Alert archive / Virginia / Mesoscale Discussions in 2008

Mesoscale Discussion 176

February 6, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Feb 6, 2008, 4:49 AM EST for 4 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Feb 6, 2008, 4:49 AM EST (09:49 UTC)
Expired: Feb 6, 2008, 6:15 AM EST
In force: 86 min
Issued by: the Storm Prediction Center

All 80 counties

Letcher County, KY, Garrett County, MD, Albemarle County, VA, 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, Buckingham County, VA, Campbell County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Norton, 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, Culpeper County, VA, Dickenson County, VA, Fauquier County, VA, Floyd County, VA, Fluvanna County, VA, Franklin County, VA, Frederick County, VA, Giles County, VA, Greene County, VA, Highland County, VA, Louisa County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Orange County, VA, Page County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Russell County, VA, Shenandoah County, VA, Tazewell County, VA, Warren County, VA, Wise County, VA, Wythe County, VA, Barbour County, WV, Braxton County, WV, Fayette County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Lewis County, WV, McDowell County, WV, Mercer County, WV, Mineral County, WV, Monroe 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 Charleston,WV radar (KRLX), 125 km from the middle of the area, began a volume at 09:49 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 00:00Z, 9.8 hours before the alert went out and 130 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: 2 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1396 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 151 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
Feb 5, 7:15 PM EST	Mesoscale Discussion	SPC	Allen, Anderson, Barren, Boone, Boyle, Bracken and 49 more	90 min
Feb 5, 8:08 PM EST	Tornado Watch	SPC	Adair, Allen, Anderson, Barren, Boone, Bourbon and 53 more	6 hr
Feb 5, 9:07 PM EST	Mesoscale Discussion	SPC	Ballard, Calloway, Carlisle, Crittenden, Fulton, Graves and 5 more	83 min
Feb 5, 10:19 PM EST	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Bath, Bell and 99 more	86 min
Feb 6, 12:41 AM EST	Tornado Watch	SPC	Adair, Allen, Barren, Bath, Bourbon, Boyd and 44 more	5 hr
Feb 6, 2:31 AM EST	Severe Thunderstorm Watch	SPC	Bell, Floyd, Harlan, Knott, Leslie, Letcher and 3 more	3 hr
Feb 6, 2:48 AM EST	Mesoscale Discussion	SPC	Bath, Bell, Boyd, Breathitt, Carter, Clay and 37 more	87 min
Feb 6, 8:49 AM EST	Mesoscale Discussion	SPC	Pike	116 min
Feb 6, 11:54 AM EST	Mesoscale Discussion	SPC	Adair, Anderson, Barren, Bath, Boone, Bourbon and 77 more	96 min
Feb 6, 6:09 PM EST	Mesoscale Discussion	SPC	Allegany, Garrett	66 min

Nearby

Mesoscale Discussions in Virginia, 2008 Mesoscale Discussions in West Virginia, 2008 Mesoscale Discussions in Kentucky, 2008 Every mesoscale discussion in 2008

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.