Alert archive / North Carolina / Mesoscale Discussions in 2009
Mesoscale Discussion 2045
The Storm Prediction Center issued this mesoscale discussion at Sep 28, 2009, 4:44 PM EDT for 32 counties in North Carolina; 19 counties in Virginia. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Sep 28, 2009, 4:44 PM EDT (20:44 UTC)
- Expired
- Sep 28, 2009, 5:45 PM EDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 51 counties
Alamance County, NC, Anson County, NC, Cabarrus County, NC, Caswell County, NC, Chatham 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, Harnett County, NC, Iredell County, NC, Lee County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Orange 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, Amelia County, VA, Brunswick County, VA, Charlotte County, VA, Chesterfield County, VA, City of Colonial Heights, VA, City of Danville, VA, City of Emporia, VA, City of Hopewell, VA, City of Petersburg, VA, Dinwiddie County, VA, Greensville County, VA, Halifax County, VA, Lunenburg County, VA, Mecklenburg County, VA, Nottoway County, VA, Prince Edward County, VA, Prince George County, VA, Southampton County, VA, Sussex County, VA
The radar
The Raleigh/Durham radar (KRAX), 88 km from the middle of the area, began a volume at 20:46 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, 8.7 hours before the alert went out and 53 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
- 1519 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 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 |
|---|---|---|---|---|
| Sep 28, 5:47 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Bertie, Camden, Chatham, Chowan, Currituck and 23 more | 4 hr |
Nearby
Mesoscale Discussions in North Carolina, 2009Mesoscale Discussions in Virginia, 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.