Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 1048
The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2012, 5:33 AM CDT for 35 counties in Alabama; 62 counties in Georgia. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jun 4, 2012, 5:33 AM CDT (10:33 UTC)
- Expired
- Jun 4, 2012, 7:00 AM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 97 counties
Autauga County, AL, Barbour County, AL, Bibb County, AL, Blount County, AL, Bullock County, AL, Butler County, AL, Calhoun County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coffee County, AL, Coosa County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Hale County, AL, Henry County, AL, Houston County, AL, Jefferson County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Baker County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brooks County, GA, Butts County, GA, Calhoun County, GA, Carroll County, GA, Chattahoochee County, GA, Clay County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Fayette County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Houston County, GA, Irwin County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Muscogee County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Webster County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 10.6 hours before the alert went out and 100 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
- 815 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1442 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 286 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 8.1
The text
As transmitted, in the capitals the NWS used until 2016.
335
ACUS11 KWNS 041033
SWOMCD
SPC MCD 041033
GAZ000-ALZ000-041200-
MESOSCALE DISCUSSION 1048
NWS STORM PREDICTION CENTER NORMAN OK
0533 AM CDT MON JUN 04 2012
AREAS AFFECTED...E CENTRAL/NERN MS ESEWD ACROSS AL INTO THE SRN HALF
OF GA
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 041033Z - 041200Z
PROBABILITY OF WATCH ISSUANCE...60 PERCENT
SUMMARY...SEVERE THREAT -- MAINLY IN THE FORM OF LOCALLY DAMAGING
WINDS -- MAY INCREASE THIS MORNING AS STORMS ROLL SEWD WITH TIME.
THIS POTENTIAL THREAT MAY REQUIRE WW ISSUANCE.
DISCUSSION...LATEST RADAR LOOP SHOWS A CLUSTER OF STORMS MOVING SEWD
ACROSS NRN MS/NRN AL ATTM...WITH SOME HINTS AT SMALL-SCALE BOW ECHO
DEVELOPMENT ON ERN PORTIONS OF THIS CLUSTER -- OVER NWRN AL.
HIGH-RES CONVECTION-ALLOWING MODELS CONFIRM THIS EVOLUTION OVER THE
NEXT SEVERAL HOURS...WITH SIMULATED REFLECTIVITY OUTPUT TAKING ON AN
INCREASINGLY BOW-SHAPED CONFIGURATION AND SPREADING THE CLUSTER
SEWD/ESEWD ACROSS AL...AND LATER ACROSS CENTRAL AND SRN GA.
KINEMATICALLY...THE NAM HINTS AT AN INCREASE IN WNWLY FLOW IN THE
850 TO 500 MB LAYER THROUGH 12Z AND BEYOND. THIS PROVIDES
ADDITIONAL SUPPORT THAT A MORE WELL-ORGANIZED/BOWING MCS MAY INDEED
EVOLVE...BECOMING ORIENTED PERPENDICULAR TO THE FLOW FIELD ALOFT AND
MOVING QUICKLY SEWD -- ACCOMPANIED BY POTENTIAL FOR LOCALLY DAMAGING
WIND GUSTS. WE WILL CONTINUE TO MONITOR SHORT-TERM EVOLUTION OF THE
CONVECTION ON THE ERN FRINGE OF THIS MCS FOR SIGNS OF INCREASING
ORGANIZATION/BOWING -- WHICH WOULD THEN PROMPT CONSIDERATION OF WW
ISSUANCE ACROSS PARTS OF AL AND GA.
..GOSS/HART.. 06/04/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JAX...FFC...TAE...BMX...HUN...MOB...
LAT...LON 34158650 33908540 33908540 33148329 32818277 31488279
30758351 31248612 32408782 33498808 34158650SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 7:09 PM CDT | Tornado Watch | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone, Morgan | 7 hr |
| Jun 3, 8:34 PM CDT | Mesoscale Discussion | SPC | Colbert, Lauderdale, Lawrence, Limestone | 56 min |
| Jun 3, 11:13 PM CDT | Mesoscale Discussion | SPC | Blount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 10 more | 62 min |
| Jun 4, 3:14 AM CDT | Mesoscale Discussion | SPC | Colbert, Franklin | 91 min |
| Jun 4, 8:43 AM CDT | Mesoscale Discussion | SPC | Barbour, Bullock, Chambers, Elmore, Henry, Lee and 5 more | 2 hr |
| Jun 4, 12:09 PM CDT | Severe Thunderstorm Watch | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 39 more | 3 hr |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in Alabama, 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.