Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 157
The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2012, 12:50 PM CST for 5 states. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2012, 12:50 PM CST (18:50 UTC)
- Expired
- Feb 24, 2012, 2:15 PM CST
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 144 counties
Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Gulf County, FL, Hamilton County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Wakulla County, FL, Washington County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Calhoun County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Columbia County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Glynn County, GA, Grady County, GA, Hancock County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Lincoln County, GA, Long County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Schley County, GA, Screven County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Taliaferro County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Ware County, GA, Warren County, GA, Washington County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA, Bladen County, NC, Brunswick County, NC, Columbus County, NC, Robeson County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston 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, Hampton County, SC, Horry County, SC, Jasper County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Charleston,SC radar (KCLX), 62 km from the middle of the area, began a volume at 18:50 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, 6.8 hours before the alert went out and 161 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
- 817 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 350 m²/s²
- 0-3 km storm-relative helicity
- 365 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.4
The text
As transmitted, in the capitals the NWS used until 2016.
703
ACUS11 KWNS 241850
SWOMCD
SPC MCD 241850
NCZ000-SCZ000-GAZ000-FLZ000-ALZ000-242015-
MESOSCALE DISCUSSION 0157
NWS STORM PREDICTION CENTER NORMAN OK
1250 PM CST FRI FEB 24 2012
AREAS AFFECTED...A LARGE PART OF SC...SERN NC...CNTRL/ERN/SRN
GA...SERN AL...PARTS OF THE FL PANHANDLE
CONCERNING...TORNADO WATCH 35...37...38...
VALID 241850Z - 242015Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH
35...37...38...CONTINUES.
BANDS/CLUSTERS OF SEVERE THUNDERSTORMS AHEAD OF A COLD FRONT
EXTENDING FROM NRN/CNTRL GA TOWARD SRN AL WILL CONTINUE TO POSE A
THREAT FOR DMGG WIND GUSTS AND TORNADOES. THIS THREAT WILL BE
ENHANCED INVOF A CLUSTER OF STORMS CNTRL SC MOVING ENEWD AROUND 60
KT...WHICH WILL LIKELY REACH NEAR THE SC/NC BORDER AROUND 20Z BEFORE
APPROACHING THE COAST AROUND 2030Z. FARTHER SOUTH...ADDITIONAL
CLUSTERS OF STORMS WILL POSE A SVR THREAT ACROSS SRN GA AND THE FL
PANHANDLE...WITH A SUPERCELLULAR STRUCTURE NOTED WITH THE STORM IN
COLQUITT COUNTY GA. MODIFICATIONS TO THE 18Z CHARLESTON SC SOUNDING
ACROSS THE WARM SECTOR SUGGEST THAT 500-1000 J/KG OF MLCAPE EXIST TO
THE SE OF A NE-SW ORIENTED BAND OF MODERATE STRATIFORM PRECIPITATION
INVOF THE AFOREMENTIONED FRONT. VERY STRONG MID-LEVEL FLOW WILL
CONTINUE TO SUPPORT EFFECTIVE BULK SHEAR MAGNITUDES EXCEEDING 60
KT...WHICH WILL ALLOW THE ORGANIZED STORM STRUCTURES AND A DMGG WIND
THREAT TO EXIST AMIDST THE WARM SECTOR. LOW-LEVEL SHEAR WILL ALSO
SUPPORT THE THREAT FOR TORNADOES...PARTICULARLY WITH ANY SUPERCELL
STRUCTURES. THE SVR THREAT WILL QUICKLY DIMINISH FOLLOWING FRONTAL
PASSAGE...AND COUNTIES CAN BE CLEARED FROM TORNADO WATCHES FOLLOWING
FRONTAL PASSAGE.
..COHEN.. 02/24/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RAH...ILM...CHS...CAE...GSP...JAX...FFC...TAE...
BMX...
LAT...LON 34278191 34877934 34467793 33677808 32657922 30648201
29678522 30468624 31908516 34278191SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 5:56 AM CST | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Calhoun, Chambers and 20 more | 94 min |
| Feb 24, 7:48 AM CST | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bullock, Butler, Chambers and 25 more | 7 hr |
| Feb 24, 9:49 AM CST | Mesoscale Discussion | SPC | Barbour, Bullock, Butler, Chambers, Coffee, Conecuh and 13 more | 56 min |
| Feb 24, 11:04 AM CST | Tornado Watch | SPC | Coffee, Dale, Geneva, Henry, Houston | 7 hr |
| Feb 24, 3:11 PM CST | Mesoscale Discussion | SPC | Coffee, Dale, Geneva, Henry, Houston | 64 min |
| Feb 24, 8:17 AM CST | Tornado Watch | SPC | Franklin, Habersham, Hart, Rabun, Stephens | 7 hr |
| Feb 24, 11:00 AM CST | Mesoscale Discussion | SPC | Fannin, Rabun, Towns, Union | 60 min |
| Feb 24, 2:24 PM CST | Mesoscale Discussion | SPC | Fannin, Rabun, Towns, Union | 66 min |
| Feb 24, 8:05 AM CST | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 29 more | 25 min |
| Feb 24, 10:10 AM CST | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, New Hanover, Onslow, Pender and 1 more | 65 min |
| Feb 24, 11:43 AM CST | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 51 more | 92 min |
| Feb 24, 12:19 PM CST | Tornado Watch | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 55 more | 7 hr |
| Feb 24, 3:45 PM CST | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Bladen, Brunswick, Camden and 51 more | 90 min |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in South Carolina, 2012Mesoscale Discussions in Florida, 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.