Alert archive / North Carolina / Mesoscale Discussions in 2013
Mesoscale Discussion 539
The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2013, 4:48 PM EDT for 64 counties in North Carolina; 15 counties in South Carolina. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2013, 4:48 PM EDT (20:48 UTC)
- Expired
- Apr 19, 2013, 5:45 PM EDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 79 counties
Alamance County, NC, Anson County, NC, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Cabarrus County, NC, Camden County, NC, Caswell County, NC, Chatham County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Davidson County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Orange County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Person County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rockingham County, NC, Rowan County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Tyrrell County, NC, Union County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Chester County, SC, Chesterfield County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Williamsburg County, SC, York County, SC
The radar
The Raleigh/Durham radar (KRAX), 122 km from the middle of the area, began a volume at 20:50 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, 8.8 hours before the alert went out and 149 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
- 58 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 567 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 243 m²/s²
- 0-3 km storm-relative helicity
- 223 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 |
|---|---|---|---|---|
| Apr 19, 12:35 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Anson, Burke, Cabarrus, Caswell and 29 more | 115 min |
| Apr 19, 2:00 PM EDT | Tornado Watch | SPC | Alamance, Alexander, Anson, Cabarrus, Catawba, Chatham and 31 more | 7 hr |
| Apr 19, 2:31 PM EDT | Tornado Watch | SPC | Caswell, Rockingham, Stokes, Surry, Yadkin | 7 hr |
| Apr 19, 6:27 PM EDT | Severe Thunderstorm Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 29 more | 4 hr |
| Apr 19, 6:54 PM EDT | Mesoscale Discussion | SPC | Bladen, Cumberland, Edgecombe, Franklin, Greene, Halifax and 11 more | 66 min |
| Apr 19, 12:37 PM EDT | Severe Thunderstorm Watch | SPC | Aiken, Bamberg, Barnwell, Calhoun, Clarendon, Edgefield and 6 more | 6 hr |
| Apr 19, 1:57 PM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 12 more | 2 hr |
| Apr 19, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | Allendale, Beaufort, Berkeley, Charleston, Colleton, Dorchester and 2 more | 7 hr |
| Apr 19, 4:29 PM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 9 more | 2 hr |
| Apr 19, 6:37 PM EDT | Mesoscale Discussion | SPC | Beaufort, Berkeley, Charleston, Clarendon, Colleton, Dorchester | 113 min |
Nearby
Mesoscale Discussions in North Carolina, 2013Mesoscale Discussions in South Carolina, 2013Every mesoscale discussion in 2013
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.