Alert archive / Virginia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 120, NWS Wakefield, VA

May 30, 2017Richmond County, Westmoreland County, Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at May 30, 2017, 7:53 PM EDT for Richmond County, Westmoreland County, Virginia. It was in force for 52 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 30, 2017, 7:53 PM EDT (23:53 UTC)
Expired: May 30, 2017, 8:45 PM EDT
In force: 52 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Richmond County, VA, Westmoreland County, VA

The radar

The Norfolk radar (KAKQ), 118 km from the middle of the area, began a volume at 23:54 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.9 hours before the alert went out and 117 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: 70 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 528 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 30, 4:43 PM EDT, 3 hours 10 minutes earlier.

Area forecast discussion, May 30, 4:43 PM EDT, 3 hours 10 minutes before

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Hazardous weather outlook, May 30, 4:34 PM EDT, 3 hours 19 minutes before

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In the hours before

Special weather statement, May 30, 5:25 PM EDT, 2 hours 28 minutes before

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Special weather statement, May 30, 7:08 PM EDT, 45 minutes before

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Special weather statement, May 30, 7:47 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 29, 8:20 PM EDT	Special Weather Statement	AKQ	Middlesex	40 min
May 29, 9:43 PM EDT	Small Craft Advisory	AKQ		21 hr
May 30, 10:17 AM EDT	Coastal Flood Statement	AKQ	Accomack, Gloucester, James City, Lancaster, Mathews, Middlesex and 4 more	10 hr
May 30, 10:39 AM EDT	Special Weather Statement	AKQ	City of Chesapeake, City of Virginia Beach	36 min
May 30, 5:25 PM EDT	Special Weather Statement	AKQ	City of Norfolk	35 min
May 30, 7:08 PM EDT	Special Weather Statement	AKQ	Caroline	52 min
May 30, 7:47 PM EDT	Special Weather Statement	AKQ	Westmoreland	43 min
May 30, 4:11 PM EDT	Coastal Flood Advisory	AKQ	Dorchester, Somerset, Wicomico	15 hr

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.