Alert archive / Georgia / Mesoscale Discussions in 2007
Mesoscale Discussion 596
The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2007, 2:12 PM CDT for 18 counties in Alabama; 8 counties in Florida; 34 counties in Georgia. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2007, 2:12 PM CDT (19:12 UTC)
- Expired
- Apr 26, 2007, 3:15 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 60 counties
Barbour County, AL, Bullock County, AL, Chambers County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Tallapoosa County, AL, Bay County, FL, Calhoun County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Carroll County, GA, Chattahoochee County, GA, Clay County, GA, Coweta County, GA, Crawford County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Fayette County, GA, Harris County, GA, Heard County, GA, Lamar County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Muscogee County, GA, Pike County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Troup County, GA, Upson County, GA, Webster County, GA
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.2 hours before the alert went out and 173 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
- 17 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 947 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 261912 SWOMCD SPC MCD 261912 GAZ000-FLZ000-ALZ000-262015- MESOSCALE DISCUSSION 0596 NWS STORM PREDICTION CENTER NORMAN OK 0212 PM CDT THU APR 26 2007 AREAS AFFECTED...SERN AL/WRN FL PANHANDLE/SWRN CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 261912Z - 262015Z ...THERE IS SOME POTENTIAL THIS AFTN FOR ISOLD SVR TSTMS THIS AFTN. THE MAIN THREATS ARE STRONG/SVR WIND GUSTS OR BRIEF TORNADOES... DEEPLY SHEARED ENVIRONMENT CONTINUES TO BE FAVORABLE FOR STRONG/ROTATING UPDRAFTS AS NOTED ON AREA RADARS. OF PARTICULAR INTEREST WAS A STORM JUST NORTHEAST OF TOI EXITING NRN BULLOCK CO ALABAMA. THIS CELL HAD EXHIBITED A PERSISTENT LOW LEVEL ROTATION...AND EARLIER HAD A REPORT OF FUNNEL CLOUD. ANOTHER POTENTIAL CELL IS JUST WEST OF TOI...AT THE NRN BREAK IN THE CONVECTIVE LINE SEGMENT. AREA VAD WIND DATA FROM MONTGOMERY AL AND ATLANTA IS SUPPORTIVE OF ROTATING CELLS...AND THE MAIN ISSUE THUS FAR HAS BEEN THE INSTABILITY. SFC DEWPOINTS DROP OFF INTO 40S/50S IN CNTRL/SRN GA...AND APPEARS THE GREATEST THREAT WILL REMAIN ACROSS SERN AL AND THE WRN FL PANHANDLE...WHERE DEWPOINTS ARE IN THE MID/UPPER 60S. WATCH MAY BE POSSIBLE FOR AREAS WHICH HAVE HEATED UP AHEAD OF THIS CONVECTIVE LINE NOW EXTENDING INTO THE WRN FL PANHANDLE. ..TAYLOR.. 04/26/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FFC...TAE...BMX...MOB... 30778459 29788539 30408728 32868605 33718520 33658451 32988391 32058383
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 11:50 PM CDT | Mesoscale Discussion | SPC | Mobile, Washington | 85 min |
| Apr 26, 12:41 AM CDT | Tornado Watch | SPC | Baldwin, Choctaw, Clarke, Mobile, Washington | 7 hr |
| Apr 26, 4:46 AM CDT | Mesoscale Discussion | SPC | Baldwin, Choctaw, Clarke, Marengo, Mobile, Monroe and 1 more | 89 min |
| Apr 26, 7:12 AM CDT | Mesoscale Discussion | SPC | Baldwin, Clarke, Mobile, Monroe, Washington | 93 min |
| Apr 26, 2:42 PM CDT | Tornado Watch | SPC | Barbour, Bullock, Coffee, Dale, Geneva, Henry and 3 more | 3 hr |
| Apr 26, 4:33 PM CDT | Mesoscale Discussion | SPC | Cherokee, DeKalb, Etowah, Jackson, Marshall | 57 min |
| Apr 26, 4:53 PM CDT | Tornado Watch | SPC | DeKalb, Jackson, Marshall | 5 hr |
| Apr 26, 5:26 PM CDT | Mesoscale Discussion | SPC | Henry, Houston | 64 min |
Nearby
Mesoscale Discussions in Georgia, 2007Mesoscale Discussions in Alabama, 2007Mesoscale Discussions in Florida, 2007Every mesoscale discussion in 2007
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.