Alert archive / Virginia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 11, NWS Baltimore/Washington

March 28, 2012Highland County, Virginia; Pendleton County, West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Mar 28, 2012, 6:02 PM EDT for Highland County, Virginia; Pendleton County, West Virginia. It was in force for 22 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: Mar 28, 2012, 6:02 PM EDT (22:02 UTC)
Expired: Mar 28, 2012, 6:24 PM EDT
In force: 22 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties Highland County, VA, Pendleton County, WV

The radar

The Sterling radar (KLWX), 178 km from the middle of the area, began a volume at 22:04 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
Mar 28, 2:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 10.0 hours before the alert went out and 147 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: 1288 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 296 m²/s²
0-3 km storm-relative helicity: 269 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 Mar 28, 5:14 PM EDT, 48 minutes earlier.

Area forecast discussion, Mar 28, 5:14 PM EDT, 48 minutes before

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Hazardous weather outlook, Mar 28, 4:21 PM EDT, 1 hour 41 minutes before

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In the hours before

Special weather statement, Mar 28, 3:51 PM EDT, 2 hours 11 minutes before

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Special weather statement, Mar 28, 3:52 PM EDT, 2 hours 10 minutes before

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Local storm report, Mar 28, 3:54 PM EDT, 2 hours 8 minutes before

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Special weather statement, Mar 28, 4:16 PM EDT, 1 hour 46 minutes before

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Local storm report, Mar 28, 4:24 PM EDT, 1 hour 38 minutes before

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Special weather statement, Mar 28, 5:49 PM EDT, 13 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
Mar 28, 3:26 AM EDT	Small Craft Advisory	LWX		39 hr
Mar 28, 4:47 AM EDT	Coastal Flood Advisory	LWX	Arlington, Fairfax, King George, Stafford, City of Alexandria, City of Fairfax and 1 more	9 hr
Mar 28, 2:43 PM EDT	Severe Thunderstorm Warning	LWX	Rockingham, Shenandoah	32 min
Mar 28, 3:07 PM EDT	Severe Thunderstorm Warning	LWX	Page, Rappahannock, Shenandoah, Warren	21 min
Mar 28, 3:23 PM EDT	Severe Thunderstorm Warning	LWX	Highland	31 min
Mar 28, 3:51 PM EDT	Special Weather Statement	LWX	Fauquier, Prince William, City of Manassas, City of Manassas Park	24 min
Mar 28, 3:52 PM EDT	Special Weather Statement	LWX	Culpeper	23 min
Mar 28, 5:49 PM EDT	Special Weather Statement	LWX	Highland	26 min
Mar 28, 1:43 PM EDT	Special Weather Statement	LWX	Morgan	17 min
Mar 28, 1:49 PM EDT	Special Weather Statement	LWX	Grant	26 min
Mar 28, 2:08 PM EDT	Special Weather Statement	LWX	Grant	22 min
Mar 28, 2:25 PM EDT	Special Weather Statement	LWX	Grant	20 min
Mar 28, 4:16 PM EDT	Special Weather Statement	LWX	Pendleton	29 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2012 Severe Thunderstorm Warnings in West Virginia, 2012 Every severe thunderstorm warning in 2012

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.