Alert archive / North Carolina / Mesoscale Discussions in 2012
Mesoscale Discussion 1446
The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2012, 7:17 PM EDT for 31 counties in North Carolina; Horry County, Marion County, South Carolina; 10 counties in Virginia. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2012, 7:17 PM EDT (23:17 UTC)
- Expired
- Jul 9, 2012, 8:45 PM EDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 43 counties
Alamance County, NC, Beaufort County, NC, Bertie County, NC, Brunswick County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Currituck County, NC, Durham County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Halifax County, NC, Hertford County, NC, Hyde County, NC, Jones County, NC, Martin 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, Tyrrell County, NC, Vance County, NC, Warren County, NC, Washington County, NC, Horry County, SC, Marion County, SC, Brunswick County, VA, City of Chesapeake, VA, City of Emporia, VA, City of Franklin, VA, City of Suffolk, VA, Greensville County, VA, Isle of Wight County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA
The radar
The Raleigh/Durham radar (KRAX), 62 km from the middle of the area, began a volume at 23:21 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, 11.3 hours before the alert went out and 116 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
- 2733 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 914 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 33 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 |
|---|---|---|---|---|
| Jul 9, 1:01 PM EDT | Mesoscale Discussion | SPC | Alexander, Avery, Buncombe, Burke, Caldwell, Catawba and 20 more | 89 min |
| Jul 9, 1:36 PM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Caswell, Chatham, Chowan and 35 more | 54 min |
| Jul 9, 2:59 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Beaufort, Bertie, Bladen, Camden, Carteret and 45 more | 7 hr |
| Jul 9, 3:19 PM EDT | Severe Thunderstorm Watch | SPC | Alleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more | 4 hr |
| Jul 9, 4:48 PM EDT | Mesoscale Discussion | SPC | Anson, Beaufort, Bertie, Bladen, Camden, Chowan and 39 more | 87 min |
| Jul 9, 5:53 PM EDT | Mesoscale Discussion | SPC | Alamance, Alleghany, Caswell, Davie, Forsyth, Guilford and 7 more | 97 min |
| Jul 9, 12:09 AM EDT | Mesoscale Discussion | SPC | Arlington, Caroline, Clarke, Culpeper, Fairfax, Fauquier and 21 more | 96 min |
Nearby
Mesoscale Discussions in North Carolina, 2012Mesoscale Discussions in Virginia, 2012Mesoscale Discussions in South Carolina, 2012Every mesoscale discussion in 2012
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.