Alert archive / Virginia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 237, NWS Wakefield, VA

July 26, 2009Accomack County, Northampton County, Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Jul 26, 2009, 10:44 PM EDT for Accomack County, Northampton County, Virginia. It was in force for 61 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 26, 2009, 10:44 PM EDT (02:44 UTC)
Expired: Jul 26, 2009, 11:45 PM EDT
In force: 61 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon

Counties Accomack County, VA, Northampton County, VA

The radar

The Norfolk radar (KAKQ), 120 km from the middle of the area, began a volume at 02:47 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, 2.7 hours before the alert went out and 208 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: 332 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1314 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

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 26, 8:26 PM EDT, 2 hours 18 minutes earlier.

Area forecast discussion, Jul 26, 8:26 PM EDT, 2 hours 18 minutes before

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Hazardous weather outlook, Jul 26, 10:18 PM EDT, 26 minutes before

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In the hours before

Local storm report, Jul 26, 8:25 PM EDT, 2 hours 19 minutes before

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Local storm report, Jul 26, 8:27 PM EDT, 2 hours 17 minutes before

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Local storm report, Jul 26, 8:40 PM EDT, 2 hours 4 minutes before

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Local storm report, Jul 26, 8:44 PM EDT, 2 hours before

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Local storm report, Jul 26, 9:55 PM EDT, 49 minutes before

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Special weather statement, Jul 26, 10:17 PM EDT, 27 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
Jul 26, 8:15 PM EDT	Special Marine Warning	AKQ		60 min
Jul 26, 8:18 PM EDT	Special Marine Warning	AKQ		57 min
Jul 26, 9:08 PM EDT	Severe Thunderstorm Warning	AKQ	Gloucester, Mathews, York	52 min
Jul 26, 9:33 PM EDT	Special Marine Warning	AKQ		87 min
Jul 26, 10:40 PM EDT	Areal Flood Advisory	AKQ	Gloucester, Mathews, York	2 hr
Jul 26, 10:56 PM EDT	Special Marine Warning	AKQ		94 min
Jul 26, 11:27 PM EDT	Flash Flood Warning	AKQ	Gloucester, Mathews	3 hr
Jul 27, 12:28 AM EDT	Special Marine Warning	AKQ		62 min
Jul 27, 12:32 AM EDT	Special Marine Warning	AKQ		58 min
Jul 27, 1:10 PM EDT	Small Craft Advisory	AKQ		14 hr
Jul 27, 2:47 PM EDT	Severe Thunderstorm Warning	AKQ	Dinwiddie, Prince George, Surry, Sussex	58 min
Jul 27, 2:48 PM EDT	Special Marine Warning	AKQ		117 min
Jul 27, 2:56 PM EDT	Severe Thunderstorm Warning	AKQ	Brunswick, Mecklenburg	64 min
Jul 27, 3:09 PM EDT	Special Marine Warning	AKQ		2 hr
Jul 27, 3:17 PM EDT	Special Marine Warning	AKQ		118 min
Jul 27, 3:20 PM EDT	Severe Thunderstorm Warning	AKQ	Brunswick, Dinwiddie, Greensville, Sussex	55 min
Jul 27, 3:24 PM EDT	Severe Thunderstorm Warning	AKQ	City of Chesapeake, City of Suffolk	34 min
Jul 27, 3:43 PM EDT	Severe Thunderstorm Warning	AKQ	Chesterfield, Dinwiddie, Prince George, City of Colonial Heights, City of Hopewell, City of Petersburg	38 min
Jul 27, 3:46 PM EDT	Special Marine Warning	AKQ		119 min
Jul 27, 3:49 PM EDT	Severe Thunderstorm Warning	AKQ	City of Virginia Beach	41 min
Jul 27, 4:02 PM EDT	Severe Thunderstorm Warning	AKQ	Charles City, Prince George, Surry, Sussex	43 min
Jul 27, 4:09 PM EDT	Severe Thunderstorm Warning	AKQ	Accomack, Northampton	66 min
Jul 27, 4:28 PM EDT	Special Marine Warning	AKQ		2 hr
Jul 27, 4:28 PM EDT	Severe Thunderstorm Warning	AKQ	Isle of Wight, Southampton, Surry	47 min
Jul 27, 4:30 PM EDT	Flash Flood Warning	AKQ	Accomack	4 hr
Jul 27, 4:30 PM EDT	Severe Thunderstorm Warning	AKQ	Isle of Wight, Southampton, City of Franklin	45 min
Jul 27, 4:46 PM EDT	Severe Thunderstorm Warning	AKQ	City of Suffolk	59 min
Jul 27, 5:12 PM EDT	Special Marine Warning	AKQ		2 hr
Jul 27, 5:17 PM EDT	Flash Flood Warning	AKQ	Accomack	3 hr
Jul 27, 5:38 PM EDT	Special Marine Warning	AKQ		2 hr
Jul 27, 6:24 PM EDT	Flash Flood Warning	AKQ	Southampton, City of Franklin	3 hr
Jul 27, 2:37 PM EDT	Severe Thunderstorm Warning	AKQ	Chowan, Gates, Perquimans	25 min
Jul 27, 3:32 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	41 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2009 Every severe thunderstorm warning in 2009

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.