Alert archive / Georgia / Mesoscale Discussions in 2003
Mesoscale Discussion 593
The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2003, 1:12 AM CDT for Houston County, Alabama; 30 counties in Florida; 31 counties in Georgia. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2003, 1:12 AM CDT (06:12 UTC)
- Expired
- Apr 26, 2003, 2:15 AM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 62 counties
Houston County, AL, Alachua County, FL, Baker County, FL, Bay County, FL, Bradford County, FL, Calhoun County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Franklin 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, Nassau County, FL, Okaloosa County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Lanier County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Pierce County, GA, Seminole County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Ware County, GA, Worth County, GA
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 6.2 hours before the alert went out and 44 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
- 396 J/kg
- Mixed-layer CIN
- -226 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
997 ACUS11 KWNS 260613 SWOMCD SPC MCD 260612 FLZ000-GAZ000-ALZ000-260715- MESOSCALE DISCUSSION 0593 NWS STORM PREDICTION CENTER NORMAN OK 0112 AM CDT SAT APR 26 2003 AREAS AFFECTED...NRN FL AND SRN GA CONCERNING...SEVERE THUNDERSTORM WATCH 173... VALID 260612Z - 260715Z ...EARLY MORNING SEVERE THREAT DIMINISHING RAPIDLY... LINE OF TSTMS FROM 25 WNW MGR-25 ENE MAI-25 SW MAI HAS BEEN WEAKENING OVER THE PAST COUPLE OF HOURS PER POST-ECLIPSE IR AND RADAR LOOP IMAGERY. AIR MASS DOWNSTREAM WAS OVERTURNED BY THE MCS THAT PASSED THROUGH EARLIER MONDAY EVENING. ONLY MODEST RECOVERY HAS TAKEN PLACE WITH MOST UNSTABLE CONDITIONS LOCATED ACROSS SRN FL. SO...DESPITE A FAVORABLE KINEMATIC PROFILE TO SUPPORT ORGANIZED SEVERE...LACK OF SUBSTANTIAL CAPE AND THE FACT THAT STORMS COULD BECOME MORE ELEVATED IN NATURE ATOP THE COLD DOME LEFT IN WAKE OF PREVIOUS MCS...IT APPEARS THE SEVERE THREAT IS DIMINISHING. THERE COULD BE SOME HAIL IN THE STRONGER UPDRAFTS...BUT PRIND THAT ANOTHER WW WILL NOT BE REQUIRED. ..RACY.. 04/26/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...TBW...JAX...FFC...TAE...MOB... 30098816 31648420 31888323 31178132 30608062 29948112 29508267 29458432 29438672 29508802 30018823
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 7:22 PM CDT | Mesoscale Discussion | SPC | Coffee, Covington, Dale, Geneva, Henry, Houston | 113 min |
| Apr 25, 7:51 PM CDT | Mesoscale Discussion | SPC | