Alert archive / Virginia / Mesoscale Discussions in 2003

Mesoscale Discussion 1765

July 10, 200357 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2003, 6:25 PM EDT for 57 counties in Virginia. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2003, 6:25 PM EDT (22:25 UTC)
Expired: Jul 10, 2003, 7:30 PM EDT
In force: 65 min
Issued by: the Storm Prediction Center

All 57 counties

Albemarle County, VA, Alleghany County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, Charlotte County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, Craig County, VA, Culpeper County, VA, Cumberland County, VA, Fauquier County, VA, Floyd County, VA, Fluvanna County, VA, Franklin County, VA, Goochland County, VA, Greene County, VA, Halifax County, VA, Henry County, VA, Louisa County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Orange County, VA, Page County, VA, Patrick County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Prince William County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA

The radar

The Roanoke radar (KFCX), 161 km from the middle of the area, began a volume at 22:26 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 719Jul 10, 6:50 PM EDT

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 10.4 hours before the alert went out and 98 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: 173 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 86 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
Jul 10, 10:20 AM EDT	Mesoscale Discussion	SPC	Lee, Scott	85 min
Jul 10, 11:20 AM EDT	Severe Thunderstorm Watch	SPC	City of Bristol	7 hr
Jul 10, 3:45 PM EDT	Severe Thunderstorm Watch	SPC	Bland, Buchanan, Dickenson, Lee, Russell, Scott and 5 more	6 hr
Jul 10, 5:38 PM EDT	Mesoscale Discussion	SPC	Lee, Scott, City of Bristol	37 min
Jul 10, 6:50 PM EDT	Severe Thunderstorm Watch	SPC	Albemarle, Alleghany, Amherst, Appomattox, Augusta, Bath and 52 more	6 hr
Jul 10, 6:57 PM EDT	Mesoscale Discussion	SPC	Bland, Buchanan, Dickenson, Highland, Lee, Russell and 7 more	93 min

Nearby

Mesoscale Discussions in Virginia, 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.