Alert archive / Virginia / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 101, NWS Baltimore/Washington

June 6, 2010King George County, Prince William County, Stafford County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 6, 2010, 3:50 PM EDT for King George County, Prince William County, Stafford County, Virginia. It was in force for 25 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: Jun 6, 2010, 3:50 PM EDT (19:50 UTC)
Expired: Jun 6, 2010, 4:15 PM EDT
In force: 25 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties King George County, VA, Prince William County, VA, Stafford County, VA

The radar

The Sterling radar (KLWX), 58 km from the middle of the area, began a volume at 19:52 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 6, 12:40 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.8 hours before the alert went out and 54 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: 627 J/kg
Mixed-layer CIN: -200 J/kg
Mixed-layer LCL: 1397 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 6, 3:08 PM EDT, 42 minutes earlier.

Area forecast discussion, Jun 6, 3:08 PM EDT, 42 minutes before

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Hazardous weather outlook, Jun 6, 3:49 PM EDT, 1 minute before

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In the hours before

Local storm report, Jun 6, 2:41 PM EDT, 1 hour 9 minutes before

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Local storm report, Jun 6, 2:43 PM EDT, 1 hour 7 minutes before

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Special weather statement, Jun 6, 2:46 PM EDT, 1 hour 4 minutes before

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Local storm report, Jun 6, 3:12 PM EDT, 38 minutes before

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Local storm report, Jun 6, 3:14 PM EDT, 36 minutes before

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Special weather statement, Jun 6, 3:27 PM EDT, 23 minutes before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 6, 12:15 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	30 min
Jun 6, 12:44 PM EDT	Special Weather Statement	LWX	Clarke, Frederick, City of Winchester	31 min
Jun 6, 12:53 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Frederick, City of Winchester	37 min
Jun 6, 1:18 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	27 min
Jun 6, 1:30 PM EDT	Special Marine Warning	LWX		2 hr
Jun 6, 1:43 PM EDT	Severe Thunderstorm Warning	LWX	Arlington, Fairfax, Loudoun, City of Falls Church	47 min
Jun 6, 2:12 PM EDT	Special Marine Warning	LWX		2 hr
Jun 6, 2:46 PM EDT	Special Weather Statement	LWX	Culpeper	44 min
Jun 6, 3:22 PM EDT	Special Marine Warning	LWX		113 min
Jun 6, 3:27 PM EDT	Special Weather Statement	LWX	Stafford	48 min
Jun 6, 3:30 PM EDT	Tornado Warning	LWX	Culpeper, Fauquier, Stafford	30 min
Jun 6, 3:58 PM EDT	Severe Thunderstorm Warning	LWX	King George	47 min
Jun 6, 4:17 PM EDT	Special Marine Warning	LWX		118 min
Jun 6, 6:14 PM EDT	Special Marine Warning	LWX		2 hr
Jun 6, 11:20 AM EDT	Special Weather Statement	LWX	Allegany	25 min
Jun 6, 2:28 PM EDT	Special Weather Statement	LWX	Anne Arundel, Prince George's, City of Baltimore	47 min
Jun 6, 2:42 PM EDT	Tornado Warning	LWX	Anne Arundel, Prince George's	23 min
Jun 6, 4:44 PM EDT	Special Weather Statement	LWX	Saint Mary's	46 min
Jun 6, 11:45 AM EDT	Special Weather Statement	LWX	Mineral	30 min
Jun 6, 12:22 PM EDT	Special Weather Statement	LWX	Berkeley	23 min
Jun 6, 12:59 PM EDT	Special Weather Statement	LWX	Grant, Hardy	31 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2010 Every severe thunderstorm warning in 2010

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.