Alert archive / Virginia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 82, NWS Wakefield, VA

May 11, 2017Mecklenburg County, Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at May 11, 2017, 6:40 PM EDT for Mecklenburg County, Virginia. It was in force for 50 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: May 11, 2017, 6:40 PM EDT (22:40 UTC)
Expired: May 11, 2017, 7:30 PM EDT
In force: 50 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Mecklenburg County, VA

The radar

The Raleigh/Durham radar (KRAX), 113 km from the middle of the area, began a volume at 22:44 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, 10.7 hours before the alert went out and 116 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: 1015 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 11, 5:49 PM EDT, 51 minutes earlier.

Area forecast discussion, May 11, 5:49 PM EDT, 51 minutes before

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Hazardous weather outlook, May 11, 4:24 PM EDT, 2 hours 16 minutes before

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In the hours before

Local storm report, May 11, 1:17 PM EDT, 5 hours 23 minutes before

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Special weather statement, May 11, 6:34 PM EDT, 6 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
May 10, 8:23 PM EDT	Special Weather Statement	AKQ	Prince Edward	37 min
May 10, 8:52 PM EDT	Special Weather Statement	AKQ	Amelia, Nottoway	38 min
May 10, 8:54 PM EDT	Special Weather Statement	AKQ	Lunenburg	36 min
May 10, 9:10 PM EDT	Severe Thunderstorm Warning	AKQ	Lunenburg, Mecklenburg	50 min
May 10, 9:22 PM EDT	Special Weather Statement	AKQ	Prince Edward	38 min
May 10, 9:28 PM EDT	Special Weather Statement	AKQ	Dinwiddie	47 min
May 10, 9:52 PM EDT	Severe Thunderstorm Warning	AKQ	Mecklenburg	38 min
May 10, 9:58 PM EDT	Special Weather Statement	AKQ	Lunenburg, Prince Edward	62 min
May 10, 10:42 PM EDT	Severe Thunderstorm Warning	AKQ	Lunenburg, Mecklenburg	63 min
May 10, 11:40 PM EDT	Severe Thunderstorm Warning	AKQ	Mecklenburg	35 min
May 10, 11:42 PM EDT	Special Weather Statement	AKQ	City of Franklin	63 min
May 11, 12:03 AM EDT	Special Weather Statement	AKQ	Brunswick	42 min
May 11, 2:00 AM EDT	Special Weather Statement	AKQ	Surry, City of Hampton, City of Newport News, City of Norfolk, City of Poquoson, City of Portsmouth and 1 more	45 min
May 11, 2:57 AM EDT	Small Craft Advisory	AKQ		5 days
May 11, 7:16 AM EDT	Special Weather Statement	AKQ	Essex, King and Queen, King William	29 min
May 11, 7:45 AM EDT	Special Weather Statement	AKQ	King and Queen, Middlesex	30 min
May 11, 8:18 AM EDT	Special Weather Statement	AKQ	Mathews, Middlesex	42 min
May 11, 9:39 AM EDT	Special Weather Statement	AKQ	Northampton	36 min
May 11, 10:16 AM EDT	Special Marine Warning	AKQ		44 min
May 11, 6:04 PM EDT	Coastal Flood Statement	AKQ	Accomack, Gloucester, James City, Lancaster, Mathews, Middlesex and 10 more	24 hr
May 11, 6:34 PM EDT	Special Weather Statement	AKQ	Mecklenburg	41 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2017 Every severe thunderstorm warning in 2017

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.