Alert archive / Virginia / Mesoscale Discussions in 2020
Mesoscale Discussion 293
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2020, 2:07 PM EDT for 19 counties in North Carolina; 30 counties in Virginia. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2020, 2:07 PM EDT (18:07 UTC)
- Expired
- Apr 7, 2020, 3:00 PM EDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 49 counties
Alamance County, NC, Bertie County, NC, Caswell County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Halifax County, NC, Hertford County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Person County, NC, Rockingham County, NC, Stokes County, NC, Vance County, NC, Warren County, NC, Wilson County, NC, Appomattox County, VA, Bedford County, VA, Brunswick County, VA, Campbell County, VA, Charlotte County, VA, City of Danville, VA, City of Emporia, VA, City of Franklin, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Dinwiddie County, VA, Floyd County, VA, Franklin County, VA, Greensville County, VA, Halifax County, VA, Henry County, VA, Lunenburg County, VA, Mecklenburg County, VA, Montgomery County, VA, Nottoway County, VA, Patrick County, VA, Pittsylvania County, VA, Prince Edward County, VA, Pulaski County, VA, Roanoke County, VA, Southampton County, VA, Sussex County, VA
The radar
The Raleigh/Durham radar (KRAX), 98 km from the middle of the area, began a volume at 18:07 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, 6.1 hours before the alert went out and 115 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.
- Mixed-layer CAPE
- 6 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 1126 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 2:57 PM EDT | Mesoscale Discussion | SPC | Accomack, Albemarle, Arlington, Augusta, Caroline, Clarke and 44 more | 93 min |
Nearby
Mesoscale Discussions in Virginia, 2020Mesoscale Discussions in North Carolina, 2020Every mesoscale discussion in 2020
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.