Alert archive / North Carolina / Mesoscale Discussions in 2012
Mesoscale Discussion 882
The Storm Prediction Center issued this mesoscale discussion at May 23, 2012, 7:32 PM EDT for 43 counties in North Carolina; 7 counties in South Carolina. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- May 23, 2012, 7:32 PM EDT (23:32 UTC)
- Expired
- May 23, 2012, 8:30 PM EDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 50 counties
Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Chatham County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Moore County, NC, Nash County, NC, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Tyrrell County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Horry County, SC, Marion County, SC, Marlboro County, SC, Williamsburg County, SC
The radar
The Raleigh/Durham radar (KRAX), 71 km from the middle of the area, began a volume at 23:34 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
Newport, NC (KMHX), launched 12:00Z, 11.5 hours before the alert went out and 137 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
- 1227 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 677 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
013
ACUS11 KWNS 232332
SWOMCD
SPC MCD 232332
NCZ000-VAZ000-SCZ000-240030-
MESOSCALE DISCUSSION 0882
NWS STORM PREDICTION CENTER NORMAN OK
0632 PM CDT WED MAY 23 2012
AREAS AFFECTED...NORTHEAST SC/CENTRAL AND ERN NC
CONCERNING...SEVERE THUNDERSTORM WATCH 292...
VALID 232332Z - 240030Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 292
CONTINUES.
SUMMARY...SEVERE THREAT ACROSS WW 292 IS NOW PRIMARILY CONFINED
ACROSS NERN NC WITH AN ISOLATED THREAT ELSEWHERE. SEVERE THREAT
SHOULD CONTINUE FOR THE NEXT 1-2 HOURS BUT ISSUANCE OF A NEW WW IS
NOT EXPECTED BEYOND SCHEDULED EXPIRATION TIME OF 01Z.
DISCUSSION...MULTICELL THUNDERSTORMS CONTINUE ACROSS PORTIONS OF WW
292 WITH THE STRONGEST STORMS LOCATED IN NERN NC IN A NARROW ZONE OF
ASCENT ASSOCIATED WITH THE UPPER LOW. MODEST INSTABILITY AND WEAK
FLOW WILL LIMIT STORM ORGANIZATION AND A MULTICELL/PULSE STORM MODE
IS EXPECTED TO CONTINUE AS THESE STORMS PROPAGATE NWD.
BRIEF/ISOLATED SEVERE THREAT MAY EXIST WITH A FEW OF THESE STORMS
OVER THE NEXT 1-2 HOURS BUT THE OVERALL THREAT IS WANING AS
INSTABILITY DECREASES. GIVEN EXPECTED ISOLATED AND SHORT-LIVED
NATURE OF ANY SEVERE THREAT...A NEW WW IS NOT EXPECTED.
..MOSIER.. 05/23/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...AKQ...MHX...RAH...ILM...CAE...
LAT...LON 33958023 34488021 35327978 36287863 36597769 36417655
36027585 35627585 34967648 33427879 33507989 33958023SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 1:15 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Chatham, Chowan, Columbus and 31 more | 60 min |
| May 23, 1:44 PM EDT | Severe Thunderstorm Watch | SPC | Anson, Beaufort, Bertie, Bladen, Brunswick, Camden and 46 more | 7 hr |
| May 23, 4:54 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Chatham and 42 more | 66 min |
Nearby
Mesoscale Discussions in North Carolina, 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.