Alert archive / Virginia / Mesoscale Discussions in 2003

Mesoscale Discussion 1333

June 11, 20034 counties in Maryland; 41 counties in Virginia; 11 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2003, 7:07 PM EDT for 4 counties in Maryland; 41 counties in Virginia; 11 counties in West Virginia. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2003, 7:07 PM EDT (23:07 UTC)
Expired: Jun 11, 2003, 8:00 PM EDT
In force: 53 min
Issued by: the Storm Prediction Center

All 56 counties

Allegany County, MD, Frederick County, MD, Garrett County, MD, Washington County, MD, Amherst County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Carroll County, VA, City of Buena Vista, 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, Highland 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, Shenandoah County, VA, Smyth County, VA, Tazewell County, VA, Warren County, VA, Washington County, VA, Wythe County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV, Preston County, WV, Taylor County, WV, Tucker County, WV

The radar

The Roanoke radar (KFCX), 80 km from the middle of the area, began a volume at 23:06 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

Roanoke, VA (KRNK), launched 12:00Z, 11.1 hours before the alert went out and 112 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

The text

As transmitted, in the capitals the NWS used until 2016.

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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, 3:25 PM EDT	Severe Thunderstorm Watch	SPC	Allegany, Frederick, Garrett, Washington	6 hr
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

Mesoscale Discussions in Virginia, 2003 Mesoscale Discussions in West Virginia, 2003 Mesoscale Discussions in Maryland, 2003 Every mesoscale discussion 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.