Alert archive / North Carolina / Mesoscale Discussions in 2004
Mesoscale Discussion 2233
The Storm Prediction Center issued this mesoscale discussion at Sep 17, 2004, 1:37 PM EDT for 35 counties in North Carolina; 4 counties in South Carolina; 14 counties in Virginia. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Sep 17, 2004, 1:37 PM EDT (17:37 UTC)
- Expired
- Sep 17, 2004, 3:30 PM EDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 53 counties
Alamance County, NC, Bladen County, NC, Brunswick County, NC, Caswell County, NC, Chatham County, NC, Columbus County, NC, Cumberland County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Lenoir County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rockingham County, NC, Sampson County, NC, Scotland County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC, Dillon County, SC, Horry County, SC, Marion County, SC, Marlboro County, SC, Appomattox County, VA, Brunswick County, VA, Campbell County, VA, Charlotte County, VA, City of Danville, VA, City of Martinsville, VA, Franklin County, VA, Halifax County, VA, Henry County, VA, Lunenburg County, VA, Mecklenburg County, VA, Nottoway County, VA, Pittsylvania County, VA, Prince Edward County, VA
The radar
The Raleigh/Durham radar (KRAX), 44 km from the middle of the area, began a volume at 17:39 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, 5.6 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
- 888 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 551 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 237 m²/s²
- 0-3 km storm-relative helicity
- 297 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.5
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 16, 8:45 PM EDT | Tornado Watch | SPC | Cabarrus, Cleveland, Gaston, Lincoln, Mecklenburg, Polk and 1 more | 6 hr |
| Sep 16, 11:42 PM EDT | Mesoscale Discussion | SPC | Gaston, Mecklenburg | 2 hr |
| Sep 17, 1:51 AM EDT | Mesoscale Discussion | SPC | Alexander, Burke, Caldwell, Catawba, Cleveland, Gaston and 6 more | 84 min |
| Sep 17, 9:26 AM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Bladen, Caswell, Chatham, Cumberland and 24 more | 2 hr |
| Sep 17, 10:10 AM EDT | Tornado Watch | SPC | Alamance, Anson, Bladen, Brunswick, Caswell, Chatham and 37 more | 7 hr |
| Sep 17, 11:03 AM EDT | Mesoscale Discussion | SPC | Alamance, Bertie, Caswell, Chatham, Cumberland, Durham and 26 more | 87 min |
| Sep 17, 12:33 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Chowan, Craven, Gates and 8 more | 117 min |
| Sep 17, 1:15 PM EDT | Tornado Watch | SPC | Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 18 more | 7 hr |
| Sep 17, 3:53 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Chowan, Craven, Edgecombe and 11 more | 2 hr |
| Sep 17, 4:01 PM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, Cumberland, Duplin, Franklin and 6 more | 59 min |
| Sep 17, 4:35 PM EDT | Tornado Watch | SPC | Bladen, Brunswick, Columbus, Duplin, Edgecombe, Franklin and 14 more | 3 hr |
| Sep 17, 6:19 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Chowan, Craven, Currituck and 13 more | 116 min |
| Sep 17, 6:50 PM EDT | Tornado Watch | SPC | Bertie, Camden, Chowan, Currituck, Gates, Hertford and 3 more | 5 hr |
| Sep 17, 7:23 PM EDT | Mesoscale Discussion | SPC | Duplin, Edgecombe, Greene, Halifax, Lenoir, Nash and 4 more | 37 min |
| Sep 17, 3:50 PM EDT | Tornado Watch | SPC | Clarke, Frederick, Loudoun, City of Winchester | 4 hr |
Nearby
Mesoscale Discussions in North Carolina, 2004Mesoscale Discussions in Virginia, 2004Mesoscale Discussions in South Carolina, 2004Every mesoscale discussion in 2004
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.