Alert archive / Georgia / Mesoscale Discussions in 2004
Mesoscale Discussion 2221
The Storm Prediction Center issued this mesoscale discussion at Sep 16, 2004, 7:03 AM CDT for 38 counties in Alabama; 21 counties in Florida; 46 counties in Georgia. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Sep 16, 2004, 7:03 AM CDT (12:03 UTC)
- Expired
- Sep 16, 2004, 9:00 AM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 105 counties
Autauga County, AL, Baldwin County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Geneva County, AL, Greene County, AL, Hale County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Russell County, AL, Sumter County, AL, Tallapoosa County, AL, Washington County, AL, Wilcox County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Gilchrist County, FL, Gulf County, FL, Hamilton County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Okaloosa County, FL, Santa Rosa County, FL, Suwannee County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Atkinson County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Grady County, GA, Harris County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, Miller County, GA, Mitchell County, GA, Muscogee County, GA, Peach County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Webster County, GA, Worth 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 0.1 hours before the alert went out and 103 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
- 878 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 725 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 428 m²/s²
- 0-3 km storm-relative helicity
- 501 m²/s²
- Significant tornado parameter
- 2.8
- Supercell composite
- 13.3
The text
As transmitted, in the capitals the NWS used until 2016.
300 ACUS11 KWNS 161207 SWOMCD SPC MCD 161203 FLZ000-GAZ000-ALZ000-161400- MESOSCALE DISCUSSION 2221 NWS STORM PREDICTION CENTER NORMAN OK 0703 AM CDT THU SEP 16 2004 AREAS AFFECTED...AL...SWRN GA...FL PNHDL AND PARTS OF NRN FL CONCERNING...TORNADO WATCH 826...827... VALID 161203Z - 161400Z CENTER OF IVAN CONTINUES TO MOVE FARTHER INLAND AND WAS MOVING NNEWD ACROSS MONROE COUNTY ALABAMA EARLY THIS MORNING. EXTENSIVE CONVECTIVE FEEDER BANDS CONTINUE TO PINWHEEL AROUND THE CENTER OF THE DEEP TROPICAL CYCLONE...ESPECIALLY ACROSS THE ERN AND NERN PORTIONS OF THE CIRCULATION. WIND PROFILE DATA OVER A LARGE AREA OF AL/SRN GA AND NRN FL WERE INDICATING VERY INTENSE TO EXTREME VALUES OF 0-1KM HELICITY...ON THE ORDER OF 600-1200 M2/S2. JUST ABOUT ANY CONVECTIVE UPDRAFT IN THIS TROPICAL ENVIRONMENT WILL ACQUIRE ROTATION AND COULD END UP PRODUCING A TORNADO. SOME OF THE MORE INTENSE CELLS HAVE BEEN OCCURRING WITHIN AN OUTER RAINBAND LOCATED FROM CROSS CITY, FL TO NE OF MONTGOMERY, AL. A FEW ROTATING CELLS WITHIN THIS ARC OVER FL AND GA ARE OVER 200 MILES FROM THE CENTER OF IVAN. THIS IS AN INDICATION OF JUST HOW LARGE THE STRONG WIND FIELD IS WITH THIS HURRICANE. ANOTHER BAND OF INTENSE CONVECTION WITH NUMEROUS CG LIGHTNING STRIKES WAS NEAR THE AL/GA LINE. THIS BAND...BEING CLOSER TO THE CENTER OF IVAN IS LIKELY OCCURRING IN AN EVEN MORE SHEARED ENVIRONMENT AND ANY CELLS WITHIN THE BAND WILL CONTINUE TO POSE A THREAT OF TORNADOES. TORNADO POTENTIAL TO THE SOUTHWEST OF THE CENTER OF IVAN.... INCLUDING MOBILE, AL...APPEARS TO BE LESSENING AS THE CYCLONE MOVES AWAY. SOME OF THESE AREAS WILL BE CLEARED FROM TORNADO WATCH 826 SHORTLY. ..CARBIN.. 09/16/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...TBW...JAX...FFC...TAE...BMX...MOB... 29498263 30218819 33408825 32688370 31988369 31878263
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 8:09 PM CDT | Mesoscale Discussion | SPC | Baldwin, Barbour, Bullock, Butler, Clarke, Coffee and 17 more | 2 hr |
| Sep 15, 10:35 PM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Chambers, Chilton and 20 more | 115 min |
| Sep 16, 1:10 AM CDT | Tornado Watch | SPC | Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 34 more | 9 hr |
| Sep 16, 2:57 AM CDT | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 33 more | 2 hr |
| Sep 16, 9:09 AM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bullock, Butler, Calhoun, Chambers and 25 more | 66 min |
| Sep 16, 9:45 AM CDT | Tornado Watch | SPC | Autauga, Barbour, Bullock, Calhoun, Chambers, Cherokee and 17 more | 10 hr |
| Sep 16, 9:50 AM CDT | Tornado Watch | SPC | Coffee, Dale, Geneva, Henry, Houston, Pike | 10 hr |
| Sep 16, 1:16 PM CDT | Mesoscale Discussion | SPC | Barbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 15 more | 119 min |
| Sep 16, 5:38 PM CDT | Mesoscale Discussion | SPC | Calhoun, Chambers, Cherokee, Clay, Cleburne, DeKalb and 6 more | 2 hr |
| Sep 16, 5:00 AM CDT | Tornado Watch | SPC | Columbia, Dixie, Gilchrist, Hamilton, Lafayette, Madison and 2 more | 5 hr |
| Sep 16, 9:58 AM CDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Columbia and 16 more | 2 hr |
| Sep 16, 11:20 AM CDT | Tornado Watch | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Columbia and 19 more | 9 hr |
| Sep 16, 2:31 PM CDT | Mesoscale Discussion | SPC | Bulloch, Burke, Candler, Columbia, Effingham, Emanuel and 11 more | 119 min |
Nearby
Mesoscale Discussions in Georgia, 2004Mesoscale Discussions in Alabama, 2004Mesoscale Discussions in Florida, 2004Every mesoscale discussion in 2004
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.