Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 1932
The Storm Prediction Center issued this mesoscale discussion at Sep 8, 2012, 1:03 PM CDT for 25 counties in Alabama; Holmes County, Jackson County, Florida; 107 counties in Georgia. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Sep 8, 2012, 1:03 PM CDT (18:03 UTC)
- Expired
- Sep 8, 2012, 3:00 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 134 counties
Autauga County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Monroe County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Tallapoosa County, AL, Wilcox County, AL, Holmes County, FL, Jackson County, FL, Atkinson County, GA, Baker County, GA, Baldwin County, GA, Banks County, GA, Barrow County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Burke County, GA, Butts County, GA, Calhoun County, GA, Candler County, GA, Carroll County, GA, Chattahoochee County, GA, Clarke County, GA, Clay County, GA, Clayton County, GA, Cobb County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, DeKalb County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Douglas County, GA, Early County, GA, Elbert County, GA, Emanuel County, GA, Fayette County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Glascock County, GA, Grady County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Hancock County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Irwin County, GA, Jackson County, GA, Jasper County, GA, Jeff Davis County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lee County, GA, Macon County, GA, Madison County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Rockdale County, GA, Schley County, GA, Seminole County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, White County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Worth County, GA
The radar
The Atlanta radar (KFFC), 90 km from the middle of the area, began a volume at 18:06 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.1 hours before the alert went out and 91 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
- 1245 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
118
ACUS11 KWNS 081804
SWOMCD
SPC MCD 081803
GAZ000-FLZ000-ALZ000-082000-
MESOSCALE DISCUSSION 1932
NWS STORM PREDICTION CENTER NORMAN OK
0103 PM CDT SAT SEP 08 2012
AREAS AFFECTED...A LARGE PART OF GA...PARTS OF SRN/ERN AL...PORTIONS
OF THE FL PANHANDLE
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 081803Z - 082000Z
PROBABILITY OF WATCH ISSUANCE...5 PERCENT
SUMMARY...ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE THROUGH THE
AFTERNOON. HOWEVER...THE DISORGANIZED NATURE OF THE CONVECTION AND
ANTICIPATION OF ONLY SPORADIC SVR WIND/MARGINALLY SVR HAIL SHOULD
PRECLUDE WW ISSUANCE.
DISCUSSION...MODIFIED 12Z RAOBS AHEAD OF A COLD FRONT INDICATE
1500-2500 J/KG OF MLCAPE OWING TO STEEPENING LOW-LEVEL LAPSE RATES
AMIDST RICH LOW-LEVEL MOISTURE -- I.E. SFC DEWPOINTS IN THE LOWER
70S. LIFT INVOF THE COLD FRONT -- AIDED BY CROSS-FRONTAL
DIFFERENTIAL HEATING -- AND ALONG SUBTLE CONVERGENCE
BANDS/CONVECTIVE OUTFLOW WITHIN THE WARM SECTOR WILL FOSTER
SCATTERED THUNDERSTORMS THROUGH THE AFTERNOON. HOWEVER...WITH THE
REGION RESIDING WELL TO THE SOUTH OF RELATIVELY STRONGER MID-LEVEL
HEIGHT FALLS/FORCING FOR ASCENT...MID-LEVEL FLOW AND MID-LEVEL LAPSE
RATES WILL BE LIMITED. ALSO...GIVEN GENERALLY AOB 25 KT OF EFFECTIVE
BULK SHEAR AHEAD OF THE FRONT...STORMS SHOULD REMAIN PREDOMINANTLY
DISORGANIZED...WITH SPORADIC INSTANCES OF DMGG WIND GUSTS -- AIDED
BY PRECIP LOADING -- AND MARGINALLY SVR HAIL POSSIBLE.
..COHEN/THOMPSON.. 09/08/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...CAE...GSP...JAX...FFC...TAE...BMX...MOB...
LAT...LON 33088195 31908211 30858337 30688650 31278753 31918764
32618670 33668510 34678381 34368298 33088195SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 11:36 PM CDT | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone, Morgan | 84 min |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in Alabama, 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.