Alert archive / Virginia / Tornado Warnings in 2021

Tornado Warning 32, NWS Baltimore/Washington

August 31, 20215 counties in Virginia

NWS Baltimore/Washington issued this tornado warning at Aug 31, 2021, 11:49 PM EDT for 5 counties in Virginia. It was in force for 15 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 31, 2021, 11:49 PM EDT (03:49 UTC)
Expired
Sep 1, 2021, 12:04 AM EDT
In force
15 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Albemarle County, VA, Augusta County, VA, City of Waynesboro, VA, Nelson County, VA, Rockingham County, VA

The radar

The Sterling radar (KLWX), 151 km from the middle of the area, began a volume at 03:53 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 31, 7:36 PM EDTTornado WatchSPC7 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 3.8 hours before the alert went out and 116 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 00:00Z on 2021-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 319 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 00:00Z on 2021-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.193958Sfc1 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
319 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.9

Open this sounding in Storm Lab

The text

As transmitted.

799 
WFUS51 KLWX 010349
TORLWX
VAC003-015-125-165-820-010415-
/O.NEW.KLWX.TO.W.0032.210901T0349Z-210901T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
1149 PM EDT Tue Aug 31 2021

The National Weather Service in Sterling Virginia has issued a

* Tornado Warning for...
  Northern Nelson County in central Virginia...
  Southeastern Rockingham County in western Virginia...
  Northwestern Albemarle County in central Virginia...
  East central Augusta County in western Virginia...
  The eastern City of Waynesboro in western Virginia...

* Until 1215 AM EDT.
    
* At 1148 PM EDT, a severe thunderstorm capable of producing a
  tornado was located over Afton, or near Waynesboro, moving
  northeast at 30 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...For those in the direct path of a tornado touchdown, 
           flying debris will be dangerous to those caught without 
           shelter. Damage to roofs, siding, and windows may occur. 
           Mobile homes may be damaged or destroyed. Tree damage is 
           likely.

* This dangerous storm will be near...
  Crimora around 1200 AM EDT.

Other locations impacted by this tornadic thunderstorm include Afton
Mountain and Greenwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3798 7882 3802 7890 3825 7883 3819 7862
TIME...MOT...LOC 0348Z 205DEG 25KT 3804 7884 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

KLW
1 follow-up statement
764 
WWUS51 KLWX 010404
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
1204 AM EDT Wed Sep 1 2021

VAC003-015-125-165-820-010414-
/O.CAN.KLWX.TO.W.0032.000000T0000Z-210901T0415Z/
Nelson VA-Rockingham VA-Albemarle VA-Augusta VA-
City of Waynesboro VA-
1204 AM EDT Wed Sep 1 2021

...THE TORNADO WARNING FOR NORTHERN NELSON...SOUTHEASTERN
ROCKINGHAM...NORTHWESTERN ALBEMARLE...AND EAST CENTRAL AUGUSTA
COUNTIES AND THE EASTERN CITY OF WAYNESBORO IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 300 AM EDT for central and
western Virginia.

LAT...LON 3798 7882 3802 7890 3825 7883 3819 7862
TIME...MOT...LOC 0401Z 205DEG 25KT 3814 7878 

$$

KLW

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 31, 9:44 PM EDTRiver Flood WatchLWXLoudoun25 hr
Aug 31, 9:44 PM EDTRiver Flood WatchLWXLoudoun48 hr
Aug 31, 9:44 PM EDTRiver Flood WatchLWXFairfax, City of Fairfax25 hr
Aug 31, 10:29 PM EDTTornado WarningLWXAlbemarle17 min
Aug 31, 10:39 PM EDTTornado WarningLWXAlbemarle, Nelson36 min
Aug 31, 10:58 PM EDTTornado WarningLWXAlbemarle, Nelson32 min
Aug 31, 11:13 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Augusta, Nelson, City of Waynesboro47 min
Aug 31, 11:23 PM EDTTornado WarningLWXAlbemarle, City of Charlottesville37 min
Aug 31, 11:34 PM EDTAreal Flood WarningLWXAlbemarle, City of Charlottesville5 hr
Aug 31, 11:41 PM EDTFlash Flood Warning Considerable damage threatLWXAlbemarle, City of Charlottesville87 min
Aug 31, 11:56 PM EDTTornado WarningLWXAlbemarle34 min
Sep 1, 12:18 AM EDTSevere Thunderstorm WarningLWXCulpeper, Madison, Orange42 min
Sep 1, 12:25 AM EDTTornado WarningLWXCulpeper, Madison, Orange35 min
Sep 1, 12:53 AM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Orange52 min
Sep 1, 1:09 AM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Orange51 min
Sep 1, 1:42 AM EDTSevere Thunderstorm WarningLWXFauquier35 min
Sep 1, 2:25 AM EDTAreal Flood WarningLWXFairfax, Loudoun, Prince William, City of Manassas, City of Manassas Park11 hr
Sep 1, 2:34 AM EDTSevere Thunderstorm WarningLWXFairfax, City of Fairfax41 min
Sep 1, 2:52 AM EDTAreal Flood WarningLWXFairfax, City of Fairfax9 hr
Sep 1, 2:59 AM EDTSevere Thunderstorm WarningLWXArlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church46 min
Sep 1, 3:01 AM EDTFlash Flood Warning Considerable damage threatLWXFairfax, Prince William, City of Manassas Park2 hr
Sep 1, 3:08 AM EDTSpecial Marine WarningLWX67 min
Sep 1, 3:23 AM EDTAreal Flood WarningLWXArlington, Fairfax, City of Falls Church8 hr
Sep 1, 3:55 AM EDTSpecial Marine WarningLWX95 min
Sep 1, 4:34 AM EDTAreal Flood WarningLWXFairfax, Loudoun6 hr
Sep 1, 5:23 AM EDTSpecial Marine WarningLWX69 min
Sep 1, 11:42 AM EDTTornado WarningLWXCulpeper, Madison, Rappahannock12 min
Sep 1, 12:31 PM EDTAreal Flood WarningLWXPage, Rockingham, Shenandoah, Warren15 hr
Sep 1, 12:52 PM EDTSpecial Marine WarningLWX68 min
Sep 1, 12:55 PM EDTTornado WarningLWXKing George35 min
Sep 1, 1:23 PM EDTTornado WarningLWXKing George17 min
Sep 1, 1:30 PM EDTAreal Flood WarningLWXLoudoun27 hr
Sep 1, 2:05 PM EDTSpecial Marine WarningLWX55 min
Sep 1, 2:44 PM EDTSpecial Marine WarningLWX91 min
Sep 1, 2:48 PM EDTSpecial Marine WarningLWX87 min
Sep 1, 3:02 PM EDTSpecial Marine WarningLWX28 min
Sep 1, 3:28 PM EDTSmall Craft AdvisoryLWX44 hr
Sep 1, 3:36 PM EDTWind AdvisoryLWXGreene, Madison, Page, Rappahannock, Rockingham, Warren7 hr
Sep 1, 3:43 PM EDTSpecial Marine WarningLWX35 min
Sep 1, 4:52 PM EDTSpecial Marine WarningLWX23 min
Sep 1, 4:58 PM EDTSpecial Marine WarningLWX31 min

Nearby

Tornado Warnings in Virginia, 2021Every tornado warning in 2021Tornadoes 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.