Alert archive / Virginia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 6, NWS Wakefield, VA

February 11, 20189 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Feb 11, 2018, 3:26 PM EST for 9 counties in Virginia. It was in force for 49 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: Feb 11, 2018, 3:26 PM EST (20:26 UTC)
Expired: Feb 11, 2018, 4:15 PM EST
In force: 49 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Essex County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Middlesex County, VA, New Kent County, VA, Northumberland County, VA, Richmond County, VA, Westmoreland County, VA

The radar

The Norfolk radar (KAKQ), 92 km from the middle of the area, began a volume at 20:30 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 12:00Z, 8.4 hours before the alert went out and 121 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: 808 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 265 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Feb 11, 2:06 PM EST, 1 hour 20 minutes earlier.

Area forecast discussion, Feb 11, 2:06 PM EST, 1 hour 20 minutes before

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Hazardous weather outlook, Feb 11, 3:39 AM EST, 11 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service Wakefield VA
339 AM EST Sun Feb 11 2018

MDZ021>025-NCZ012>017-030>032-102-VAZ065>068-075>090-092-093-095>100-
512>525-120845-
Dorchester-Wicomico-Somerset-Inland Worcester-Maryland Beaches-
Northampton-Hertford-Gates-Pasquotank-Camden-Western Currituck-
Bertie-Chowan-Perquimans-Eastern Currituck-Mecklenburg-Lunenburg-
Nottoway-Amelia-Westmoreland-Richmond-Northumberland-Lancaster-
Brunswick-Dinwiddie-Prince George-Charles City-New Kent-Gloucester-
Middlesex-Mathews-Greensville-Sussex-Surry-James City-Southampton-
Isle of Wight-Norfolk/Portsmouth-Suffolk-Chesapeake-Virginia Beach-
Accomack-Eastern Hanover-Western Chesterfield-
Eastern Chesterfield (Including Col. Heights)-
Western Henrico (Including the City of Richmond)-Eastern Henrico-
Western King William-Eastern King William-Western King and Queen-
Eastern King and Queen-Western Essex-Eastern Essex-York-Newport News-
Hampton/Poquoson-
339 AM EST Sun Feb 11 2018

This Hazardous Weather Outlook is for southeast Maryland, northeast
North Carolina, central Virginia, east central Virginia, eastern
Virginia, south central Virginia and southeast Virginia.

.DAY ONE...Today and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

VAZ048-060>062-064-069-509>511-120845-
Fluvanna-Prince Edward-Cumberland-Goochland-Caroline-Powhatan-
Western Louisa-Eastern Louisa-Western Hanover-
339 AM EST Sun Feb 11 2018

This Hazardous Weather Outlook is for central Virginia and north
central Virginia.

.DAY ONE...Today and Tonight.

Moderate to locally heavy rainfall this morning may result in
ponding of water on roadways as well as minor flooding of poor
drainage areas.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Feb 11, 12:12 PM EST, 3 hours 14 minutes before

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Special weather statement, Feb 11, 12:52 PM EST, 2 hours 34 minutes before

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Special weather statement, Feb 11, 1:43 PM EST, 1 hour 43 minutes before

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Special weather statement, Feb 11, 2:18 PM EST, 1 hour 8 minutes before

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Special weather statement, Feb 11, 2:29 PM EST, 57 minutes before

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Special weather statement, Feb 11, 3:05 PM EST, 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
Feb 10, 9:05 PM EST	Special Weather Statement	AKQ	Caroline, Cumberland, Fluvanna, Goochland, Louisa	55 min
Feb 10, 9:58 PM EST	Special Weather Statement	AKQ	Caroline, Cumberland, Fluvanna, Goochland, Louisa, Powhatan	62 min
Feb 11, 9:37 AM EST	Special Weather Statement	AKQ	Caroline, Hanover, Westmoreland	38 min
Feb 11, 11:21 AM EST	River Flood Warning	AKQ	Buckingham, Fluvanna	55 hr
Feb 11, 11:21 AM EST	River Flood Warning	AKQ	Cumberland, Goochland, Powhatan	35 hr
Feb 11, 11:21 AM EST	River Flood Warning	AKQ	Fluvanna	25 hr
Feb 11, 12:12 PM EST	Special Weather Statement	AKQ	Chesterfield, Henrico, City of Richmond	48 min
Feb 11, 12:52 PM EST	Special Weather Statement	AKQ	Essex, King and Queen, King William, Richmond, Westmoreland, City of Richmond	38 min
Feb 11, 2:29 PM EST	Special Weather Statement	AKQ	Chesterfield, Henrico, City of Richmond	46 min
Feb 11, 2:57 PM EST	River Flood Warning	AKQ	Henrico, City of Richmond	55 hr
Feb 11, 2:57 PM EST	River Flood Warning	AKQ	Chesterfield, Henrico, City of Richmond	67 hr
Feb 11, 3:05 PM EST	Special Weather Statement	AKQ	King and Queen, King William, New Kent	40 min
Feb 11, 3:55 PM EST	Special Weather Statement	AKQ	Charles City, Dinwiddie, Prince George, City of Colonial Heights, City of Hopewell, City of Petersburg	50 min
Feb 11, 4:13 PM EST	Special Weather Statement	AKQ	Northumberland	47 min
Feb 11, 4:38 PM EST	Special Weather Statement	AKQ	Charles City	37 min
Feb 11, 1:43 PM EST	Special Weather Statement	AKQ	Dorchester	47 min
Feb 11, 2:18 PM EST	Special Weather Statement	AKQ	Dorchester	42 min
Feb 11, 4:36 PM EST	Special Weather Statement	AKQ	Somerset, Wicomico	39 min
Feb 11, 5:12 PM EST	Special Weather Statement	AKQ	Worcester	48 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2018 Every severe thunderstorm warning in 2018

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.