Alert archive / Virginia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 116, NWS Baltimore/Washington

May 22, 2011Augusta County, City of Staunton, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at May 22, 2011, 10:23 PM EDT for Augusta County, City of Staunton, Virginia. It was in force for 52 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
May 22, 2011, 10:23 PM EDT (02:23 UTC)
Expired
May 22, 2011, 11:15 PM EDT
In force
52 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon

Counties Augusta County, VA, City of Staunton, VA

The radar

The Roanoke radar (KFCX), 163 km from the middle of the area, began a volume at 02:26 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 00:00Z, 2.4 hours before the alert went out and 112 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 2011-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 69 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 00:00Z on 2011-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.19395878Sfc1 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
69 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
2383 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at May 22, 9:41 PM EDT, 42 minutes earlier.

Area forecast discussion, May 22, 9:41 PM EDT, 42 minutes before
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Hazardous weather outlook, May 22, 8:54 PM EDT, 1 hour 29 minutes before
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In the hours before

Special weather statement, May 22, 8:10 PM EDT, 2 hours 13 minutes before
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Special weather statement, May 22, 9:19 PM EDT, 1 hour 4 minutes before
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Special weather statement, May 22, 9:58 PM EDT, 25 minutes before
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Special weather statement, May 22, 10:01 PM EDT, 22 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 22, 8:10 PM EDTSpecial Weather StatementLWXCity of Harrisonburg35 min
May 22, 9:19 PM EDTSpecial Weather StatementLWXShenandoah26 min
May 22, 9:58 PM EDTSpecial Weather StatementLWXShenandoah32 min
May 22, 10:01 PM EDTSpecial Weather StatementLWXAugusta, Highland44 min
May 22, 10:27 PM EDTSpecial Weather StatementLWXShenandoah, Warren48 min
May 22, 10:31 PM EDTSevere Thunderstorm WarningLWXHighland44 min
May 22, 10:49 PM EDTSpecial Weather StatementLWXRockingham, City of Harrisonburg41 min
May 22, 10:57 PM EDTSpecial Weather StatementLWXNelson48 min
May 22, 11:11 PM EDTSevere Thunderstorm WarningLWXAugusta, Rockingham, City of Harrisonburg49 min
May 22, 11:38 PM EDTSpecial Weather StatementLWXCity of Charlottesville37 min
May 23, 12:09 AM EDTSpecial Weather StatementLWXPage36 min
May 23, 12:13 AM EDTSpecial Weather StatementLWXFrederick32 min
May 23, 1:23 AM EDTSpecial Weather StatementLWXLoudoun37 min
May 23, 1:33 AM EDTSpecial Weather StatementLWXFairfax, Prince William, City of Fairfax, City of Manassas, City of Manassas Park27 min
May 23, 6:34 AM EDTCoastal Flood AdvisoryLWXArlington, Fairfax, King George, Stafford, City of Alexandria, City of Fairfax and 1 more29 hr
May 23, 3:18 PM EDTSpecial Weather StatementLWXFrederick42 min
May 23, 3:20 PM EDTSpecial Weather StatementLWXShenandoah40 min
May 23, 3:42 PM EDTSevere Thunderstorm WarningLWXFrederick31 min
May 23, 3:53 PM EDTSpecial Weather StatementLWXClarke, Frederick, City of Winchester52 min
May 23, 3:58 PM EDTSpecial Weather StatementLWXShenandoah, Warren47 min
May 23, 4:24 PM EDTSevere Thunderstorm WarningLWXClarke, Frederick, Loudoun51 min
May 23, 4:45 PM EDTSevere Thunderstorm WarningLWXCulpeper, Madison, Orange45 min
May 23, 5:12 PM EDTSevere Thunderstorm WarningLWXLoudoun48 min
May 23, 5:32 PM EDTSpecial Weather StatementLWXCulpeper28 min
May 23, 5:50 PM EDTSpecial Marine WarningLWX57 min
May 23, 6:18 PM EDTSpecial Marine WarningLWX40 min
May 23, 6:45 PM EDTSevere Thunderstorm WarningLWXNelson45 min
May 23, 12:15 AM EDTSpecial Weather StatementLWXAllegany75 min
May 23, 2:00 AM EDTSpecial Weather StatementLWXMontgomery30 min
May 23, 4:37 PM EDTSpecial Weather StatementLWXWashington23 min
May 23, 5:36 PM EDTSpecial Weather StatementLWXCarroll24 min
May 23, 5:39 PM EDTSpecial Weather StatementLWXBaltimore51 min
May 23, 5:57 PM EDTSpecial Weather StatementLWXMontgomery48 min
May 23, 6:13 PM EDTSevere Thunderstorm WarningLWXHoward, Montgomery, Prince George's47 min
May 22, 11:14 PM EDTSpecial Weather StatementLWXGrant, Hardy, Pendleton46 min
May 23, 3:05 PM EDTSpecial Weather StatementLWXHampshire25 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2011Every severe thunderstorm warning in 2011

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.