Alert archive / Virginia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 117, NWS Wakefield, VA

August 30, 20184 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Aug 30, 2018, 7:43 PM EDT for 4 counties in Virginia. It was in force for 47 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 30, 2018, 7:43 PM EDT (23:43 UTC)
Expired: Aug 30, 2018, 8:30 PM EDT
In force: 47 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Amelia County, VA, Chesterfield County, VA, City of Richmond, VA, Powhatan County, VA

The radar

The Norfolk radar (KAKQ), 83 km from the middle of the area, began a volume at 23:44 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, 11.7 hours before the alert went out and 159 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: 609 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 928 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: -10 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 Aug 30, 3:50 PM EDT, 3 hours 53 minutes earlier.

Area forecast discussion, Aug 30, 3:50 PM EDT, 3 hours 53 minutes before

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Hazardous weather outlook, Aug 30, 4:09 PM EDT, 3 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Wakefield VA
409 PM EDT Thu Aug 30 2018

MDZ021>025-NCZ012>017-030>032-102-VAZ065-075>090-092-093-095>100-
517>525-312015-
Dorchester-Wicomico-Somerset-Inland Worcester-Maryland Beaches-
Northampton-Hertford-Gates-Pasquotank-Camden-Western Currituck-
Bertie-Chowan-Perquimans-Eastern Currituck-Mecklenburg-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-Western King William-
Eastern King William-Western King and Queen-Eastern King and Queen-
Western Essex-Eastern Essex-York-Newport News-Hampton/Poquoson-
409 PM EDT Thu Aug 30 2018

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

.DAY ONE...Tonight.

Scattered showers and thunderstorms tonight could produce locally
heavy downpours and strong gusty winds.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

VAZ048-060>062-064-066>069-509>516-312015-
Fluvanna-Prince Edward-Cumberland-Goochland-Caroline-Lunenburg-
Nottoway-Amelia-Powhatan-Western Louisa-Eastern Louisa-
Western Hanover-Eastern Hanover-Western Chesterfield-
Eastern Chesterfield (Including Col. Heights)-
Western Henrico (Including the City of Richmond)-Eastern Henrico-
409 PM EDT Thu Aug 30 2018

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

.DAY ONE...Tonight.

Scattered showers and thunderstorms this evening will produce locally
heavy downpours. There is also an isolated threat for severe
thunderstorms with damaging winds being the primary threat.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

TG

In the hours before

Special weather statement, Aug 30, 6:30 PM EDT, 1 hour 13 minutes before

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Special weather statement, Aug 30, 7:12 PM EDT, 31 minutes before

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Special weather statement, Aug 30, 7:19 PM EDT, 24 minutes before

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Special weather statement, Aug 30, 7:25 PM EDT, 18 minutes before

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Special weather statement, Aug 30, 7:31 PM EDT, 12 minutes before

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Special weather statement, Aug 30, 7:38 PM EDT, 5 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 30, 2:55 PM EDT	Special Weather Statement	AKQ	Dinwiddie	35 min
Aug 30, 3:02 PM EDT	Special Weather Statement	AKQ	Henrico	28 min
Aug 30, 3:10 PM EDT	Special Weather Statement	AKQ	City of Virginia Beach	35 min
Aug 30, 3:16 PM EDT	Special Weather Statement	AKQ	Louisa	29 min
Aug 30, 3:21 PM EDT	Special Weather Statement	AKQ	Henrico	24 min
Aug 30, 3:34 PM EDT	Special Weather Statement	AKQ	James City	26 min
Aug 30, 3:44 PM EDT	Special Weather Statement	AKQ	City of Virginia Beach	31 min
Aug 30, 3:49 PM EDT	Special Weather Statement	AKQ	Louisa	26 min
Aug 30, 3:53 PM EDT	Special Weather Statement	AKQ	Prince George	37 min
Aug 30, 4:00 PM EDT	Areal Flood Advisory	AKQ	City of Virginia Beach	2 hr
Aug 30, 4:09 PM EDT	Special Weather Statement	AKQ	City of Norfolk	51 min
Aug 30, 4:16 PM EDT	Special Weather Statement	AKQ	Gloucester	44 min
Aug 30, 4:23 PM EDT	Special Weather Statement	AKQ	City of Chesapeake	37 min
Aug 30, 4:30 PM EDT	Special Weather Statement	AKQ	Fluvanna	30 min
Aug 30, 4:49 PM EDT	Areal Flood Advisory	AKQ	City of Chesapeake, City of Norfolk, City of Portsmouth	116 min
Aug 30, 4:58 PM EDT	Special Weather Statement	AKQ	Cumberland, Fluvanna	47 min
Aug 30, 5:17 PM EDT	Special Weather Statement	AKQ	Middlesex	28 min
Aug 30, 5:18 PM EDT	Special Weather Statement	AKQ	James City	42 min
Aug 30, 5:42 PM EDT	Areal Flood Advisory	AKQ	Cumberland, Powhatan	3 hr
Aug 30, 5:52 PM EDT	Special Weather Statement	AKQ	Middlesex	23 min
Aug 30, 5:56 PM EDT	Special Weather Statement	AKQ	Amelia	49 min
Aug 30, 6:01 PM EDT	Special Weather Statement	AKQ	City of Richmond	29 min
Aug 30, 6:05 PM EDT	Special Weather Statement	AKQ	Cumberland	25 min
Aug 30, 6:19 PM EDT	Special Weather Statement	AKQ	Goochland	26 min
Aug 30, 6:25 PM EDT	Special Weather Statement	AKQ	Dinwiddie	35 min
Aug 30, 6:30 PM EDT	Special Weather Statement	AKQ	Prince Edward	45 min
Aug 30, 6:45 PM EDT	Areal Flood Advisory	AKQ	Goochland, Louisa, Powhatan	3 hr
Aug 30, 6:48 PM EDT	Areal Flood Advisory	AKQ	Nottoway	5 hr
Aug 30, 7:12 PM EDT	Special Weather Statement	AKQ	Prince George, Sussex	33 min
Aug 30, 7:19 PM EDT	Special Weather Statement	AKQ	Prince Edward	26 min
Aug 30, 7:25 PM EDT	Special Weather Statement	AKQ	Prince Edward	20 min
Aug 30, 7:31 PM EDT	Special Weather Statement	AKQ	Chesterfield	29 min
Aug 30, 7:38 PM EDT	Special Weather Statement	AKQ	Fluvanna	37 min
Aug 30, 7:53 PM EDT	Special Weather Statement	AKQ	Prince Edward	37 min
Aug 30, 7:56 PM EDT	Areal Flood Advisory	AKQ	Prince Edward	2 hr
Aug 30, 7:56 PM EDT	Areal Flood Advisory	AKQ	Chesterfield, City of Richmond	2 hr

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.