Alert archive / Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 367, NWS Baltimore/Washington

August 11, 2021Albemarle County, City of Charlottesville, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 11, 2021, 3:37 PM EDT for Albemarle County, City of Charlottesville, Virginia. It was in force for 53 min. 4 reports 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 11, 2021, 3:37 PM EDT (19:37 UTC)
Expired
Aug 11, 2021, 4:30 PM EDT
In force
53 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Albemarle County, VA, City of Charlottesville, VA

The radar

The Sterling radar (KLWX), 131 km from the middle of the area, began a volume at 19:40 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 11, 3:45 PM EDTTSTM WND DMG6 Ne Ivy, VASEVERAL REPORTS OF TREES DOWN JUST NORTHEAST OF IVY.
Aug 11, 4:10 PM EDTTSTM WND DMG3 S Stony Point, VAMULTIPLE REPORTS OF TREES AND WIRES BLOWN DOWN ACROSS NORTHEASTERN ALBEMARLE COUNTY.
Aug 11, 4:22 PM EDTTSTM WND DMG1 Sw Shadwell, VATREE BLEW DOWN ON A HOUSE CAUSING STRUCTURAL DAMAGE IN THE 2000 BLOCK OF HILLVIEW COURT.
Aug 11, 4:25 PM EDTTSTM WND DMG3 Se Keswick, VAA TREE BLEW DOWN ONTO I-64 AT MILE MARKER 133.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Aug 11, 2:02 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.6 hours before the alert went out and 134 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, Washington/Dulle, VA at 12:00Z on 2021-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 553 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, Washington/Dulle, VA at 12:00Z on 2021-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
553 J/kg
Mixed-layer CIN
-190 J/kg
Mixed-layer LCL
1301 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

484 
WUUS51 KLWX 111937
SVRLWX
VAC003-540-112030-
/O.NEW.KLWX.SV.W.0367.210811T1937Z-210811T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
337 PM EDT Wed Aug 11 2021

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  The City of Charlottesville in central Virginia...
  Central Albemarle County in central Virginia...

* Until 430 PM EDT.

* At 337 PM EDT, severe thunderstorms were located along a line
  extending from near Free Union to near Charlottesville, moving east
  at 10 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damaging winds will cause some trees and large branches 
           to fall. This could injure those outdoors, as well as 
           damage homes and vehicles. Roadways may become blocked by 
           downed trees. Localized power outages are possible. 
           Unsecured light objects may become projectiles.

* Locations impacted include...
  Charlottesville, Free Union, Campbell, Westmoreland, Hollymead,
  Ivy, Cobham, Cismont, Newcomb Hall, Boyd Tavern, Monticello,
  Woodridge, Keswick, Stony Point, Flordon, Carrsbrook, Earlysville,
  Shadwell, Barracks and Overton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3802 7871 3822 7849 3817 7833 3813 7821
      3806 7826 3787 7842
TIME...MOT...LOC 1937Z 287DEG 11KT 3816 7845 3806 7857 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DHOF
2 follow-up statements
875 
WWUS51 KLWX 112011
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
411 PM EDT Wed Aug 11 2021

VAC003-540-112030-
/O.CON.KLWX.SV.W.0367.000000T0000Z-210811T2030Z/
City of Charlottesville VA-Albemarle VA-
411 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR CENTRAL ALBEMARLE COUNTY AND THE CITY OF CHARLOTTESVILLE...

At 410 PM EDT, severe thunderstorms were located along a line
extending from 9 miles northwest of Boswells Tavern to
Charlottesville, moving east at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damaging winds will cause some trees and large branches to 
         fall. This could injure those outdoors, as well as damage 
         homes and vehicles. Roadways may become blocked by downed 
         trees. Localized power outages are possible. Unsecured 
         light objects may become projectiles.

