Alert archive / Virginia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 200, NWS Wakefield, VA

August 1, 20116 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Aug 1, 2011, 9:03 PM EDT for 6 counties in Virginia. It was in force for 42 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: Aug 1, 2011, 9:03 PM EDT (01:03 UTC)
Expired: Aug 1, 2011, 9:45 PM EDT
In force: 42 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Caroline County, VA, Essex County, VA, King and Queen County, VA, Northumberland County, VA, Richmond County, VA, Westmoreland County, VA

The radar

The Norfolk radar (KAKQ), 107 km from the middle of the area, began a volume at 01:06 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 00:00Z, 1.1 hours before the alert went out and 122 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 644 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1789 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 Wakefield, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 7:22 PM EDT, 1 hour 41 minutes earlier.

Area forecast discussion, Aug 1, 7:22 PM EDT, 1 hour 41 minutes before

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Hazardous weather outlook, Aug 1, 12:29 PM EDT, 8 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WAKEFIELD VA
1229 PM EDT MON AUG 1 2011

MDZ021>025-021630-
DORCHESTER-WICOMICO-SOMERSET-INLAND WORCESTER-MARYLAND BEACHES-
1229 PM EDT MON AUG 1 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE LOWER EASTERN SHORE OF
MARYLAND.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS WILL BE POSSIBLE LATE THIS AFTERNOON INTO
EARLY THIS EVENING. ANY THUNDERSTORMS THAT DO DEVELOP WILL BE
CAPABLE OF PRODUCING GUSTY WINDS AND BRIEF HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING.

NCZ012>017-030>032-VAZ048-049-060>100-021630-
NORTHAMPTON NC-HERTFORD-GATES-PASQUOTANK-CAMDEN-INLAND CURRITUCK-
BERTIE-CHOWAN-PERQUIMANS-FLUVANNA-LOUISA-PRINCE EDWARD-CUMBERLAND-
GOOCHLAND-HANOVER-CAROLINE-MECKLENBURG-LUNENBURG-NOTTOWAY-AMELIA-
POWHATAN-CHESTERFIELD-HENRICO-KING WILLIAM-KING AND QUEEN-ESSEX-
WESTMORELAND-RICHMOND-NORTHUMBERLAND-LANCASTER-BRUNSWICK-DINWIDDIE-
PRINCE GEORGE-CHARLES CITY-NEW KENT-GLOUCESTER-MIDDLESEX-MATHEWS-
GREENSVILLE-SUSSEX-SURRY-JAMES CITY-YORK-SOUTHAMPTON-ISLE OF WIGHT-
NEWPORT NEWS/HAMPTON-NORFOLK/PORTSMOUTH-SUFFOLK-CHESAPEAKE-
VIRGINIA BEACH-ACCOMACK-NORTHAMPTON VA-
1229 PM EDT MON AUG 1 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR COASTAL NORTHEAST NORTH
CAROLINA...INTERIOR NORTHEAST NORTH CAROLINA...CENTRAL
VIRGINIA...EAST CENTRAL VIRGINIA...INTERIOR SOUTHEAST
VIRGINIA...SOUTH CENTRAL VIRGINIA...SOUTH HAMPTON ROADS
VIRGINIA...THE EASTERN SHORE OF VIRGINIA...THE MIDDLE PENINSULA OF
VIRGINIA...THE NORTHERN NECK OF VIRGINIA...THE PENINSULA OF
SOUTHEAST VIRGINIA AND THE PIEDMONT OF CENTRAL VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ630>634-650-652-654-656-658-021630-
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA-
CHESAPEAKE BAY FROM WINDMILL POINT TO NEW POINT COMFORT VA-
CHESAPEAKE BAY FROM NEW POINT COMFORT TO LITTLE CREEK VA-
CURRITUCK SOUND-
CHESAPEAKE BAY FROM LITTLE CREEK TO CAPE HENRY VA...INCLUDING THE
CHESAPEAKE BAY BRIDGE TUNNEL-
COASTAL WATERS FROM FENWICK ISLAND DE TO CHINCOTEAGUE VA OUT TO
20 NM-
COASTAL WATERS FROM CHINCOTEAGUE TO PARRAMORE ISLAND VA OUT TO 20 NM-
COASTAL WATERS FROM PARRAMORE ISLAND TO CAPE CHARLES LIGHT VA OUT TO
20 NM-
COASTAL WATERS FROM CAPE CHARLES LIGHT VA TO NC VA BORDER OUT TO
20 NM-
COASTAL WATERS FROM NC VA BORDER TO CURRITUCK BEACH LIGHT NC OUT TO
20 NM-
1229 PM EDT MON AUG 1 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL CHESAPEAKE
BAY...THE SOUTHERN CHESAPEAKE BAY...THE MID ATLANTIC COASTAL WATERS
AND CURRITUCK SOUND.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Aug 1, 7:04 PM EDT, 1 hour 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WAKEFIELD VA
704 PM EDT MON AUG 1 2011

