Alert archive / West Virginia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 210, NWS Baltimore/Washington

December 22, 2013Allegany County, Maryland; 5 counties in West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Dec 22, 2013, 4:04 AM EST for Allegany County, Maryland; 5 counties in West Virginia. It was in force for 41 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: Dec 22, 2013, 4:04 AM EST (09:04 UTC)
Expired: Dec 22, 2013, 4:45 AM EST
In force: 41 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties Allegany County, MD, Grant County, WV, Hampshire County, WV, Hardy County, WV, Mineral County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 128 km from the middle of the area, began a volume at 09:07 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
Dec 22, 3:37 AM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 9.1 hours before the alert went out and 136 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: 956 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 334 m²/s²
0-3 km storm-relative helicity: 410 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 Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 21, 5:38 PM EST, 10 hours 26 minutes earlier.

Area forecast discussion, Dec 21, 5:38 PM EST, 10 hours 26 minutes before

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Hazardous weather outlook, Dec 21, 5:37 PM EST, 10 hours 27 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 22, 9:32 AM EST	Special Marine Warning	LWX		43 min
Dec 22, 9:51 AM EST	Special Marine Warning	LWX		84 min
Dec 22, 9:58 AM EST	Special Marine Warning	LWX		62 min
Dec 22, 3:14 PM EST	Flood Watch	LWX	Arlington, Culpeper, Fairfax, Fauquier, Greene, King George and 11 more	17 hr

Nearby

Severe Thunderstorm Warnings in West Virginia, 2013 Severe Thunderstorm Warnings in Maryland, 2013 Every severe thunderstorm warning in 2013

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.