Alert archive / Virginia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 186, NWS Wakefield, VA

July 24, 20117 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Jul 24, 2011, 9:58 PM EDT for 7 counties in Virginia. It was in force for 47 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
Jul 24, 2011, 9:58 PM EDT (01:58 UTC)
Expired
Jul 24, 2011, 10:45 PM EDT
In force
47 min
Issued by
NWS Wakefield, VA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, Isle of Wight County, VA, Surry County, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 45 km from the middle of the area, began a volume at 02:01 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.0 hours before the alert went out and 138 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, Wallops Is Stn, VA at 00:00Z on 2011-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 817 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, Wallops Is Stn, VA at 00:00Z on 2011-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
817 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1408 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
1 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 Wakefield, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 24, 8:18 PM EDT, 1 hour 40 minutes earlier.

Area forecast discussion, Jul 24, 8:18 PM EDT, 1 hour 40 minutes before
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Hazardous weather outlook, Jul 24, 8:20 PM EDT, 1 hour 38 minutes before
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In the hours before

Special weather statement, Jul 24, 7:10 PM EDT, 2 hours 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WAKEFIELD VA
710 PM EDT SUN JUL 24 2011

NCZ013-014-030>032-242345-
BERTIE NC-CHOWAN NC-GATES NC-HERTFORD NC-PERQUIMANS NC-
710 PM EDT SUN JUL 24 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN BERTIE...
NORTHWESTERN CHOWAN...NORTHWESTERN PERQUIMANS...SOUTH CENTRAL GATES
AND SOUTHEASTERN HERTFORD COUNTIES...

AT 702 PM EDT...A STRONG THUNDERSTORM WAS NEAR HARRELLSVILLE...MOVING
NORTH AT 5 MPH.

* WIND GUSTS TO 30 MPH ARE POSSIBLE WITH THIS STORM.

* VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER
TO POND ON ROADS AND FILL POOR DRAINAGE AREAS. THE RAIN WILL CAUSE
RAPID RISES ON SMALL STREAMS AND CREEKS.

* THIS STORM WILL BE NEAR HARRELLSVILLE...CARTER AND RAYS BEACH.

LAT...LON 3622 7673 3623 7673 3622 7674 3626 7687
      3640 7686 3641 7661 3628 7653 3620 7669

DEROSA
Special weather statement, Jul 24, 7:21 PM EDT, 2 hours 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WAKEFIELD VA
721 PM EDT SUN JUL 24 2011

NCZ014>017-VAZ096>098-250015-
CAMDEN NC-CHESAPEAKE VA-GATES NC-PASQUOTANK NC-SUFFOLK VA-VIRGINIA
BEACH VA-WESTERN CURRITUCK NC-
721 PM EDT SUN JUL 24 2011

...STRONG THUNDERSTORMS OVER TIDEWATER AND NORTHEAST NORTH CAROLINA

AT 718 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS FROM CHESAPEAKE AIRPORT TO CURRITUCK...OR FROM
DEEP CREEK TO CURRITUCK...MOVING EAST AT 5 MPH.

EXPECT FREQUENT CLOUD TO GROUND LIGHTNING AND HEAVY RAINFALL WITH
THESE STORMS. PONDING OF WATER ON ROADWAYS AND FLOODING OF LOW LYING
AND FLOOD PRONE AREAS IS ALSO POSSIBLE. IF YOU HEAR THUNDER...YOU ARE
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE INTO A SAFE SHELTER
BEFORE THESE STORMS REACH YOUR AREA. REMAIN INDOORS UNTIL THE STORMS
HAVE PASSED.

LAT...LON 3651 7653 3676 7648 3679 7596 3671 7592
      3658 7591 3658 7593 3664 7597 3659 7598
      3657 7591 3647 7593 3648 7598 3655 7602
      3650 7603 3645 7600 3644 7593 3630 7595

LALEXAND
Special weather statement, Jul 24, 7:26 PM EDT, 2 hours 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WAKEFIELD VA
726 PM EDT SUN JUL 24 2011

VAZ060-061-065>068-079-080-087-092-250015-
AMELIA VA-BRUNSWICK VA-CUMBERLAND VA-DINWIDDIE VA-GREENSVILLE
VA-LUNENBURG VA-MECKLENBURG VA-NOTTOWAY VA-PRINCE EDWARD
VA-SOUTHAMPTON VA-
726 PM EDT SUN JUL 24 2011

...SLOW MOVING THUNDERSTORMS CONTINUE TO EXPAND ACROSS PORTIONS OF
CENTRAL VIRGINIA WEST OF I-95...

AT 721 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SEVERAL CLUSTERS OF THUNDERSTORM ACROSS MANY PORTIONS OF CENTRAL
VIRGINIA WEST OF I-95. THE STORMS WERE MOVING TO THE SOUTHEAST
AROUND 20 MPH...AND WILL REACH ALBERTA AT 730 PM EDT...ORDSBURG AT
735 PM EDT...DOLPHIN AT 745 PM EDT...WARFIELD AT 750 PM EDT...AND
CALLAVILLE AT 805 PM EDT.

