Alert archive / Virginia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 86, NWS Wakefield, VA

August 10, 20138 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Aug 10, 2013, 1:15 PM EDT for 8 counties in Virginia. It was in force for 45 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, 2013, 1:15 PM EDT (17:15 UTC)
Expired: Aug 10, 2013, 2:00 PM EDT
In force: 45 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Chesterfield County, VA, City of Richmond, VA, Goochland County, VA, Hanover County, VA, Henrico County, VA, King William County, VA, Louisa County, VA, Powhatan County, VA

The radar

The Norfolk radar (KAKQ), 89 km from the middle of the area, began a volume at 17:18 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, 5.3 hours before the alert went out and 176 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: 536 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 640 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 25 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 Aug 10, 11:04 AM EDT, 2 hours 11 minutes earlier.

Area forecast discussion, Aug 10, 11:04 AM EDT, 2 hours 11 minutes before

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Hazardous weather outlook, Aug 10, 4:27 AM EDT, 8 hours 48 minutes before

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In the hours before

Special weather statement, Aug 10, 11:30 AM EDT, 1 hour 45 minutes before

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Special weather statement, Aug 10, 12:22 PM EDT, 53 minutes before

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Special weather statement, Aug 10, 12:56 PM EDT, 19 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 9, 8:13 PM EDT	Special Marine Warning	AKQ		92 min
Aug 10, 11:30 AM EDT	Special Weather Statement	AKQ	Fluvanna, Louisa	60 min
Aug 10, 12:22 PM EDT	Special Weather Statement	AKQ	Fluvanna, Goochland, Louisa	38 min
Aug 10, 12:56 PM EDT	Special Weather Statement	AKQ	Goochland, Powhatan	44 min
Aug 10, 1:59 PM EDT	Severe Thunderstorm Warning	AKQ	Charles City, Hanover, Henrico, King William, New Kent, City of Richmond	46 min
Aug 10, 2:32 PM EDT	Severe Thunderstorm Warning	AKQ	Charles City, Gloucester, James City, King and Queen, King William, New Kent and 1 more	43 min
Aug 10, 2:41 PM EDT	Special Marine Warning	AKQ		94 min
Aug 10, 2:47 PM EDT	Special Marine Warning	AKQ		58 min
Aug 10, 2:53 PM EDT	Severe Thunderstorm Warning	AKQ	Isle of Wight, Surry, City of Newport News	37 min
Aug 10, 3:03 PM EDT	Severe Thunderstorm Warning	AKQ	Gloucester, James City, Mathews, York, City of Newport News, City of Williamsburg	42 min
Aug 10, 3:15 PM EDT	Special Marine Warning	AKQ		90 min
Aug 10, 3:23 PM EDT	Severe Thunderstorm Warning	AKQ	Isle of Wight, York, City of Hampton, City of Newport News, City of Norfolk, City of Poquoson and 1 more	37 min
Aug 10, 3:44 PM EDT	Severe Thunderstorm Warning	AKQ	City of Chesapeake, City of Norfolk, City of Portsmouth, City of Virginia Beach	46 min
Aug 10, 3:47 PM EDT	Special Marine Warning	AKQ		103 min
Aug 10, 4:05 PM EDT	Special Marine Warning	AKQ		85 min
Aug 10, 4:21 PM EDT	Special Weather Statement	AKQ	Mecklenburg	54 min
Aug 10, 4:43 PM EDT	Severe Thunderstorm Warning	AKQ	City of Virginia Beach	17 min
Aug 10, 5:12 PM EDT	Special Weather Statement	AKQ	Mecklenburg	63 min
Aug 10, 6:24 PM EDT	Special Weather Statement	AKQ	Greensville, City of Emporia	51 min
Aug 9, 8:32 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	58 min
Aug 9, 9:20 PM EDT	Areal Flood Advisory	AKQ	Wicomico, Worcester	2 hr
Aug 10, 3:29 PM EDT	Special Weather Statement	AKQ	Camden, Chowan, Currituck, Hertford, Pasquotank, Perquimans	61 min
Aug 10, 6:12 PM EDT	Special Weather Statement	AKQ	Pasquotank, Perquimans	63 min
Aug 10, 6:41 PM EDT	Special Weather Statement	AKQ	Camden, Currituck, Pasquotank, Perquimans	64 min
Aug 10, 7:46 PM EDT	Special Weather Statement	AKQ	Bertie, Chowan, Gates, Hertford	59 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2013 Every severe thunderstorm warning in 2013

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.