGING WITH IT A SHOT OF POLAR AIR TO THE ALLEGHANY HIGHLANDS. THIS POLAR AIR...WHEN COMBINED WITH CLEAR SKIES AND LIGHT WINDS...WILL ALLOW TEMPERATURES TO FALL INTO THE LOW TO MID 30S...ESPECIALLY IN SOME OF THE VALLEYS AND DRAINAGES WHERE COOL AIR MAY POOL AT LOWER ELEVATIONS. VAZ019-024-031300- /O.CON.KRNK.FR.Y.0002.120403T0600Z-120403T1300Z/ ALLEGHANY VA-ROCKBRIDGE- INCLUDING THE CITIES OF...CLIFTON FORGE...COVINGTON...LEXINGTON... BUENA VISTA 947 PM EDT MON APR 2 2012 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT TUESDAY... * LOCATIONS...VALLEYS AND DRAINAGES IN ROCKBRIDGE AND ALLEGHANY COUNTIES IN VIRGINIA. * TEMPERATURES...OVERNIGHT LOWS WILL BE IN THE LOWER TO MID 30S. * IMPACTS...VEGETATION SENSITIVE TO FROST MAY BE DAMAGED OR KILLED IF LEFT UNPROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$
991 WWUS71 KRNK 031300 NPWRNK URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE BLACKSBURG VA 900 AM EDT TUE APR 3 2012 VAZ019-024-031400- /O.CAN.KRNK.FR.Y.0002.000000T0000Z-120403T1300Z/ ALLEGHANY VA-ROCKBRIDGE- INCLUDING THE CITIES OF...CLIFTON FORGE...COVINGTON...LEXINGTON... BUENA VISTA 900 AM EDT TUE APR 3 2012 ...FROST ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS CANCELLED THE FROST ADVISORY. TEMPERATURES CONTINUE TO WARM THIS MORNING...AND THE THREAT OF FROST HAS NOW PASSED. $$
The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 2, 12:30 AM EDT | Special Weather Statement | RNK | Bland, Tazewell | 60 min |
| Apr 2, 1:34 AM EDT | Special Weather Statement | RNK | Wythe | 56 min |
Nearby
Frost Advisories in Virginia, 2012Every frost advisory in 2012
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.