Alert archive / Virginia / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 161, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 12, 2021, 3:37 PM EDT for Craig County, Montgomery County, Roanoke County, Virginia. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2021, 3:37 PM EDT (19:37 UTC)
- Expired
- Aug 12, 2021, 4:30 PM EDT
- In force
- 53 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Craig County, VA, Montgomery County, VA, Roanoke County, VA
The radar
The Roanoke radar (KFCX), 34 km from the middle of the area, began a volume at 19:39 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 67 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
- 75 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 1340 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- -11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
182
WUUS51 KRNK 121937
SVRRNK
VAC045-121-161-122030-
/O.NEW.KRNK.SV.W.0161.210812T1937Z-210812T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
337 PM EDT Thu Aug 12 2021
The National Weather Service in BLACKSBURG has issued a
* Severe Thunderstorm Warning for...
Northwestern Roanoke County in west central Virginia...
South central Craig County in southwestern Virginia...
Northeastern Montgomery County in southwestern Virginia...
* Until 430 PM EDT.
* At 337 PM EDT, a severe thunderstorm was located near Abbott, or
near Sinking Creek, moving southeast at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Catawba...
Glenvar...
Mc Donalds Mill...
and Bradshaw.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. For your
safety, move to an interior room on the lowest floor of a sturdy
building. Stay away from windows.
When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.
&&
LAT...LON 3731 8037 3743 8024 3736 8006 3723 8017
TIME...MOT...LOC 1937Z 298DEG 7KT 3737 8021
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SH2 follow-up statements
624
WWUS51 KRNK 122003
SVSRNK
Severe Weather Statement
National Weather Service BLACKSBURG VA
403 PM EDT Thu Aug 12 2021
VAC045-121-161-122030-
/O.CON.KRNK.SV.W.0161.000000T0000Z-210812T2030Z/
Roanoke VA-Craig VA-Montgomery VA-
403 PM EDT Thu Aug 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FORNORTHWESTERN ROANOKE...SOUTH CENTRAL CRAIG AND NORTHEASTERN
MONTGOMERY COUNTIES...
At 402 PM EDT, a severe thunderstorm was located over Mc Donalds
Mill, or 7 miles south of Sinking Creek, moving south at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Mc Donalds Mill...
and Bradshaw.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for LARGE HAIL AND DAMAGING WINDS, as well as
deadly cloud to ground lightning. For your safety, move to an
interior room on the lowest floor of a sturdy building. Stay away
from windows.
Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning.
When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.
&&
LAT...LON 3731 8037 3741 8026 3733 8010 3724 8020
TIME...MOT...LOC 2002Z 348DEG 7KT 3732 8033
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ET689
WWUS51 KRNK 122021
SVSRNK
Severe Weather Statement
National Weather Service BLACKSBURG VA
421 PM EDT Thu Aug 12 2021
VAC045-121-161-122031-
/O.EXP.KRNK.SV.W.0161.000000T0000Z-210812T2030Z/
Roanoke VA-Craig VA-Montgomery VA-
421 PM EDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR
NORTHWESTERN ROANOKE...SOUTH CENTRAL CRAIG AND NORTHEASTERN
MONTGOMERY COUNTIES WILL EXPIRE AT 430 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 3731 8037 3741 8026 3733 8010 3724 8020
TIME...MOT...LOC 2021Z 298DEG 7KT 3730 8029
$$
SHThe office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 9:54 AM EDT | Heat Advisory | RNK | Buckingham | 9 hr |
| Aug 12, 12:28 PM EDT | Special Weather Statement | RNK | Grayson | 32 min |
| Aug 12, 1:04 PM EDT | Special Weather Statement | RNK | Roanoke, City of Roanoke, City of Salem | 26 min |
| Aug 12, 1:17 PM EDT | Severe Thunderstorm Warning | RNK | Bedford, Franklin, Roanoke, City of Roanoke, City of Salem | 38 min |
| Aug 12, 1:30 PM EDT | Special Weather Statement | RNK | Alleghany | 30 min |
| Aug 12, 2:03 PM EDT | Special Weather Statement | RNK | City of Roanoke | 27 min |
| Aug 12, 2:09 PM EDT | Special Weather Statement | RNK | Pittsylvania | 36 min |
| Aug 12, 2:12 PM EDT | Severe Thunderstorm Warning | RNK | Bedford, Campbell, Franklin, Pittsylvania, Roanoke | 63 min |
| Aug 12, 2:15 PM EDT | Special Weather Statement | RNK | Alleghany, City of Covington | 30 min |
| Aug 12, 2:24 PM EDT | Special Weather Statement | RNK | Henry | 36 min |
| Aug 12, 2:57 PM EDT | Severe Thunderstorm Warning | RNK | Henry, Patrick | 51 min |
| Aug 12, 3:18 PM EDT | Severe Thunderstorm Warning | RNK | Franklin | 29 min |
| Aug 12, 3:27 PM EDT | Severe Thunderstorm Warning | RNK | Carroll, Wythe | 48 min |
| Aug 12, 3:34 PM EDT | Special Weather Statement | RNK | City of Lexington | 26 min |
| Aug 12, 3:43 PM EDT | Severe Thunderstorm Warning | RNK | Franklin | 32 min |
| Aug 12, 3:51 PM EDT | Special Weather Statement | RNK | Patrick | 24 min |
| Aug 12, 3:58 PM EDT | Severe Thunderstorm Warning | RNK | Patrick | 47 min |
| Aug 12, 4:14 PM EDT | Special Weather Statement | RNK | City of Salem | 31 min |
| Aug 12, 4:14 PM EDT | Special Weather Statement | RNK | City of Salem | 31 min |
| Aug 12, 4:16 PM EDT | Severe Thunderstorm Warning | RNK | Floyd, Patrick | 29 min |
| Aug 12, 4:20 PM EDT | Severe Thunderstorm Warning | RNK | Franklin, Roanoke | 27 min |
| Aug 12, 4:24 PM EDT | Special Weather Statement | RNK | Floyd | 36 min |
| Aug 12, 4:26 PM EDT | Special Weather Statement | RNK | Grayson | 34 min |
| Aug 12, 4:44 PM EDT | Special Weather Statement | RNK | City of Danville | 31 min |
| Aug 12, 4:49 PM EDT | Severe Thunderstorm Warning | RNK | Floyd, Franklin, Patrick | 35 min |
| Aug 12, 7:42 PM EDT | Heat Advisory | RNK | Appomattox, Buckingham, Campbell, Charlotte, City of Lynchburg | 23 hr |
Nearby
Severe Thunderstorm Warnings in Virginia, 2021Every severe thunderstorm warning 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.