Alert archive / South Carolina / Mesoscale Discussions in 2012
Mesoscale Discussion 414
The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2012, 1:48 PM EDT for 4 states. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Apr 2, 2012, 1:48 PM EDT (17:48 UTC)
- Expired
- Apr 2, 2012, 3:15 PM EDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 105 counties
Banks County, GA, Bulloch County, GA, Burke County, GA, Clarke County, GA, Columbia County, GA, Dawson County, GA, Effingham County, GA, Elbert County, GA, Fannin County, GA, Franklin County, GA, Gilmer County, GA, Glascock County, GA, Greene County, GA, Habersham County, GA, Hall County, GA, Hart County, GA, Jackson County, GA, Jefferson County, GA, Jenkins County, GA, Lincoln County, GA, Lumpkin County, GA, Madison County, GA, McDuffie County, GA, Murray County, GA, Oconee County, GA, Oglethorpe County, GA, Rabun County, GA, Richmond County, GA, Screven County, GA, Stephens County, GA, Taliaferro County, GA, Towns County, GA, Union County, GA, Warren County, GA, White County, GA, Wilkes County, GA, Buncombe County, NC, Cherokee County, NC, Clay County, NC, Cleveland County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington 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, Jasper County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, McCormick County, SC, Newberry County, SC, Oconee 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, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Cocke County, TN, Knox County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sevier County, TN
The radar
The Greer radar (KGSP), 70 km from the middle of the area, began a volume at 17:47 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
Charleston AFB, SC (KCHS), launched 12:00Z, 5.8 hours before the alert went out and 244 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
- 313 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1154 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
888
ACUS11 KWNS 021749
SWOMCD
SPC MCD 021748
SCZ000-NCZ000-GAZ000-TNZ000-021915-
MESOSCALE DISCUSSION 0414
NWS STORM PREDICTION CENTER NORMAN OK
1248 PM CDT MON APR 02 2012
AREAS AFFECTED...MUCH OF SC...ERN/NRN GA...ERN TN...WRN NC
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 021748Z - 021915Z
ISOLATED TO SCATTERED THUNDERSTORMS ARE FORECAST TO DEVELOP THIS
AFTERNOON ACROSS MUCH OF SC...ERN/NRN GA...ERN TN AND WRN NC. A FEW
STORMS WILL BE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS.
HOWEVER...AN ORGANIZED SVR WEATHER THREAT IS NOT APPARENT
ATTM...WHICH WILL PRECLUDE THE NEED FOR A WW.
SURFACE OBSERVATIONS AT 17Z SHOW A COLD FRONT LOCATED FROM CNTRL KY
SEWD INTO NC...AND SHORT-TERM MODEL GUIDANCE INDICATES IT WILL ENTER
SC BY MID TO LATE AFTERNOON. THE AIRMASS AHEAD OF THE FRONT IS
CHARACTERIZED BY SURFACE TEMPERATURES IN THE UPR 70S TO MID
80S...WITH DEWPOINTS IN THE MID-UPR 50S TO LOW 60S. WITH ADDITIONAL
SURFACE HEATING...MLCAPE VALUES UP TO 1500 J/KG WILL BE POSSIBLE. IN
ADDITION...LOW-LEVEL LAPSE RATES ARE QUICKLY STEEPENING ACROSS THE
REGION...WHICH APPEARS TO BE AIDING IN CAP REMOVAL AND SUBSEQUENT
DEEPENING CUMULUS OVER THE SRN APPALACHIANS. THIS DESTABILIZATION
WILL FAVOR THUNDERSTORM DEVELOPMENT BOTH ALONG AND AHEAD OF THE COLD
FRONT DURING THE NEXT FEW HRS. DESPITE GENERALLY WEAK NWLY
DEEP-LAYER SHEAR...MODERATE INSTABILITY AND A WELL-MIXED BOUNDARY
LAYER WILL FAVOR MULTICELL CLUSTERS POSING SOME THREAT FOR LARGE
HAIL AND DAMAGING WIND GUSTS DURING THE AFTERNOON.
..GARNER.. 04/02/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RAH...ILM...CHS...CAE...GSP...MRX...FFC...OHX...
LAT...LON 34197901 33177904 31968057 32448203 34028367 35058509
35728536 36098423 35858262 34197901Nearby
Mesoscale Discussions in South Carolina, 2012Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in North 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.