Alert archive / North Carolina / Mesoscale Discussions in 2007
Mesoscale Discussion 503
The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2007, 11:15 AM EDT for 43 counties in North Carolina; 9 counties in South Carolina; 11 counties in Virginia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 15, 2007, 11:15 AM EDT (15:15 UTC)
- Expired
- Apr 15, 2007, 1:15 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 63 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, Hoke 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, Robeson County, NC, Sampson County, NC, Tyrrell County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Berkeley County, SC, Charleston County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Williamsburg County, SC, City of Chesapeake, VA, City of Emporia, VA, City of Franklin, VA, City of Norfolk, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, Greensville County, VA, Isle of Wight County, VA, Southampton County, VA, Sussex County, VA
The radar
The Wilmington radar (KLTX), 85 km from the middle of the area, began a volume at 15:18 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 12:00Z, 3.3 hours before the alert went out and 96 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
- 188 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 594 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 343 m²/s²
- 0-3 km storm-relative helicity
- 397 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.5
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 |
|---|---|---|---|---|
| Apr 14, 10:10 PM EDT | Mesoscale Discussion | SPC | Anson, Union | 95 min |
| Apr 15, 2:01 AM EDT | Tornado Watch | SPC | Bladen, Brunswick, Columbus, New Hanover, Pender, Robeson | 7 hr |
| Apr 15, 3:33 AM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Chatham, Cumberland, Davidson and 21 more | 87 min |
| Apr 15, 7:39 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bladen, Brunswick, Chatham, Columbus, Craven and 26 more | 66 min |
| Apr 15, 8:08 AM EDT | Tornado Watch | SPC | Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 29 more | 7 hr |
| Apr 15, 12:19 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Anson, Cabarrus, Caswell, Catawba and 29 more | 86 min |
| Apr 15, 12:42 PM EDT | Tornado Watch | SPC | Alamance, Alexander, Anson, Bertie, Burke, Cabarrus and 44 more | 7 hr |
| Apr 15, 2:40 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 19 more | 65 min |
| Apr 15, 2:50 PM EDT | Tornado Watch | SPC | Beaufort, Carteret, Craven, Cumberland, Dare, Duplin and 14 more | 5 hr |
| Apr 15, 4:12 PM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Camden, Carteret, Chatham and 41 more | 2 hr |
| Apr 15, 3:57 AM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 12 more | 93 min |
| Apr 15, 10:20 AM EDT | Mesoscale Discussion | SPC | Jasper | 55 min |
Nearby
Mesoscale Discussions in North Carolina, 2007Mesoscale Discussions in Virginia, 2007Mesoscale Discussions in South Carolina, 2007Every mesoscale discussion in 2007
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.