Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 197, NWS Blacksburg, VA

August 29, 2021Alleghany County, Bath County, Botetourt County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 29, 2021, 3:23 PM EDT for Alleghany County, Bath County, Botetourt County, Virginia. It was in force for 67 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 29, 2021, 3:23 PM EDT (19:23 UTC)
Expired
Aug 29, 2021, 4:30 PM EDT
In force
67 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Alleghany County, VA, Bath County, VA, Botetourt County, VA

The radar

The Roanoke radar (KFCX), 103 km from the middle of the area, began a volume at 19:23 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

TimeReportWhereRemark
Aug 29, 3:36 PM EDTHAIL 0.72 S Natural Well, VA

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, 7.4 hours before the alert went out and 85 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.

Skew-T log-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2021-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 406 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2021-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
406 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
866 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

809 
WUUS51 KRNK 291923
SVRRNK
VAC005-017-023-292030-
/O.NEW.KRNK.SV.W.0197.210829T1923Z-210829T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
323 PM EDT Sun Aug 29 2021

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Northeastern Alleghany County in west central Virginia...
  Southwestern Bath County in west central Virginia...
  North central Botetourt County in west central Virginia...

* Until 430 PM EDT.

* At 323 PM EDT, a severe thunderstorm was located over Natural Well,
  or 8 miles north of Covington, moving east at 5 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...
  Clifton Forge...
  Iron Gate...
  Douthat State Park...
  Low Moor...
  Carloover...
  Glen Wilton...
  and Natural Well.

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 3793 7991 3789 7964 3771 7977 3790 8007
      3796 8003 3796 7995
TIME...MOT...LOC 1923Z 285DEG 6KT 3790 7997 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

VFJ
3 follow-up statements
028 
WWUS51 KRNK 291942
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
342 PM EDT Sun Aug 29 2021

VAC023-291952-
/O.CAN.KRNK.SV.W.0197.000000T0000Z-210829T2030Z/
Botetourt VA-
342 PM EDT Sun Aug 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTH CENTRAL BOTETOURT COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3790 7970 3777 7987 3790 8007 3796 7999
      3796 7995 3793 7991
TIME...MOT...LOC 1942Z 306DEG 4KT 3788 7996 

$$

VAC005-017-292030-
/O.CON.KRNK.SV.W.0197.000000T0000Z-210829T2030Z/
Alleghany VA-Bath VA-
342 PM EDT Sun Aug 29 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR
NORTHEASTERN ALLEGHANY AND SOUTHWESTERN BATH COUNTIES IN WEST CENTRAL
VIRGINIA...

At 342 PM EDT, a severe thunderstorm was located over Natural Well,
or near Covington, moving southeast at 5 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...
Clifton Forge...
Natural Well...
Douthat State Park...
Low Moor...
Carloover...
and Selma.

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 3790 7970 3777 7987 3790 8007 3796 7999
      3796 7995 3793 7991
TIME...MOT...LOC 1942Z 306DEG 4KT 3788 7996 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

VFJ
606 
WWUS51 KRNK 292012
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
412 PM EDT Sun Aug 29 2021

VAC005-017-292030-
/O.CON.KRNK.SV.W.0197.000000T0000Z-210829T2030Z/
Alleghany VA-Bath VA-
412 PM EDT Sun Aug 29 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR
NORTHEASTERN ALLEGHANY AND SOUTH CENTRAL BATH COUNTIES IN WEST
CENTRAL VIRGINIA...

At 411 PM EDT, a severe thunderstorm was located near Carloover, or
near Clifton Forge, moving east at 5 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...
Clifton Forge...
Douthat State Park...
Low Moor...
Carloover...
and Selma.

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 3790 7970 3777 7987 3785 8000 3793 7991
TIME...MOT...LOC 2011Z 285DEG 6KT 3787 7990 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

VFJ
173 
WWUS51 KRNK 292026
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
426 PM EDT Sun Aug 29 2021

VAC005-017-292035-
/O.EXP.KRNK.SV.W.0197.000000T0000Z-210829T2030Z/
Alleghany VA-Bath VA-
426 PM EDT Sun Aug 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR 
NORTHEASTERN ALLEGHANY AND SOUTH CENTRAL BATH COUNTIES IN WEST
CENTRAL VIRGINIA WILL EXPIRE AT 430 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for
east central Alleghany County and the City of Covington.

