Alert archive / North Carolina / Mesoscale Discussions in 2012
Mesoscale Discussion 1765
The Storm Prediction Center issued this mesoscale discussion at Aug 15, 2012, 2:01 PM EDT for 44 counties in North Carolina; 4 counties in Virginia. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2012, 2:01 PM EDT (18:01 UTC)
- Expired
- Aug 15, 2012, 3:30 PM EDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 48 counties
Alamance County, NC, Anson County, NC, Beaufort County, NC, Bertie County, NC, Cabarrus County, NC, Camden County, NC, Chatham County, NC, Chowan County, NC, Cumberland County, NC, Currituck County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Pasquotank County, NC, Perquimans County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Tyrrell County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, City of Chesapeake, VA, City of Franklin, VA, City of Suffolk, VA, Southampton County, VA
The radar
The Raleigh/Durham radar (KRAX), 18 km from the middle of the area, began a volume at 17:53 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, 6.0 hours before the alert went out and 117 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
- 146 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 1222 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 2:34 PM EDT | Severe Thunderstorm Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 46 more | 6 hr |
| Aug 15, 4:34 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bladen, Camden, Carteret, Chowan, Columbus and 15 more | 86 min |
Nearby
Mesoscale Discussions in North Carolina, 2012Mesoscale Discussions in Virginia, 2012Every mesoscale discussion in 2012
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.