WIND GUSTS OF 40 TO 50 MPH ARE ANTICIPATED UNDERNEATH THE STRONGEST
STORMS...MOST LIKELY AS THE STORMS ARE MOVING IN.

EXPECT FREQUENT CLOUD TO GROUND LIGHTNING IN THE PATH OF THESE
STORMS. IF YOU HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. MOVE INTO A SAFE SHELTER BEFORE THESE STORMS REACH YOUR
AREA. REMAIN INDOORS UNTIL THE STORMS HAVE PASSED.

IN ADDITION...RAINFALL RATES OF 1 TO AS MUCH AS 3 INCHES PER HOUR
WILL CAUSE PONDING OF WATER ON ROADWAYS...AND POSSIBLE LOCALIZED
FLOODING IN LOW LYING AND FLOOD PRONE AREAS.

LAT...LON 3734 7848 3735 7846 3741 7842 3740 7822
      3725 7790 3710 7805 3690 7773 3655 7735
      3654 7809 3704 7847 3708 7846 3709 7850
      3716 7856

BHURLEY
Local storm report, Jul 24, 8:30 PM EDT, 1 hour 28 minutes before
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Local storm report, Jul 24, 8:50 PM EDT, 1 hour 8 minutes before
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Special weather statement, Jul 24, 9:52 PM EDT, 6 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 8:14 PM EDTSpecial Marine WarningAKQ61 min
Jul 24, 9:52 PM EDTSpecial Weather StatementAKQIsle of Wight, Surry, York, City of Chesapeake, City of Hampton, City of Newport News and 5 more53 min
Jul 24, 10:04 PM EDTSpecial Marine WarningAKQ56 min
Jul 25, 4:01 PM EDTSpecial Weather StatementAKQCumberland, Prince Edward59 min
Jul 25, 4:08 PM EDTSpecial Weather StatementAKQKing George52 min
Jul 25, 4:34 PM EDTSevere Thunderstorm WarningAKQCaroline, Essex, King and Queen, King William, Richmond, Westmoreland41 min
Jul 25, 4:50 PM EDTSpecial Weather StatementAKQMecklenburg70 min
Jul 25, 4:59 PM EDTSpecial Weather StatementAKQPrince Edward61 min
Jul 25, 5:01 PM EDTSpecial Weather StatementAKQWestmoreland59 min
Jul 25, 5:15 PM EDTSevere Thunderstorm WarningAKQEssex, King and Queen, Lancaster, Middlesex, Northumberland, Richmond45 min
Jul 25, 5:33 PM EDTSpecial Marine WarningAKQ117 min
Jul 25, 5:35 PM EDTSpecial Weather StatementAKQLunenburg, Nottoway40 min
Jul 25, 5:49 PM EDTSpecial Weather StatementAKQLancaster, Middlesex, Northumberland41 min
Jul 25, 5:50 PM EDTSpecial Weather StatementAKQDinwiddie40 min
Jul 25, 5:56 PM EDTSevere Thunderstorm WarningAKQBrunswick, Mecklenburg49 min
Jul 25, 6:21 PM EDTSevere Thunderstorm WarningAKQGloucester, King and Queen, Lancaster, Mathews, Middlesex39 min
Jul 25, 6:31 PM EDTSevere Thunderstorm WarningAKQBrunswick, Greensville, Southampton, Sussex, City of Emporia44 min
Jul 25, 6:32 PM EDTSevere Thunderstorm WarningAKQDinwiddie, Prince George, Sussex, City of Petersburg43 min
Jul 25, 7:04 PM EDTSpecial Weather StatementAKQCharles City, Henrico41 min
Jul 25, 7:11 PM EDTSevere Thunderstorm WarningAKQCharles City, Gloucester, Isle of Wight, James City, New Kent, Surry and 3 more49 min
Jul 25, 7:21 PM EDTSevere Thunderstorm WarningAKQSouthampton, Surry, Sussex39 min
Jul 25, 7:26 PM EDTSpecial Weather StatementAKQPrince George49 min
Jul 25, 7:32 PM EDTSpecial Marine WarningAKQ118 min
Jul 25, 7:49 PM EDTSpecial Weather StatementAKQCity of Hampton, City of Norfolk41 min
Jul 25, 7:58 PM EDTSevere Thunderstorm WarningAKQIsle of Wight, James City, Southampton, Surry, Sussex, York and 2 more62 min
Jul 25, 6:28 PM EDTSpecial Weather StatementAKQCamden, Chowan, Gates, Pasquotank, Perquimans62 min
Jul 25, 2:16 AM EDTSpecial Weather StatementAKQDorchester44 min
Jul 25, 2:45 AM EDTSpecial Weather StatementAKQWicomico60 min
Jul 25, 4:28 PM EDTSpecial Weather StatementAKQWicomico62 min
Jul 25, 4:50 PM EDTAreal Flood AdvisoryAKQWicomico100 min
Jul 25, 6:04 PM EDTSpecial Weather StatementAKQSomerset26 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.