Alert archive / Maryland / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 266, NWS Wakefield, VA

August 10, 2008Accomack County, Virginia; Somerset County, Worcester County, Maryland

NWS Wakefield, VA issued this severe thunderstorm warning at Aug 10, 2008, 7:46 PM EDT for Accomack County, Virginia; Somerset County, Worcester County, Maryland. It was in force for 59 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 10, 2008, 7:46 PM EDT (23:46 UTC)
Expired: Aug 10, 2008, 8:45 PM EDT
In force: 59 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon

Counties Somerset County, MD, Worcester County, MD, Accomack County, VA

The radar

The Dover AFB radar (KDOX), 91 km from the middle of the area, began a volume at 23:46 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 10, 1:36 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.8 hours before the alert went out and 23 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: 2296 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.9

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 10, 6:41 PM EDT, 1 hour 5 minutes earlier.

Area forecast discussion, Aug 10, 6:41 PM EDT, 1 hour 5 minutes before

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Hazardous weather outlook, Aug 10, 7:44 PM EDT, 2 minutes before

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In the hours before

Local storm report, Aug 10, 6:40 PM EDT, 1 hour 6 minutes before

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Special weather statement, Aug 10, 6:45 PM EDT, 1 hour 1 minute before

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Special weather statement, Aug 10, 6:56 PM EDT, 50 minutes before

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Special weather statement, Aug 10, 6:58 PM EDT, 48 minutes before

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Special weather statement, Aug 10, 7:21 PM EDT, 25 minutes before

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Local storm report, Aug 10, 7:31 PM EDT, 15 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 10, 3:49 AM EDT	Small Craft Advisory	AKQ		24 hr
Aug 10, 12:05 PM EDT	Special Marine Warning	AKQ		55 min
Aug 10, 12:35 PM EDT	Special Marine Warning	AKQ		85 min
Aug 10, 12:45 PM EDT	Special Marine Warning	AKQ		60 min
Aug 10, 12:54 PM EDT	Special Marine Warning	AKQ		51 min
Aug 10, 12:58 PM EDT	Special Marine Warning	AKQ		92 min
Aug 10, 1:49 PM EDT	Special Marine Warning	AKQ		116 min
Aug 10, 1:51 PM EDT	Special Marine Warning	AKQ		54 min
Aug 10, 2:04 PM EDT	Special Marine Warning	AKQ		86 min
Aug 10, 2:33 PM EDT	Special Marine Warning	AKQ		57 min
Aug 10, 5:59 PM EDT	Severe Thunderstorm Warning	AKQ	Essex, Richmond, Westmoreland	46 min
Aug 10, 6:15 PM EDT	Severe Thunderstorm Warning	AKQ	Westmoreland	45 min
Aug 10, 6:21 PM EDT	Severe Thunderstorm Warning	AKQ	Hanover, King and Queen, King William, New Kent	39 min
Aug 10, 6:29 PM EDT	Severe Thunderstorm Warning	AKQ	Northumberland, Richmond, Westmoreland	46 min
Aug 10, 6:49 PM EDT	Severe Thunderstorm Warning	AKQ	Essex, King and Queen, Lancaster, Middlesex, Richmond	24 min
Aug 10, 7:09 PM EDT	Special Marine Warning	AKQ		66 min
Aug 10, 7:23 PM EDT	Severe Thunderstorm Warning	AKQ	Chesterfield, Henrico, City of Colonial Heights, City of Hopewell	50 min
Aug 10, 7:53 PM EDT	Special Marine Warning	AKQ		97 min
Aug 10, 6:53 AM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	52 min
Aug 10, 7:03 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico	57 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2008 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.