MDZ021-020000-
DORCHESTER MD-
704 PM EDT MON AUG 1 2011

...STRONG THUNDERSTORM MOVING TOWARD DORCHESTER COUNTY...

AT 703 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 15 MILES NORTHWEST OF TAYLORS ISLAND...OR ABOUT 6
MILES EAST OF CHESAPEAKE BEACH...MOVING SOUTHEAST AT 20 MPH. THE
STRONG THUNDERSTORMS WILL BE NEAR HUDSON AT 730 PM EDT...LLOYDS AT
740 PM EDT...MADISON AT 745 PM EDT...WOOLFORD...AND...CHURCH CREEK AT
750 PM EDT.

WIND GUSTS UP TO 45 MPH...SMALL HAIL AND FREQUENT CLOUD TO GROUND
LIGHTNING ARE EXPECTED IN THE PATH OF THIS STORM. IF YOU HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE INTO
A SAFE SHELTER BEFORE THIS STORM REACHES YOUR AREA. REMAIN INDOORS
UNTIL THE STORM HAS PASSED.

LAT...LON 3860 7615 3860 7610 3848 7588 3827 7611
      3835 7619 3843 7631 3848 7635 3851 7634
      3851 7628 3853 7625 3853 7628 3857 7632
      3859 7628 3864 7629 3864 7623 3862 7622
      3864 7617

GINGRICH

Special weather statement, Aug 1, 7:48 PM EDT, 1 hour 15 minutes before

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Special weather statement, Aug 1, 7:59 PM EDT, 1 hour 4 minutes before

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Special weather statement, Aug 1, 8:14 PM EDT, 49 minutes before

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Local storm report, Aug 1, 8:47 PM EDT, 16 minutes before

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Special weather statement, Aug 1, 8:54 PM EDT, 9 minutes before

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The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 1, 8:54 PM EDT	Special Weather Statement	AKQ	King and Queen, King William, New Kent	36 min
Aug 1, 9:31 PM EDT	Special Weather Statement	AKQ	Middlesex	24 min
Aug 1, 9:44 PM EDT	Special Weather Statement	AKQ	Goochland, Powhatan	31 min
Aug 1, 10:01 PM EDT	Special Weather Statement	AKQ	Gloucester, Middlesex	29 min
Aug 1, 10:21 PM EDT	Special Marine Warning	AKQ		54 min
Aug 1, 10:32 PM EDT	Special Weather Statement	AKQ	Accomack, Northampton	43 min
Aug 1, 10:46 PM EDT	Special Weather Statement	AKQ	Chesterfield, Dinwiddie, Henrico, Prince George, Sussex, City of Colonial Heights and 3 more	59 min
Aug 1, 10:53 PM EDT	Special Marine Warning	AKQ		97 min
Aug 1, 11:15 PM EDT	Special Weather Statement	AKQ	Accomack, Northampton	30 min
Aug 1, 11:21 PM EDT	Severe Thunderstorm Warning	AKQ	Dinwiddie, Prince George, Surry, Sussex, City of Petersburg	24 min
Aug 1, 11:26 PM EDT	Special Marine Warning	AKQ		64 min
Aug 1, 11:32 PM EDT	Severe Thunderstorm Warning	AKQ	Accomack	28 min
Aug 1, 11:46 PM EDT	Special Weather Statement	AKQ	Prince George	44 min
Aug 1, 11:57 PM EDT	Special Weather Statement	AKQ	City of Emporia	33 min
Aug 1, 8:14 PM EDT	Special Weather Statement	AKQ	Dorchester	46 min
Aug 1, 10:35 PM EDT	Special Weather Statement	AKQ	Wicomico, Worcester	40 min
Aug 1, 11:01 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	29 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2011 Every 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.