Alert archive / North Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 651
The Storm Prediction Center issued this mesoscale discussion at May 4, 2017, 11:24 PM EDT for 13 counties in North Carolina; 10 counties in South Carolina. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- May 4, 2017, 11:24 PM EDT (03:24 UTC)
- Expired
- May 5, 2017, 12:30 AM EDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 23 counties
Bladen County, NC, Brunswick County, NC, Columbus County, NC, Duplin County, NC, Greene County, NC, Jones County, NC, Lenoir County, NC, New Hanover County, NC, Onslow County, NC, Pender County, NC, Robeson County, NC, Sampson County, NC, Wayne County, NC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Lee County, SC, Marion County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 56 km from the middle of the area, began a volume at 03:27 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
Charleston AFB, SC (KCHS), launched 00:00Z, 3.4 hours before the alert went out and 171 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
- 401 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 781 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 278 m²/s²
- 0-3 km storm-relative helicity
- 329 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 8.3
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 8:49 PM EDT | Tornado Watch | SPC | Bladen, Brunswick, Carteret, Columbus, Craven, Cumberland and 13 more | 6 hr |
| May 5, 2:28 AM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Bladen, Camden, Caswell and 43 more | 92 min |
| May 5, 3:09 AM EDT | Tornado Watch | SPC | Alamance, Anson, Bladen, Brunswick, Carteret, Chatham and 37 more | 6 hr |
| May 5, 5:56 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Chowan, Currituck, Dare and 12 more | 94 min |
| May 5, 6:25 AM EDT | Tornado Watch | SPC | Beaufort, Bertie, Camden, Chowan, Currituck, Dare and 9 more | 5 hr |
| May 5, 8:27 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 9 more | 93 min |
| May 5, 6:15 PM EDT | Mesoscale Discussion | SPC | Halifax, Hertford, Northampton | 90 min |
Nearby
Mesoscale Discussions in North Carolina, 2017Mesoscale Discussions in South Carolina, 2017Every mesoscale discussion in 2017
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.