Alert archive / Virginia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 89, NWS Wakefield, VA

June 30, 20154 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Jun 30, 2015, 9:52 PM EDT for 4 counties in Virginia. It was in force for 38 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: Jun 30, 2015, 9:52 PM EDT (01:52 UTC)
Expired: Jun 30, 2015, 10:30 PM EDT
In force: 38 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon

Counties City of Hampton, VA, City of Newport News, VA, City of Poquoson, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 54 km from the middle of the area, began a volume at 01:52 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, 1.9 hours before the alert went out and 128 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: 566 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1367 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 6.7

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 Jun 30, 9:39 PM EDT, 13 minutes earlier.

Area forecast discussion, Jun 30, 9:39 PM EDT, 13 minutes before

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Hazardous weather outlook, Jun 30, 9:27 PM EDT, 25 minutes before

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In the hours before

Special weather statement, Jun 30, 8:54 PM EDT, 58 minutes before

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Special weather statement, Jun 30, 9:02 PM EDT, 50 minutes before

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Local storm report, Jun 30, 9:04 PM EDT, 48 minutes before

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Local storm report, Jun 30, 9:05 PM EDT, 47 minutes before

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Special weather statement, Jun 30, 9:20 PM EDT, 32 minutes before

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Special weather statement, Jun 30, 9:31 PM EDT, 21 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
Jun 30, 8:00 PM EDT	Severe Thunderstorm Warning	AKQ	Greensville, Southampton, Sussex, City of Emporia	30 min
Jun 30, 8:20 PM EDT	Severe Thunderstorm Warning	AKQ	Lunenburg, Mecklenburg	40 min
Jun 30, 8:30 PM EDT	Severe Thunderstorm Warning	AKQ	Southampton, Sussex	30 min
Jun 30, 8:54 PM EDT	Special Weather Statement	AKQ	Brunswick, Dinwiddie, Greensville, City of Emporia	36 min
Jun 30, 9:02 PM EDT	Special Weather Statement	AKQ	Isle of Wight	28 min
Jun 30, 9:20 PM EDT	Special Weather Statement	AKQ	Prince Edward	40 min
Jun 30, 9:31 PM EDT	Special Weather Statement	AKQ	City of Newport News	44 min
Jun 30, 9:43 PM EDT	Severe Thunderstorm Warning	AKQ	Greensville, Isle of Wight, Southampton, City of Franklin, City of Suffolk	47 min
Jun 30, 9:48 PM EDT	Special Marine Warning	AKQ		57 min
Jun 30, 9:54 PM EDT	Severe Thunderstorm Warning	AKQ	Brunswick, Greensville, Sussex, City of Emporia	36 min
Jun 30, 10:30 PM EDT	Severe Thunderstorm Warning	AKQ	Isle of Wight, Southampton, City of Chesapeake, City of Franklin, City of Norfolk, City of Portsmouth and 1 more	45 min
Jun 30, 10:41 PM EDT	Special Weather Statement	AKQ	Caroline, Goochland, Hanover, King William	49 min
Jun 30, 10:52 PM EDT	Special Weather Statement	AKQ	Fluvanna, Goochland, Louisa	53 min
Jun 30, 11:22 PM EDT	Special Weather Statement	AKQ	Richmond, Westmoreland	23 min
Jun 30, 11:46 PM EDT	Special Weather Statement	AKQ	Louisa	29 min
Jun 30, 8:03 PM EDT	Special Weather Statement	AKQ	Camden, Pasquotank	27 min
Jun 30, 8:29 PM EDT	Special Weather Statement	AKQ	Northampton	46 min
Jun 30, 8:30 PM EDT	Special Weather Statement	AKQ	Camden, Pasquotank	45 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2015 Every severe thunderstorm warning in 2015

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.