Alert archive / North Carolina / Mesoscale Discussions in 2018
Mesoscale Discussion 1449
The Storm Prediction Center issued this mesoscale discussion at Sep 14, 2018, 11:26 AM EDT for 25 counties in North Carolina; City of Chesapeake, Virginia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 14, 2018, 11:26 AM EDT (15:26 UTC)
- Expired
- Sep 14, 2018, 1:30 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Beaufort County, NC, Bertie County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Craven County, NC, Currituck County, NC, Dare County, NC, Edgecombe County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Hertford County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Pamlico County, NC, Pasquotank County, NC, Perquimans County, NC, Pitt County, NC, Tyrrell County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, City of Chesapeake, VA
The radar
The Morehead City radar (KMHX), 73 km from the middle of the area, began a volume at 15:27 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 nearest sounding before it
Newport, NC (KMHX), launched 12:00Z, 3.4 hours before the alert went out and 72 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
- 370 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 567 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 238 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.5
- 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 |
|---|---|---|---|---|
| Sep 13, 8:25 PM EDT | Mesoscale Discussion | SPC | Beaufort, Carteret, Craven, Hyde, Jones, Onslow and 1 more | 2 hr |
| Sep 13, 8:59 PM EDT | Tornado Watch | SPC | Beaufort, Carteret, Craven, Dare, Duplin, Greene and 9 more | 10 hr |
| Sep 14, 12:56 AM EDT | Mesoscale Discussion | SPC | Beaufort, Carteret, Craven, Dare, Duplin, Greene and 9 more | 3 hr |
| Sep 14, 6:02 AM EDT | Mesoscale Discussion | SPC | Beaufort, Carteret, Craven, Dare, Duplin, Hyde and 9 more | 88 min |
| Sep 14, 6:58 AM EDT | Tornado Watch | SPC | Beaufort, Bertie, Carteret, Chowan, Craven, Dare and 20 more | 10 hr |
| Sep 14, 3:42 PM EDT | Mesoscale Discussion | SPC | Beaufort, Carteret, Craven, Duplin, Edgecombe, Greene and 10 more | 2 hr |
| Sep 14, 4:48 PM EDT | Tornado Watch | SPC | Beaufort, Carteret, Craven, Cumberland, Duplin, Edgecombe and 13 more | 6 hr |
| Sep 14, 7:09 PM EDT | Mesoscale Discussion | SPC | Alamance, Caswell, Durham, Granville, Halifax, Northampton and 4 more | 2 hr |
Nearby
Mesoscale Discussions in North Carolina, 2018Mesoscale Discussions in Virginia, 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.