Alert archive / Virginia / Mesoscale Discussions in 2014

Mesoscale Discussion 963

June 11, 201410 counties in North Carolina; 38 counties in Virginia; Monroe County, Pendleton County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2014, 6:56 PM EDT for 10 counties in North Carolina; 38 counties in Virginia; Monroe County, Pendleton County, West Virginia. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2014, 6:56 PM EDT (22:56 UTC)
Expired: Jun 11, 2014, 8:30 PM EDT
In force: 94 min
Issued by: the Storm Prediction Center

All 50 counties

Alleghany County, NC, Caswell County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Rockingham County, NC, Rowan County, NC, Stokes County, NC, Surry County, NC, Yadkin County, NC, Alleghany County, VA, Amherst County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Campbell County, VA, Carroll County, VA, City of Buena Vista, VA, City of Covington, VA, City of Danville, VA, City of Galax, 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, Floyd County, VA, Franklin County, VA, Giles County, VA, Halifax County, VA, Henry County, VA, Highland County, VA, Montgomery County, VA, Nelson County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Wythe County, VA, Monroe County, WV, Pendleton County, WV

The radar

The Roanoke radar (KFCX), 36 km from the middle of the area, began a volume at 22:58 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, 10.9 hours before the alert went out and 36 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: 34 J/kg
Mixed-layer CIN: -291 J/kg
Mixed-layer LCL: 1084 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 55 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, 2:25 PM EDT	Mesoscale Discussion	SPC	Alamance, Alexander, Anson, Beaufort, Bertie, Bladen and 57 more	95 min
Jun 11, 3:24 PM EDT	Severe Thunderstorm Watch	SPC	Bertie, Camden, Caswell, Chowan, Currituck, Gates and 11 more	7 hr
Jun 11, 12:25 PM EDT	Mesoscale Discussion	SPC	Alleghany, Bath, Bland, Buchanan, Craig, Dickenson and 12 more	2 hr
Jun 11, 1:32 PM EDT	Mesoscale Discussion	SPC	Arlington, Clarke, Fairfax, Fauquier, Frederick, Loudoun and 8 more	118 min
Jun 11, 2:06 PM EDT	Severe Thunderstorm Watch	SPC	Smyth, Tazewell	7 hr
Jun 11, 2:59 PM EDT	Tornado Watch	SPC	Arlington, Clarke, Fairfax, Fauquier, Frederick, Loudoun and 9 more	6 hr
Jun 10, 8:30 PM EDT	Mesoscale Discussion	SPC	Boone, Braxton, Cabell, Calhoun, Clay, Doddridge and 21 more	90 min

Nearby

Mesoscale Discussions in Virginia, 2014 Mesoscale Discussions in North Carolina, 2014 Mesoscale Discussions in West Virginia, 2014 Every mesoscale discussion in 2014

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.