Alert archive / Virginia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 33, NWS Baltimore/Washington

April 26, 2008Shenandoah County, Virginia; Hardy County, West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Apr 26, 2008, 1:54 PM EDT for Shenandoah County, Virginia; Hardy County, West Virginia. It was in force for 48 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
Apr 26, 2008, 1:54 PM EDT (17:54 UTC)
Expired
Apr 26, 2008, 2:42 PM EDT
In force
48 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon

Counties Shenandoah County, VA, Hardy County, WV

The radar

The Sterling radar (KLWX), 106 km from the middle of the area, began a volume at 17:54 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.9 hours before the alert went out and 114 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 2008-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 117 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 2008-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
117 J/kg
Mixed-layer CIN
-231 J/kg
Mixed-layer LCL
1156 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Apr 26, 10:57 AM EDT, 2 hours 57 minutes earlier.

Area forecast discussion, Apr 26, 10:57 AM EDT, 2 hours 57 minutes before
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Hazardous weather outlook, Apr 26, 10:13 AM EDT, 3 hours 41 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1013 AM EDT SAT APR 26 2008

ANZ530>537-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
271000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD-
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD-
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA-
DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-
CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
1013 AM EDT SAT APR 26 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE
CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN
CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF
COLUMBIA.

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT WILL MOVE THROUGH THE MID ATLANTIC REGION TODAY.
ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE DURING THE AFTERNOON
AND EVENING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A SECOND...AND STRONGER COLD FRONT...IS EXPECTED TO MOVE THROUGH
THE REGION ON MONDAY. THIS SYSTEM HAS THE POTENTIAL TO PRODUCE
HEAVY RAINFALL AND SEVERE THUNDERSTORMS. SMALL CRAFT ADVISORIES
ARE ALSO POSSIBLE MONDAY.

.SPOTTER INFORMATION STATEMENT...

WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY...BUT ANY
REPORTS OF DAMAGING WINDS OR HAIL SHOULD BE RELAYED IMMEDIATELY TO
THE NATIONAL WEATHER SERVICE.

MDZ003>005-009-010-501-502-VAZ021-025>031-036>042-050-051-
WVZ050>055-501>504-271000-
WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD-
EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-HIGHLAND-
AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-
NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-FAUQUIER-LOUDOUN-
ORANGE-CULPEPER-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-PENDLETON-
HARDY-WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-
1013 AM EDT SAT APR 26 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN WEST VIRGINIA...
NORTHERN AND CENTRAL VIRGINIA...AND CENTRAL AND WESTERN MARYLAND
WITH THE EXCEPTION OF GARRETT COUNTY.

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT WILL MOVE THROUGH THE MID ATLANTIC REGION TODAY.
ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE DURING THE AFTERNOON
AND EVENING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A SECOND...AND STRONGER COLD FRONT...IS EXPECTED TO MOVE THROUGH
THE REGION ON MONDAY. THIS SYSTEM HAS THE POTENTIAL TO PRODUCE
HEAVY RAINFALL AND SEVERE THUNDERSTORMS. PERIODS OF HEAVY RAIN MAY
TRIGGER FLOODING MONDAY AND MONDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY...BUT ANY
REPORTS OF DAMAGING WINDS OR HAIL SHOULD BE RELAYED IMMEDIATELY TO
THE NATIONAL WEATHER SERVICE.

In the hours before

Special weather statement, Apr 26, 12:23 PM EDT, 1 hour 31 minutes before
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Special weather statement, Apr 26, 1:11 PM EDT, 43 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 6:11 AM EDTDense Fog AdvisoryLWXClarke, Frederick, City of Winchester4 hr
Apr 26, 1:31 PM EDTSevere Thunderstorm WarningLWXAugusta, Rockingham, City of Harrisonburg44 min
Apr 26, 1:56 PM EDTSevere Thunderstorm WarningLWXFrederick64 min
Apr 26, 3:48 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Stafford42 min
Apr 26, 4:34 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Nelson, City of Charlottesville41 min
Apr 26, 4:16 PM EDTSevere Thunderstorm WarningLWXHampshire, Mineral44 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2008Severe Thunderstorm Warnings in West Virginia, 2008Every severe thunderstorm warning in 2008

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.