Alert archive / North Carolina / Mesoscale Discussions in 2018
Mesoscale Discussion 1508
The Storm Prediction Center issued this mesoscale discussion at Sep 27, 2018, 5:47 PM EDT for 23 counties in North Carolina; 5 counties in South Carolina. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Sep 27, 2018, 5:47 PM EDT (21:47 UTC)
- Expired
- Sep 27, 2018, 7:15 PM EDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 28 counties
Alamance County, NC, Anson County, NC, Chatham County, NC, Cumberland County, NC, Durham County, NC, Franklin County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Wake County, NC, Wayne County, NC, Wilson County, NC, Chesterfield County, SC, Darlington County, SC, Dillon County, SC, Lee County, SC, Marlboro County, SC
The radar
The Raleigh/Durham radar (KRAX), 82 km from the middle of the area, began a volume at 21:51 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.8 hours before the alert went out and 97 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
- 363 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 616 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 |
|---|---|---|---|---|
| Sep 27, 2:20 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Chatham, Cumberland, Davidson and 16 more | 2 hr |
| Sep 27, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | Alexander, Cabarrus, Catawba, Cleveland, Davie, Gaston and 6 more | 4 hr |
| Sep 27, 7:34 PM EDT | Mesoscale Discussion | SPC | Cleveland, Gaston, Polk, Rutherford | 56 min |
| Sep 27, 5:34 PM EDT | Mesoscale Discussion | SPC | Abbeville, Anderson, Chester, Edgefield, Fairfield, Greenwood and 5 more | 116 min |
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.