Alert archive / Virginia / Mesoscale Discussions in 2019

Mesoscale Discussion 357

April 14, 201932 counties in North Carolina; 18 counties in South Carolina; 34 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 14, 2019, 10:09 PM EDT for 32 counties in North Carolina; 18 counties in South Carolina; 34 counties in Virginia. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Apr 14, 2019, 10:09 PM EDT (02:09 UTC)
Expired: Apr 14, 2019, 11:45 PM EDT
In force: 96 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 84 counties

Alamance County, NC, Alexander County, NC, Alleghany County, NC, Anson County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Caswell County, NC, Catawba County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Gaston County, NC, Guilford County, NC, Iredell County, NC, Lincoln County, NC, Mecklenburg County, NC, Montgomery County, NC, Orange County, NC, Person County, NC, Polk County, NC, Randolph County, NC, Rockingham County, NC, Rowan County, NC, Rutherford County, NC, Stanly County, NC, Stokes County, NC, Surry County, NC, Union County, NC, Wilkes County, NC, Yadkin County, NC, Abbeville County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC, Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, City of Buena Vista, VA, City of Covington, VA, City of Danville, VA, City of Galax, 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, Cumberland County, VA, Floyd County, VA, Franklin County, VA, Grayson County, VA, Halifax County, VA, Henry 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

The radar

The Roanoke radar (KFCX), 116 km from the middle of the area, began a volume at 02:10 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.

Tornado Watch 72Apr 14, 10:15 PM EDT

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.2 hours before the alert went out and 53 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: 558 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 278 m²/s²
0-3 km storm-relative helicity: 329 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 8.2

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 14, 10:14 PM EDT	Tornado Watch	SPC	Alamance, Alexander, Alleghany, Anson, Burke, Cabarrus and 37 more	6 hr
Apr 15, 12:07 AM EDT	Mesoscale Discussion	SPC	Franklin, Halifax, Nash, Northampton, Vance, Warren	113 min
Apr 15, 12:41 AM EDT	Tornado Watch	SPC	Bertie, Camden, Chowan, Currituck, Edgecombe, Franklin and 11 more	5 hr
Apr 15, 2:18 AM EDT	Mesoscale Discussion	SPC	Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 21 more	117 min
Apr 15, 2:30 AM EDT	Mesoscale Discussion	SPC	Northampton	60 min
Apr 14, 8:31 PM EDT	Mesoscale Discussion	SPC	Alleghany, Bland, Craig, Giles, Montgomery, Pulaski and 5 more	59 min

Nearby

Mesoscale Discussions in Virginia, 2019 Mesoscale Discussions in North Carolina, 2019 Mesoscale Discussions in South Carolina, 2019 Every mesoscale discussion in 2019

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.