LAT...LON 3790 7970 3777 7987 3785 8000 3793 7991
TIME...MOT...LOC 2025Z 285DEG 6KT 3786 7987 

$$

VFJ

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 28, 9:01 PM EDTSpecial Weather StatementRNKRockbridge29 min
Aug 28, 9:33 PM EDTSpecial Weather StatementRNKCity of Buena Vista42 min
Aug 28, 10:22 PM EDTSpecial Weather StatementRNKBuckingham38 min
Aug 28, 10:28 PM EDTSpecial Weather StatementRNKCity of Buena Vista32 min
Aug 28, 10:57 PM EDTSpecial Weather StatementRNKRockbridge33 min
Aug 28, 11:05 PM EDTAreal Flood AdvisoryRNKRockbridge3 hr
Aug 28, 11:09 PM EDTSpecial Weather StatementRNKBuckingham36 min
Aug 28, 11:11 PM EDTSpecial Weather StatementRNKBuckingham49 min
Aug 28, 11:27 PM EDTSpecial Weather StatementRNKRockbridge48 min
Aug 28, 11:30 PM EDTSpecial Weather StatementRNKAppomattox30 min
Aug 28, 11:38 PM EDTAreal Flood AdvisoryRNKRockbridge3 hr
Aug 28, 11:44 PM EDTSevere Thunderstorm WarningRNKAmherst, Rockbridge43 min
Aug 28, 11:49 PM EDTFlash Flood WarningRNKAmherst, Rockbridge6 hr
Aug 28, 11:51 PM EDTSpecial Weather StatementRNKAmherst24 min
Aug 29, 12:02 AM EDTSpecial Weather StatementRNKAppomattox43 min
Aug 29, 12:05 AM EDTSpecial Weather StatementRNKBuckingham40 min
Aug 29, 12:07 AM EDTSevere Thunderstorm WarningRNKAmherst, Appomattox, Buckingham53 min
Aug 29, 12:23 AM EDTSpecial Weather StatementRNKAmherst37 min
Aug 29, 12:30 AM EDTSevere Thunderstorm WarningRNKAmherst, Bedford60 min
Aug 29, 12:39 AM EDTAreal Flood AdvisoryRNKAmherst, Appomattox, Bedford3 hr
Aug 29, 12:59 AM EDTSevere Thunderstorm WarningRNKAmherst, Appomattox61 min
Aug 29, 1:41 AM EDTSpecial Weather StatementRNKAppomattox34 min
Aug 29, 2:00 PM EDTSpecial Weather StatementRNKBath30 min
Aug 29, 2:18 PM EDTSpecial Weather StatementRNKBath27 min
Aug 29, 2:21 PM EDTSpecial Weather StatementRNKAlleghany24 min
Aug 29, 2:50 PM EDTSevere Thunderstorm WarningRNKBath, Rockbridge55 min
Aug 29, 3:39 PM EDTSevere Thunderstorm WarningRNKBath, Rockbridge51 min
Aug 29, 3:48 PM EDTSpecial Weather StatementRNKAlleghany, City of Covington27 min
Aug 29, 4:01 PM EDTSevere Thunderstorm WarningRNKAlleghany, Botetourt, City of Covington44 min
Aug 29, 4:19 PM EDTSpecial Weather StatementRNKRockbridge, City of Lexington26 min
Aug 29, 4:33 PM EDTSpecial Weather StatementRNKCity of Covington27 min
Aug 29, 4:42 PM EDTSevere Thunderstorm WarningRNKAlleghany, Botetourt, Craig44 min
Aug 29, 5:24 PM EDTSpecial Weather StatementRNKGiles36 min
Aug 29, 5:30 PM EDTSpecial Weather StatementRNKMontgomery30 min
Aug 29, 6:03 PM EDTSpecial Weather StatementRNKMontgomery27 min
Aug 29, 6:11 PM EDTSpecial Weather StatementRNKGiles19 min
Aug 29, 6:17 PM EDTSpecial Weather StatementRNKGiles28 min
Aug 29, 6:41 PM EDTSpecial Weather StatementRNKMontgomery, City of Radford34 min
Aug 29, 6:42 PM EDTSpecial Weather StatementRNKCity of Roanoke, City of Salem33 min
Aug 29, 6:57 PM EDTAreal Flood AdvisoryRNKMontgomery3 hr
Aug 29, 7:02 PM EDTSevere Thunderstorm WarningRNKGiles27 min
Aug 29, 7:03 PM EDTAreal Flood AdvisoryRNKRoanoke, City of Roanoke, City of Salem117 min
Aug 29, 7:16 PM EDTSpecial Weather StatementRNKFloyd, Montgomery, Roanoke, City of Roanoke, City of Salem44 min
Aug 29, 7:40 PM EDTSpecial Weather StatementRNKAlleghany, City of Covington35 min
Aug 29, 7:55 PM EDTSpecial Weather StatementRNKFloyd35 min

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.