Alert archive / Virginia / Mesoscale Discussions in 2004

Mesoscale Discussion 1590

July 10, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2004, 1:21 PM EDT for 4 states. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2004, 1:21 PM EDT (17:21 UTC)
Expired: Jul 10, 2004, 3:15 PM EDT
In force: 114 min
Issued by: the Storm Prediction Center

All 75 counties

Boyd County, KY, Carter County, KY, Elliott County, KY, Floyd County, KY, Johnson County, KY, Lawrence County, KY, Magoffin County, KY, Martin County, KY, Pike County, KY, Gallia County, OH, Lawrence County, OH, Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, City of Buena Vista, VA, City of Covington, 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, Craig County, VA, Dickenson County, VA, Floyd County, VA, Franklin County, VA, Giles County, VA, Halifax County, VA, Henry County, VA, Highland County, VA, Lunenburg County, VA, Montgomery County, VA, Nelson County, VA, Patrick County, VA, Pittsylvania County, VA, Prince Edward County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Tazewell County, VA, Wythe County, VA, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Greenbrier County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monroe County, WV, Nicholas County, WV, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Roane County, WV, Summers County, WV, Wayne County, WV, Webster County, WV, Wyoming County, WV

The radar

The Roanoke radar (KFCX), 71 km from the middle of the area, began a volume at 17:21 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, 5.4 hours before the alert went out and 104 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: 194 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1082 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: -19 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, 2:53 PM EDT	Mesoscale Discussion	SPC	Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 10 more	3 hr

Nearby

Mesoscale Discussions in Virginia, 2004 Mesoscale Discussions in West Virginia, 2004 Mesoscale Discussions in Kentucky, 2004 Every mesoscale discussion in 2004

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.