Alert archive / North Carolina / Mesoscale Discussions in 2011
Mesoscale Discussion 2063
The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2011, 11:06 PM EDT for 42 counties in North Carolina; 36 counties in Virginia. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Aug 26, 2011, 11:06 PM EDT (03:06 UTC)
- Expired
- Aug 27, 2011, 12:30 AM EDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 78 counties
Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Dare County, NC, Duplin County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Sampson County, NC, Tyrrell County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Brunswick County, VA, Charles City County, VA, Chesterfield County, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Hopewell, VA, City of Newport News, VA, City of Norfolk, VA, City of Petersburg, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Richmond, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Dinwiddie County, VA, Gloucester County, VA, Greensville County, VA, Henrico County, VA, Isle of Wight County, VA, James City County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Prince George County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, York County, VA
The radar
The Morehead City radar (KMHX), 109 km from the middle of the area, began a volume at 03:08 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
Newport, NC (KMHX), launched 00:00Z, 3.1 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
- 148 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 445 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 361 m²/s²
- 0-3 km storm-relative helicity
- 415 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.9
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 26, 8:11 PM EDT | Tornado Watch | SPC | Beaufort, Brunswick, Carteret, Craven, Dare, Hyde and 6 more | 9 hr |
| Aug 27, 12:32 AM EDT | Tornado Watch | SPC | Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 14 more | 10 hr |
| Aug 27, 3:06 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 14 more | 114 min |
| Aug 27, 7:52 AM EDT | Mesoscale Discussion | SPC | Camden, Currituck, Gates, Pasquotank | 113 min |
| Aug 27, 10:31 AM EDT | Mesoscale Discussion | SPC | Accomack, Mathews, Northampton, York, City of Chesapeake, City of Hampton and 4 more | 29 min |
| Aug 27, 10:41 AM EDT | Tornado Watch | SPC | Accomack, Charles City, Essex, Gloucester, Isle of Wight, James City and 25 more | 9 hr |
| Aug 27, 1:01 PM EDT | Mesoscale Discussion | SPC | Accomack, Charles City, Essex, Gloucester, Isle of Wight, James City and 26 more | 119 min |
Nearby
Mesoscale Discussions in North Carolina, 2011Mesoscale Discussions in Virginia, 2011Every mesoscale discussion in 2011
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.