Alert archive / South Carolina / Mesoscale Discussions in 2012
Mesoscale Discussion 1334
The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2012, 1:39 PM EDT for Burke County, Columbia County, Richmond County, Georgia; 30 counties in North Carolina; 42 counties in South Carolina. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Jul 1, 2012, 1:39 PM EDT (17:39 UTC)
- Expired
- Jul 1, 2012, 3:15 PM EDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 75 counties
Burke County, GA, Columbia County, GA, Richmond County, GA, Alexander County, NC, Anson County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Catawba County, NC, Cleveland County, NC, Columbus County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Gaston County, NC, Henderson County, NC, Hoke County, NC, Iredell County, NC, Lincoln County, NC, McDowell County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Polk County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rowan County, NC, Rutherford County, NC, Scotland County, NC, Stanly County, NC, Transylvania County, NC, Union County, NC, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Greenville County, SC, Greenwood County, SC, Hampton County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC
The radar
The Columbia radar (KCAE), 79 km from the middle of the area, began a volume at 17:40 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 5.7 hours before the alert went out and 184 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
- 1262 J/kg
- Mixed-layer CIN
- -246 J/kg
- Mixed-layer LCL
- 2188 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
983
ACUS11 KWNS 011740
SWOMCD
SPC MCD 011739
NCZ000-SCZ000-GAZ000-011915-
MESOSCALE DISCUSSION 1334
NWS STORM PREDICTION CENTER NORMAN OK
1239 PM CDT SUN JUL 01 2012
AREAS AFFECTED...WRN/SRN NC...SC
CONCERNING...SEVERE THUNDERSTORM WATCH 442...
VALID 011739Z - 011915Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 442
CONTINUES.
SUMMARY...ADDITIONAL WW ISSUANCE TO THE S/W OF WW 442 WILL BE LIKELY
IN THE NEXT HOUR OR TWO.
DISCUSSION...CU IS GROWING OVER THE HIGHER TERRAIN IN WRN NC AND
FARTHER SE INTO PARTS OF THE SC PIEDMONT. THIS DEVELOPMENT IS
OCCURRING WITHIN A STRONGLY TO EXTREMELY UNSTABLE AIR MASS WITH HOT
SURFACE TEMPERATURES IN THE MIDDLE 90S TO NEAR 105. ALTHOUGH
MID-LEVEL FLOW WEAKENS WITH SRN EXTENT OWING TO ANTICYCLONE CENTERED
OVER CNTRL GA...THE VERY STEEP LOW/MID-LEVEL LAPSE RATES WILL
SUPPORT HYBRID PULSE/MULTICELL STORMS CAPABLE OF BOTH LARGE HAIL AND
SEVERE MICROBURSTS. WITH TIME...CELL MERGERS MAY YIELD A
S/SEWD-PROPAGATING MCS DRIVEN BY INTENSE CONVECTIVE OUTFLOW.
..GRAMS.. 07/01/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RAH...ILM...CHS...CAE...GSP...
LAT...LON 34757854 34067866 33267933 32678017 32578139 33148210
33998247 34648293 35138305 35498290 35818222 35938168
35968065 36078009 35937959 34757854SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Columbia and 11 more | 9 hr |
| Jul 1, 2:08 PM EDT | Mesoscale Discussion | SPC | Baldwin, Barrow, Bartow, Bibb, Butts, Carroll and 62 more | 3 hr |
| Jul 1, 4:15 PM EDT | Mesoscale Discussion | SPC | Baldwin, Bleckley, Bryan, Bulloch, Burke, Candler and 25 more | 90 min |
| Jul 1, 7:39 PM EDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Columbia and 13 more | 96 min |
| Jul 1, 9:27 AM EDT | Mesoscale Discussion | SPC | Alleghany, Ashe, Forsyth, Rockingham, Stokes, Surry and 3 more | 63 min |
| Jul 1, 9:44 AM EDT | Severe Thunderstorm Watch | SPC | Alleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more | 5 hr |
| Jul 1, 11:38 AM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Alleghany, Ashe, Avery, Caldwell and 12 more | 97 min |
| Jul 1, 12:56 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Anson, Beaufort, Bertie, Camden, Carteret and 51 more | 7 hr |
| Jul 1, 2:53 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Camden, Carteret, Chowan and 37 more | 97 min |
| Jul 1, 7:04 PM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Camden, Carteret, Caswell and 40 more | 56 min |
Nearby
Mesoscale Discussions in South Carolina, 2012Mesoscale Discussions in North Carolina, 2012Mesoscale Discussions in Georgia, 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.