Alert archive / Virginia / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 120, NWS Wakefield, VA

July 28, 20166 counties in Virginia

NWS Wakefield, VA issued this severe thunderstorm warning at Jul 28, 2016, 10:40 PM EDT for 6 counties in 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: Jul 28, 2016, 10:40 PM EDT (02:40 UTC)
Expired: Jul 28, 2016, 11:30 PM EDT
In force: 50 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Gloucester County, VA, James City County, VA, King and Queen County, VA, King William County, VA, Middlesex County, VA, New Kent County, VA

The radar

The Norfolk radar (KAKQ), 64 km from the middle of the area, began a volume at 02:41 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, 2.7 hours before the alert went out and 131 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: 962 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 178 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.8

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 Jul 28, 9:01 PM EDT, 1 hour 39 minutes earlier.

Area forecast discussion, Jul 28, 9:01 PM EDT, 1 hour 39 minutes before

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Hazardous weather outlook, Jul 28, 8:48 PM EDT, 1 hour 52 minutes before

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In the hours before

Local storm report, Jul 28, 9:21 PM EDT, 1 hour 19 minutes before

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Local storm report, Jul 28, 9:28 PM EDT, 1 hour 12 minutes before

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Local storm report, Jul 28, 9:37 PM EDT, 1 hour 3 minutes before

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Special weather statement, Jul 28, 10:07 PM EDT, 33 minutes before

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Special weather statement, Jul 28, 10:29 PM EDT, 11 minutes before

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Special weather statement, Jul 28, 10:31 PM EDT, 9 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
Jul 28, 8:04 PM EDT	Special Marine Warning	AKQ		56 min
Jul 28, 8:05 PM EDT	Tornado Warning	AKQ	Accomack	25 min
Jul 28, 8:17 PM EDT	Special Marine Warning	AKQ		58 min
Jul 28, 8:21 PM EDT	Special Weather Statement	AKQ	Accomack	39 min
Jul 28, 8:29 PM EDT	Severe Thunderstorm Warning	AKQ	Accomack	34 min
Jul 28, 8:39 PM EDT	Special Weather Statement	AKQ	Caroline, Essex, Louisa, Westmoreland	66 min
Jul 28, 9:43 PM EDT	Severe Thunderstorm Warning	AKQ	Caroline, Essex, King and Queen, King William, Richmond, Westmoreland	47 min
Jul 28, 9:50 PM EDT	Tornado Warning	AKQ	Essex, King and Queen, Richmond, Westmoreland	40 min
Jul 28, 10:07 PM EDT	Special Weather Statement	AKQ	Hanover, Henrico, King William, City of Richmond	38 min
Jul 28, 10:22 PM EDT	Tornado Warning	AKQ	Essex, Lancaster, Middlesex, Northumberland, Richmond, Westmoreland	53 min
Jul 28, 10:23 PM EDT	Special Marine Warning	AKQ		67 min
Jul 28, 10:29 PM EDT	Special Weather Statement	AKQ	Henrico, New Kent	46 min
Jul 28, 10:31 PM EDT	Special Weather Statement	AKQ	Hanover, Powhatan, City of Richmond	44 min
Jul 28, 10:59 PM EDT	Special Weather Statement	AKQ	Essex, King and Queen, King William	46 min
Jul 28, 11:18 PM EDT	Special Marine Warning	AKQ		72 min
Jul 28, 11:23 PM EDT	Special Weather Statement	AKQ	Lancaster, Northumberland	37 min
Jul 28, 11:27 PM EDT	Severe Thunderstorm Warning	AKQ	Gloucester, King and Queen, Lancaster, Mathews, Middlesex	48 min
Jul 28, 11:56 PM EDT	Special Weather Statement	AKQ	Amelia, Nottoway, Prince Edward	49 min
Jul 29, 12:05 AM EDT	Special Weather Statement	AKQ	Accomack	40 min
Jul 29, 12:07 AM EDT	Special Weather Statement	AKQ	King and Queen, Lancaster, Northumberland	38 min
Jul 29, 12:14 AM EDT	Special Weather Statement	AKQ	Cumberland, Goochland, Powhatan	31 min
Jul 29, 12:18 AM EDT	Severe Thunderstorm Warning	AKQ	Accomack	42 min
Jul 29, 12:30 AM EDT	Special Marine Warning	AKQ		60 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2016 Every severe thunderstorm warning in 2016

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.