Alert archive / Virginia / Special Weather Statements in 2021

Special Weather Statement, NWS Blacksburg, VA

August 29, 2021Alleghany County, Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 29, 2021, 2:21 PM EDT for Alleghany County, Virginia. It was in force for 24 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 29, 2021, 2:21 PM EDT (18:21 UTC)
Expired
Aug 29, 2021, 2:45 PM EDT
In force
24 min
Issued by
NWS Blacksburg, VA
Hail
0.00 in
Wind
30

County Alleghany County, VA

The radar

The Roanoke radar (KFCX), 112 km from the middle of the area, began a volume at 18:25 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, 6.4 hours before the alert went out and 100 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.

785 
WWUS81 KRNK 291821
SPSRNK

Special Weather Statement
National Weather Service BLACKSBURG VA
221 PM EDT Sun Aug 29 2021
 
VAZ019-020-WVZ507-291845-
Bath VA-Alleghany VA-Eastern Greenbrier WV-
221 PM EDT Sun Aug 29 2021

...A strong thunderstorm will impact portions of 
north central Alleghany, southwestern Bath Counties in west central
Virginia and east central Greenbrier Counties in southeastern West
Virginia through 245 PM EDT...

At 221 PM EDT, Doppler radar was tracking a strong thunderstorm over
Neola, moving east at 25 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Clifton Forge...
Neola...
Warm Springs...
Hot Springs...
Lake Moomaw...
Douthat State Park...
and Ingalls Field.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 3805 7975 3781 7980 3791 8025 3804 8021
      3804 8016 3806 8011 3806 7998 3807 7996
TIME...MOT...LOC 1821Z 274DEG 21KT 3797 8014 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

$$

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, 2:50 PM EDTSevere Thunderstorm WarningRNKBath, Rockbridge55 min
Aug 29, 3:23 PM EDTSevere Thunderstorm WarningRNKAlleghany, Bath, Botetourt67 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
Aug 29, 12:54 PM EDTSpecial Weather StatementRNKGreenbrier36 min
Aug 29, 12:57 PM EDTSpecial Weather StatementRNKSummers33 min
Aug 29, 1:31 PM EDTSpecial Weather StatementRNKSummers29 min
Aug 29, 5:25 PM EDTSpecial Weather StatementRNKMonroe35 min
Aug 29, 5:34 PM EDTSpecial Weather StatementRNKGreenbrier26 min
Aug 29, 6:06 PM EDTSpecial Weather StatementRNKSummers24 min
Aug 29, 6:20 PM EDTSpecial Weather StatementRNKSummers25 min
Aug 29, 6:44 PM EDTSpecial Weather StatementRNKMonroe31 min
Aug 29, 6:48 PM EDTSpecial Weather StatementRNKSummers27 min

Nearby

Special Weather Statements in Virginia, 2021Every special weather statement 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.