Locations impacted include...
Charlottesville, Free Union, Campbell, Westmoreland, Hollymead, Ivy,
Cobham, Cismont, Newcomb Hall, Boyd Tavern, Monticello, Woodridge,
Keswick, Stony Point, Flordon, Carrsbrook, Earlysville, Shadwell,
Barracks and Overton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3802 7871 3822 7849 3817 7833 3813 7821
      3806 7826 3787 7842
TIME...MOT...LOC 2010Z 287DEG 11KT 3813 7833 3803 7845 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DHOF
825 
WWUS51 KLWX 112030
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
430 PM EDT Wed Aug 11 2021

VAC003-540-112040-
/O.EXP.KLWX.SV.W.0367.000000T0000Z-210811T2030Z/
City of Charlottesville VA-Albemarle VA-
430 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ALBEMARLE COUNTY AND
THE CITY OF CHARLOTTESVILLE HAS EXPIRED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
central Virginia.

LAT...LON 3802 7871 3822 7849 3817 7833 3813 7821
      3806 7826 3787 7842
TIME...MOT...LOC 2030Z 287DEG 11KT 3813 7831 3803 7843 

$$

KJP

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 8:37 PM EDTSpecial Marine WarningLWX59 min
Aug 11, 1:33 PM EDTSmall Craft AdvisoryLWX8 hr
Aug 11, 1:59 PM EDTSevere Thunderstorm WarningLWXFrederick, Shenandoah, Warren46 min
Aug 11, 2:06 PM EDTSevere Thunderstorm WarningLWXPage, Rockingham39 min
Aug 11, 2:11 PM EDTSevere Thunderstorm WarningLWXRockingham, City of Harrisonburg49 min
Aug 11, 2:26 PM EDTSevere Thunderstorm WarningLWXClarke, Frederick, Page, Shenandoah, Warren38 min
Aug 11, 2:44 PM EDTSevere Thunderstorm WarningLWXShenandoah46 min
Aug 11, 2:49 PM EDTSevere Thunderstorm Warning Considerable damage threatLWXClarke, Fauquier, Loudoun, Rappahannock, Warren41 min
Aug 11, 2:52 PM EDTSevere Thunderstorm WarningLWXGreene, Madison38 min
Aug 11, 2:53 PM EDTSevere Thunderstorm Warning Destructive damage threatLWXFauquier, Rappahannock39 min
Aug 11, 2:59 PM EDTSevere Thunderstorm WarningLWXLoudoun46 min
Aug 11, 3:18 PM EDTSevere Thunderstorm WarningLWXFauquier, Loudoun, Rappahannock42 min
Aug 11, 3:19 PM EDTSevere Thunderstorm WarningLWXShenandoah12 min
Aug 11, 3:25 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Madison, Rappahannock50 min
Aug 11, 3:42 PM EDTSevere Thunderstorm WarningLWXLoudoun48 min
Aug 11, 3:46 PM EDTSevere Thunderstorm WarningLWXFrederick, Shenandoah, City of Winchester25 min
Aug 11, 3:50 PM EDTSevere Thunderstorm WarningLWXCulpeper, Madison, Orange29 min
Aug 11, 4:01 PM EDTSpecial Marine WarningLWX119 min
Aug 11, 4:06 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier39 min
Aug 11, 4:20 PM EDTSevere Thunderstorm WarningLWXArlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church40 min
Aug 11, 4:28 PM EDTSpecial Marine WarningLWX2 hr
Aug 11, 4:38 PM EDTSpecial Marine WarningLWX2 hr
Aug 11, 4:38 PM EDTSevere Thunderstorm WarningLWXPrince William, Stafford41 min
Aug 11, 5:06 PM EDTSpecial Marine WarningLWX114 min
Aug 11, 5:24 PM EDTSevere Thunderstorm WarningLWXSpotsylvania36 min
Aug 11, 6:09 PM EDTSpecial Marine WarningLWX2 hr
Aug 11, 6:26 PM EDTSpecial Marine WarningLWX34 min
Aug 11, 6:45 PM EDTSpecial Marine WarningLWX34 min
Aug 11, 7:40 PM EDTSpecial Marine WarningLWX47 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.