Alert archive / Virginia / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 152, NWS Blacksburg, VA
NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 12, 2021, 1:17 PM EDT for 5 counties in Virginia. It was in force for 38 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 12, 2021, 1:17 PM EDT (17:17 UTC)
- Expired
- Aug 12, 2021, 1:55 PM EDT
- In force
- 38 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bedford County, VA, City of Roanoke, VA, City of Salem, VA, Franklin County, VA, Roanoke County, VA
The radar
The Roanoke radar (KFCX), 31 km from the middle of the area, began a volume at 17:18 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 12, 1:20 PM EDT | HAIL 0.25 | 3 Ese Glenvar, VA | PEA HAIL AND SMALL LIMBS DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 5.3 hours before the alert went out and 45 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.
145
WUUS51 KRNK 121717
SVRRNK
VAC019-067-161-770-775-121815-
/O.NEW.KRNK.SV.W.0152.210812T1717Z-210812T1815Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
117 PM EDT Thu Aug 12 2021
The National Weather Service in BLACKSBURG has issued a
* Severe Thunderstorm Warning for...
Central Roanoke County in west central Virginia...
The City of Salem in west central Virginia...
The City of Roanoke in west central Virginia...
Western Bedford County in south central Virginia...
North central Franklin County in west central Virginia...
* Until 215 PM EDT.
* At 117 PM EDT, a severe thunderstorm was located near Poages Mill,
or near Salem, moving southeast at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Roanoke...
Salem...
Vinton...
Boones Mill...
Stewartsville...
Bent Mountain...
and Glenvar.
This includes The following Locations The Salem Fairgrounds and
Roanoke Regional Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for 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 3703 7988 3719 8019 3723 8019 3724 8020
3735 8010 3733 7992 3728 7972
TIME...MOT...LOC 1717Z 302DEG 11KT 3724 8008
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ET2 follow-up statements
841
WWUS51 KRNK 121742
SVSRNK
Severe Weather Statement
National Weather Service BLACKSBURG VA
142 PM EDT Thu Aug 12 2021
VAC019-067-161-770-775-121815-
/O.CON.KRNK.SV.W.0152.000000T0000Z-210812T1815Z/
Roanoke VA-City of Salem VA-City of Roanoke VA-Bedford VA-
Franklin VA-
142 PM EDT Thu Aug 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR CENTRAL ROANOKE...WESTERN BEDFORD AND NORTH CENTRAL FRANKLIN
COUNTIES...THE CITY OF SALEM AND THE CITY OF ROANOKE...
At 141 PM EDT, a severe thunderstorm was located over Cave Spring, or
near Roanoke, moving southeast at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Roanoke...
Salem...
Vinton...
Boones Mill...
Stewartsville...
Bent Mountain...
and Poages Mill.
This includes The following Locations The Salem Fairgrounds and
Roanoke Regional Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for DAMAGING WINDS. For your safety, move to an
interior room on the lowest floor of a sturdy building. Stay away
from windows.
When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.
&&
LAT...LON 3703 7988 3719 8019 3723 8017 3735 8010
3733 7992 3728 7972
TIME...MOT...LOC 1741Z 302DEG 11KT 3720 8000
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ET721
WWUS51 KRNK 121755
SVSRNK
Severe Weather Statement
National Weather Service BLACKSBURG VA
155 PM EDT Thu Aug 12 2021
VAC019-067-161-770-775-121804-
/O.CAN.KRNK.SV.W.0152.000000T0000Z-210812T1815Z/
Roanoke VA-City of Salem VA-City of Roanoke VA-Bedford VA-
Franklin VA-
155 PM EDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR
CENTRAL ROANOKE...WESTERN BEDFORD AND NORTH CENTRAL FRANKLIN
COUNTIES...THE CITY OF SALEM AND THE CITY OF ROANOKE IS CANCELLED...
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 has been cancelled. However gusty winds and
heavy rain are still possible with multiple thunderstorms in the
area.
LAT...LON 3703 7988 3719 8019 3723 8017 3735 8010
3733 7992 3728 7972
TIME...MOT...LOC 1752Z 302DEG 11KT 3718 7995
$$
ETThe 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, 1:30 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, 3:37 PM EDT | Severe Thunderstorm Warning | RNK | Craig, Montgomery, Roanoke | 53 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.