Alert archive / North Carolina / Mesoscale Discussions in 2012
Mesoscale Discussion 1627
The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2012, 7:50 PM EDT for 33 counties in North Carolina; 5 counties in Virginia. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2012, 7:50 PM EDT (23:50 UTC)
- Expired
- Jul 27, 2012, 9:15 PM EDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 38 counties
Bertie County, NC, Camden County, NC, Chatham County, NC, Chowan County, NC, Cumberland County, NC, Currituck County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Martin County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Pitt County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, City of Chesapeake, VA, City of Norfolk, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA
The radar
The Raleigh/Durham radar (KRAX), 57 km from the middle of the area, began a volume at 23:52 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, 11.8 hours before the alert went out and 144 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
- 2927 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 43 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 27, 1:08 PM EDT | Mesoscale Discussion | SPC | Rockingham, Stokes, Surry | 67 min |
| Jul 27, 1:54 PM EDT | Mesoscale Discussion | SPC | Avery, Buncombe, Burke, Caldwell, Cherokee, Clay and 11 more | 66 min |
| Jul 27, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Alleghany, Anson, Ashe, Bertie, Camden and 41 more | 8 hr |
| Jul 27, 4:52 PM EDT | Mesoscale Discussion | SPC | Alamance, Alleghany, Caswell, Forsyth, Granville, Guilford and 7 more | 53 min |
| Jul 26, 9:06 PM EDT | Mesoscale Discussion | SPC | Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 17 more | 84 min |
Nearby
Mesoscale Discussions in North Carolina, 2012Mesoscale Discussions in Virginia, 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.