Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 358
The Storm Prediction Center issued this mesoscale discussion at Mar 25, 2012, 12:33 AM EDT for 13 counties in Georgia; 4 counties in North Carolina; 12 counties in South Carolina. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Mar 25, 2012, 12:33 AM EDT (04:33 UTC)
- Expired
- Mar 25, 2012, 1:30 AM EDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 29 counties
Brantley County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Effingham County, GA, Glynn County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA, Bladen County, NC, Brunswick County, NC, Columbus County, NC, Robeson County, NC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Jasper County, SC, Marion County, SC, Williamsburg County, SC
The radar
The Charleston,SC radar (KCLX), 81 km from the middle of the area, began a volume at 04:37 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 00:00Z, 4.6 hours before the alert went out and 20 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
- 218 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 911 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 205 m²/s²
- 0-3 km storm-relative helicity
- 213 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
889
ACUS11 KWNS 250433
SWOMCD
SPC MCD 250433
NCZ000-SCZ000-GAZ000-250530-
MESOSCALE DISCUSSION 0358
NWS STORM PREDICTION CENTER NORMAN OK
1133 PM CDT SAT MAR 24 2012
AREAS AFFECTED...SERN NC...ERN SC...SERN GA
CONCERNING...SEVERE THUNDERSTORM WATCH 110...
VALID 250433Z - 250530Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 110
CONTINUES.
AS CONVECTION ACROSS WW110 CONTINUES TO OUTPACE A ZONE OF STEEPER
MID-LEVEL LAPSE RATES OVER CNTRL SC...ONGOING CLUSTERS OF CONVECTION
WILL CONTINUE TO DECREASE IN INTENSITY AND ORGANIZATION WHILE
APPROACHING THE COAST. STRONG STORMS...OR PERHAPS A
MARGINAL/ISOLATED SVR STORM...CANNOT BE RULED OUT AT THE LEADING
EDGE OF CONVECTIVE OUTFLOW OWING TO 35-45 KT OF EFFECTIVE BULK SHEAR
PERSISTING ACROSS THE AREA. HOWEVER...NOCTURNAL STABILIZATION AND
CONVECTIVE OVERTURNING APPEAR TO BE PLAYING MAJOR ROLES IN THE
DOWNWARD TREND IN ONGOING CONVECTION. AS SUCH...THE WW MAY BE
CANCELLED PRIOR TO THE 06Z EXPIRATION TIME...PARTICULARLY FOLLOWING
THE PASSAGE OF STRONGER CONVECTION CURRENTLY APPROACHING THE COAST.
SOUTH OF WW110...A BAND OF STRONG STORMS OVER SERN GA WILL ALSO
LIKELY WEAKEN WHILE APPROACHING THE COAST AFTER 05Z. WHILE GUSTY
WINDS AND SMALL HAIL WILL BE POSSIBLE WITH THIS ACTIVITY...IT IS
EXPECTED TO REMAIN BELOW SEVERE LIMITS.
..COHEN.. 03/25/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILM...CHS...CAE...JAX...
LAT...LON 34127810 32937896 32247997 30948149 30698246 31238285
32018175 32708107 33648018 34667909 34717842 34127810SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 8:43 PM EDT | Severe Thunderstorm Watch | SPC | Bulloch, Burke, Candler, Effingham, Jenkins, Screven | 5 hr |
| Mar 24, 10:20 PM EDT | Mesoscale Discussion | SPC | Bulloch, Burke, Candler, Effingham, Jenkins, Screven | 115 min |
| Mar 24, 10:23 PM EDT | Mesoscale Discussion | SPC | Bertie, Edgecombe, Franklin, Greene, Halifax, Hertford and 8 more | 97 min |
| Mar 25, 12:31 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Carteret, Chowan and 26 more | 2 hr |
| Mar 25, 5:56 PM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Carteret, Columbus, Craven, Dare and 7 more | 94 min |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in South Carolina, 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.