Alert archive / Virginia / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 512

June 11, 20034 counties in Maryland; 48 counties in Virginia; 27 counties in West Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2003, 3:25 PM EDT for 4 counties in Maryland; 48 counties in Virginia; 27 counties in West Virginia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2003, 3:25 PM EDT (19:25 UTC)
Expired: Jun 11, 2003, 9:00 PM EDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 79 counties

Allegany County, MD, Frederick County, MD, Garrett County, MD, Washington County, MD, Alleghany County, VA, Amherst County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Carroll County, VA, City of Bristol, VA, City of Buena Vista, VA, City of Covington, VA, City of Galax, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Craig County, VA, Dickenson County, VA, Floyd County, VA, Franklin County, VA, Frederick County, VA, Giles County, VA, Grayson County, VA, Greene County, VA, Highland County, VA, Loudoun County, VA, Montgomery County, VA, Page County, VA, Patrick County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Russell County, VA, Scott County, VA, Shenandoah County, VA, Smyth County, VA, Tazewell County, VA, Warren County, VA, Washington County, VA, Wythe County, VA, Barbour County, WV, Berkeley County, WV, Braxton County, WV, Fayette County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Lewis County, WV, McDowell County, WV, Mercer County, WV, Mineral County, WV, Monroe County, WV, Morgan County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Preston County, WV, Raleigh County, WV, Randolph County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV, Webster County, WV, Wyoming County, WV

The radar

The Roanoke radar (KFCX), 93 km from the middle of the area, began a volume at 19:25 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.

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 11, 4:17 PM EDT	Severe Thunderstorm Warning	RNK	Pulaski	43 min
Jun 11, 4:31 PM EDT	Severe Thunderstorm Warning	RNK	Giles	29 min
Jun 11, 4:36 PM EDT	Severe Thunderstorm Warning	MRX	Washington	39 min
Jun 11, 5:09 PM EDT	Flash Flood Warning	LWX	Augusta, Nelson, City of Staunton, City of Waynesboro	4 hr
Jun 11, 5:13 PM EDT	Flash Flood Warning	RNK	Smyth	3 hr
Jun 11, 5:29 PM EDT	Severe Thunderstorm Warning	MRX	Scott	46 min
Jun 11, 5:35 PM EDT	Severe Thunderstorm Warning	MRX	Washington	55 min
Jun 11, 5:51 PM EDT	Flash Flood Warning	MRX	Washington, City of Bristol	4 hr
Jun 11, 6:07 PM EDT	Severe Thunderstorm Warning	MRX	Russell	53 min
Jun 11, 6:14 PM EDT	Severe Thunderstorm Warning	MRX	Scott	46 min
Jun 11, 6:30 PM EDT	Severe Thunderstorm Warning	MRX	Washington	45 min
Jun 11, 7:33 PM EDT	Severe Thunderstorm Warning	LWX	Clarke	42 min
Jun 11, 7:49 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	56 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.4 hours before the alert went out and 118 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: 73 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 1056 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 3:05 PM EDT	Mesoscale Discussion	SPC	Montgomery	25 min
Jun 11, 7:07 PM EDT	Mesoscale Discussion	SPC	Allegany, Frederick, Garrett, Washington	53 min
Jun 11, 11:30 AM EDT	Severe Thunderstorm Watch	SPC	Lee	6 hr
Jun 11, 2:13 PM EDT	Mesoscale Discussion	SPC	Lee	92 min
Jun 11, 4:25 PM EDT	Severe Thunderstorm Watch	SPC	Lee, Wise	5 hr

Nearby

Severe Thunderstorm Watches in Virginia, 2003 Severe Thunderstorm Watches in West Virginia, 2003 Severe Thunderstorm Watches in Maryland, 2003 Every severe thunderstorm watch in 2003

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.