Alert archive / North Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 387
The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2017, 2:08 PM EDT for 19 counties in North Carolina; 11 counties in Virginia. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2017, 2:08 PM EDT (18:08 UTC)
- Expired
- Mar 31, 2017, 3:15 PM EDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 30 counties
Alamance County, NC, Caswell County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Hertford 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, Brunswick County, VA, City of Danville, VA, City of Emporia, VA, City of Martinsville, VA, Greensville County, VA, Halifax County, VA, Henry County, VA, Mecklenburg County, VA, Pittsylvania County, VA, Southampton County, VA, Sussex County, VA
The radar
The Raleigh/Durham radar (KRAX), 87 km from the middle of the area, began a volume at 18:09 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.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.1 hours before the alert went out and 109 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
- 380 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 614 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.7
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 |
|---|---|---|---|---|
| Mar 31, 12:53 AM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, New Hanover, Pender, Robeson and 1 more | 2 hr |
| Mar 31, 9:57 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 31 more | 2 hr |
| Mar 31, 3:54 PM EDT | Tornado Watch | SPC | Bertie, Camden, Chowan, Currituck, Gates, Granville and 8 more | 6 hr |
| Mar 31, 6:11 PM EDT | Mesoscale Discussion | SPC | Bertie, Camden, Chowan, Currituck, Gates, Hertford and 3 more | 94 min |
Nearby
Mesoscale Discussions in North Carolina, 2017Mesoscale Discussions in Virginia, 2017Every mesoscale discussion in 2017
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.