Alert archive / North Carolina / Mesoscale Discussions in 2018
Mesoscale Discussion 1564
The Storm Prediction Center issued this mesoscale discussion at Oct 11, 2018, 4:34 AM EDT for 28 counties in North Carolina; 23 counties in South Carolina. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Oct 11, 2018, 4:34 AM EDT (08:34 UTC)
- Expired
- Oct 11, 2018, 5:30 AM EDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 51 counties
Anson County, NC, Bladen County, NC, Brunswick County, NC, Cabarrus County, NC, Chatham County, NC, Columbus County, NC, Cumberland County, NC, Duplin County, NC, Gaston County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, New Hanover County, NC, Onslow County, NC, Pender County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rowan County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Wayne County, NC, Berkeley County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon 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, Richland County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC
The radar
The Columbia radar (KCAE), 124 km from the middle of the area, began a volume at 08:34 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 nearest sounding before it
Charleston AFB, SC (KCHS), launched 00:00Z, 8.6 hours before the alert went out and 172 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
- 846 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 746 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.6
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 |
|---|---|---|---|---|
| Oct 10, 11:08 PM EDT | Mesoscale Discussion | SPC | Anson, Union | 97 min |
| Oct 11, 8:31 AM EDT | Mesoscale Discussion | SPC | Alamance, Bladen, Caswell, Chatham, Cumberland, Duplin and 25 more | 89 min |
| Oct 11, 9:58 AM EDT | Tornado Watch | SPC | Alamance, Beaufort, Bertie, Bladen, Brunswick, Camden and 49 more | 13 hr |
| Oct 11, 12:48 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 28 more | 117 min |
| Oct 11, 3:54 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Caswell, Chowan, Currituck and 18 more | 2 hr |
| Oct 10, 11:38 PM EDT | Tornado Watch | SPC | Abbeville, Aiken, Allendale, Bamberg, Barnwell, Beaufort and 36 more | 7 hr |
Nearby
Mesoscale Discussions in North Carolina, 2018Mesoscale Discussions in South Carolina, 2018Every mesoscale discussion in 2018
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.