Alert archive / Virginia / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 652, NWS Baltimore/Washington

September 11, 2019Clarke County, Frederick County, City of Winchester, Virginia; Berkeley County, Jefferson County, West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Sep 11, 2019, 2:53 PM EDT for Clarke County, Frederick County, City of Winchester, Virginia; Berkeley County, Jefferson County, West Virginia. It was in force for 20 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 11, 2019, 2:53 PM EDT (18:53 UTC)
Expired
Sep 11, 2019, 3:13 PM EDT
In force
20 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties City of Winchester, VA, Clarke County, VA, Frederick County, VA, Berkeley County, WV, Jefferson County, WV

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.9 hours before the alert went out and 66 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 2019-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 113 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, Washington/Dulle, VA at 12:00Z on 2019-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 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
113 J/kg
Mixed-layer CIN
-301 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 11, 2:47 PM EDTSevere Thunderstorm WarningLWXPage, Shenandoah, Warren43 min
Sep 11, 2:57 PM EDTSevere Thunderstorm WarningLWXClarke, Frederick, Shenandoah, Warren, City of Winchester48 min
Sep 11, 3:23 PM EDTSevere Thunderstorm WarningLWXClarke, Fauquier, Loudoun, Warren52 min
Sep 11, 3:26 PM EDTSevere Thunderstorm WarningLWXPage, Rappahannock, Shenandoah, Warren49 min
Sep 11, 3:30 PM EDTSevere Thunderstorm WarningLWXLoudoun45 min
Sep 11, 3:31 PM EDTSevere Thunderstorm WarningLWXMadison, Page, Rappahannock, Shenandoah44 min
Sep 11, 3:46 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Page, Prince William, Rappahannock, Warren44 min
Sep 11, 3:48 PM EDTSevere Thunderstorm WarningLWXClarke, Fauquier, Loudoun, Prince William42 min
Sep 11, 4:11 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Page, Prince William, Rappahannock49 min
Sep 11, 4:25 PM EDTSpecial Marine WarningLWX65 min
Sep 11, 4:36 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Augusta, Nelson, City of Waynesboro39 min
Sep 11, 4:41 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Madison, Orange, Prince William, Stafford49 min
Sep 11, 4:47 PM EDTSpecial Marine WarningLWX118 min
Sep 11, 4:57 PM EDTSevere Thunderstorm WarningLWXArlington, Fairfax, Prince William, City of Alexandria, City of Fairfax, City of Falls Church and 2 more48 min
Sep 11, 5:01 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Augusta, Nelson, City of Charlottesville59 min
Sep 11, 5:08 PM EDTSevere Thunderstorm WarningLWXCulpeper, Madison, Rappahannock22 min
Sep 11, 5:22 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, King George, Orange, Prince William, Spotsylvania and 2 more53 min
Sep 11, 5:23 PM EDTSpecial Marine WarningLWX27 min
Sep 11, 5:28 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Greene, Madison, Orange47 min
Sep 11, 7:29 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Page, Rappahannock, Warren46 min
Sep 10, 10:29 PM EDTCoastal Flood AdvisoryLWXAnne Arundel6 hr

Nearby

Severe Thunderstorm Warnings in Virginia, 2019Severe Thunderstorm Warnings in West Virginia, 2019Every severe thunderstorm warning in 2019

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.