Alert archive / Georgia / Mesoscale Discussions in 2012
Mesoscale Discussion 2016
The Storm Prediction Center issued this mesoscale discussion at Oct 1, 2012, 3:00 PM CDT for 18 counties in Alabama; 68 counties in Georgia; 14 counties in Tennessee. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 1, 2012, 3:00 PM CDT (20:00 UTC)
- Expired
- Oct 1, 2012, 5:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 100 counties
Blount County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Lee County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Randolph County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Baldwin County, GA, Barrow County, GA, Bartow County, GA, Bibb County, GA, Bleckley County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattahoochee County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Crawford County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Dooly County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jackson County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Lumpkin County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Murray County, GA, Muscogee County, GA, Newton County, GA, Oconee County, GA, Paulding County, GA, Peach County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Putnam County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Troup County, GA, Twiggs County, GA, Union County, GA, Upson County, GA, Walker County, GA, Walton County, GA, Whitfield County, GA, Wilkinson County, GA, Bedford County, TN, Bradley County, TN, Coffee County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Lawrence County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Moore County, TN, Polk County, TN, Sequatchie County, TN
The radar
The Atlanta radar (KFFC), 103 km from the middle of the area, began a volume at 19:59 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, 8.0 hours before the alert went out and 105 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
- 512 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 479 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 240 m²/s²
- 0-3 km storm-relative helicity
- 301 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.5
The text
As transmitted, in the capitals the NWS used until 2016.
200
ACUS11 KWNS 012000
SWOMCD
SPC MCD 012000
GAZ000-NCZ000-TNZ000-ALZ000-012200-
MESOSCALE DISCUSSION 2016
NWS STORM PREDICTION CENTER NORMAN OK
0300 PM CDT MON OCT 01 2012
AREAS AFFECTED...E CENTRAL AND NERN AL/SRN TN/W CENTRAL AND NWRN GA
CONCERNING...TORNADO WATCH 658...
VALID 012000Z - 012200Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 658 CONTINUES.
SUMMARY...ISOLATED TORNADO THREAT CONTINUES ACROSS THE WATCH AREA.
DISCUSSION...STORMS ACROSS THE DISCUSSION AREA HAVE IN GENERAL BEEN
SLOW TO ORGANIZE THUS FAR...WITH ONLY BRIEF/TRANSIENT ROTATION
OBSERVED WITHIN A FEW CELLS OVER THE PAST 1-2 HOURS. THE THREAT HAS
DIMINISHED ACROSS PARTS OF CENTRAL AL IN CONJUNCTION WITH SLOW EWD
ADVANCE OF THE COLD FRONT...BUT POTENTIAL FOR A FEW STRONGER CELLS
CAPABLE OF ISOLATED/BRIEF TORNADOES PERSISTS -- PARTICULARLY FROM
SRN TN/NRN AL ESEWD INTO CENTRAL AND NRN GA.
..GOSS.. 10/01/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MRX...FFC...OHX...BMX...HUN...
LAT...LON 35138424 34288350 32468298 31998420 32838578 35198760
35688688 35498491 35138424SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 9:48 PM CDT | Mesoscale Discussion | SPC | Baldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 3 more | 87 min |
| Oct 1, 1:45 AM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 5 more | 2 hr |
| Oct 1, 5:51 AM CDT | Mesoscale Discussion | SPC | Barbour, Bullock, Calhoun, Chambers, Clay, Cleburne and 20 more | 114 min |
| Oct 1, 12:52 PM CDT | Mesoscale Discussion | SPC | Barbour, Blount, Calhoun, Chambers, Cherokee, Clay and 13 more | 53 min |
| Oct 1, 1:16 PM CDT | Tornado Watch | SPC | Blount, Bullock, Calhoun, Chambers, Cherokee, Clay and 19 more | 7 hr |
| Oct 1, 5:40 PM CDT | Mesoscale Discussion | SPC | Chambers, Cherokee, Cleburne, Lee, Randolph | 95 min |
Nearby
Mesoscale Discussions in Georgia, 2012Mesoscale Discussions in Alabama, 2012Mesoscale Discussions in Tennessee, 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.