Alert archive / Virginia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 27, NWS Wakefield, VA

April 12, 200810 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Apr 12, 2008, 11:29 AM EDT for 10 counties in Virginia. It was in force for 46 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 12, 2008, 11:29 AM EDT (15:29 UTC)
Expired: Apr 12, 2008, 12:15 PM EDT
In force: 46 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon

Counties Charles City County, VA, Chesterfield County, VA, City of Colonial Heights, VA, City of Hopewell, VA, City of Petersburg, VA, Dinwiddie County, VA, New Kent County, VA, Prince George County, VA, Surry County, VA, Sussex County, VA

The radar

The Norfolk radar (KAKQ), 36 km from the middle of the area, began a volume at 15:30 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 12:00Z, 3.5 hours before the alert went out and 197 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1230 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 332 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Apr 12, 4:11 AM EDT, 7 hours 18 minutes earlier.

Area forecast discussion, Apr 12, 4:11 AM EDT, 7 hours 18 minutes before

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Hazardous weather outlook, Apr 12, 4:47 AM EDT, 6 hours 42 minutes before

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In the hours before

Special weather statement, Apr 12, 10:21 AM EDT, 1 hour 8 minutes before

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Special weather statement, Apr 12, 11:14 AM EDT, 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WAKEFIELD VA
1114 AM EDT SAT APR 12 2008

VAZ063-064-067-068-070>078-080-082-083-085-121615-
AMELIA VA-CAROLINE VA-CHARLES CITY VA-CHESTERFIELD VA-DINWIDDIE
VA-ESSEX VA-HANOVER VA-HENRICO VA-KING AND QUEEN VA-KING WILLIAM
VA-LANCASTER VA-MIDDLESEX VA-NEW KENT VA-NORTHUMBERLAND VA-NOTTOWAY
VA-RICHMOND VA-WESTMORELAND VA-
1114 AM EDT SAT APR 12 2008

...STRONG THUNDERSTORMS MOVING INTO CENTRAL VIRIGNIA...

AT 1114 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS FROM ASHLAND TO 15 MILES SOUTHWEST OF
MANNBORO...OR FROM ASHLAND TO BLACKSTONE...MOVING NORTHEAST AT 75
MPH. THE STRONG THUNDERSTORMS WILL BE NEAR...
  MANGOHICK AROUND 1120 AM EDT...
  BEULAHVILLE AROUND 1125 AM EDT...
  DOWNTOWN RICHMOND AROUND 1125 AM EDT...
  OWENTON AROUND 1130 AM EDT...
  MOUNT LANDING AROUND 1135 AM EDT...
  NAYLORS BEACH AROUND 1140 AM EDT...
  ETHEL AROUND 1145 AM EDT...

WIND GUSTS TO 50 MPH...SMALL HAIL AND FREQUENT CLOUD TO
GROUND LIGHTNING ARE EXPECTED 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.

ALB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 11:06 AM EDT	Severe Thunderstorm Warning	AKQ	Amelia, Brunswick, Dinwiddie, Lunenburg, Mecklenburg, Nottoway	39 min
Apr 12, 12:20 PM EDT	Special Marine Warning	AKQ		85 min
Apr 12, 3:36 PM EDT	Special Marine Warning	AKQ		54 min
Apr 12, 4:36 PM EDT	Special Marine Warning	AKQ		39 min
Apr 12, 5:17 PM EDT	Special Marine Warning	AKQ		43 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2008 Every 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.