Alert archive / North Carolina / Mesoscale Discussions in 2009
Mesoscale Discussion 737
The Storm Prediction Center issued this mesoscale discussion at May 6, 2009, 7:29 PM EDT for 46 counties in North Carolina; 7 counties in South Carolina; 44 counties in Virginia. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- May 6, 2009, 7:29 PM EDT (23:29 UTC)
- Expired
- May 6, 2009, 9:00 PM EDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 97 counties
Alamance County, NC, Anson County, NC, Bertie County, NC, Cabarrus County, NC, Caswell County, NC, Chatham County, NC, Chowan County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Gaston County, NC, Gates County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Iredell County, NC, Johnston County, NC, Lee County, NC, Lincoln County, NC, Martin County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Pasquotank County, NC, Perquimans County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Rockingham County, NC, Rowan County, NC, Stanly County, NC, Union County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wilson County, NC, Cherokee County, SC, Chester County, SC, Lancaster County, SC, Laurens County, SC, Spartanburg County, SC, Union County, SC, York County, SC, Amelia County, VA, Brunswick County, VA, Charles City County, VA, Charlotte County, VA, Chesterfield County, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Danville, 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 Williamsburg, VA, Dinwiddie County, VA, Gloucester County, VA, Greensville County, VA, Halifax 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, Lunenburg County, VA, Mathews County, VA, Mecklenburg County, VA, Middlesex County, VA, New Kent County, VA, Northumberland County, VA, Nottoway County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, York County, VA
The radar
The Raleigh/Durham radar (KRAX), 93 km from the middle of the area, began a volume at 23:32 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, 11.5 hours before the alert went out and 47 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 450 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| May 5, 8:43 PM EDT | Mesoscale Discussion | SPC | Anson, Bertie, Chatham, Chowan, Cumberland, Durham and 30 more | 62 min |
| May 6, 8:47 AM EDT | Mesoscale Discussion | SPC | Scotland | 88 min |
| May 6, 11:40 AM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Caswell, Chatham, Cleveland and 32 more | 2 hr |
| May 6, 2:16 PM EDT | Tornado Watch | SPC | Alamance, Alexander, Anson, Bertie, Buncombe, Burke and 52 more | 6 hr |
| May 6, 10:27 AM EDT | Tornado Watch | SPC | Anderson, Oconee, Pickens | 9 hr |
| May 6, 2:57 PM EDT | Mesoscale Discussion | SPC | Abbeville | 93 min |
| May 6, 5:47 PM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Calhoun, Colleton and 9 more | 58 min |
Nearby
Mesoscale Discussions in North Carolina, 2009Mesoscale Discussions in Virginia, 2009Mesoscale Discussions in South Carolina, 2009Every mesoscale discussion in 2009
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.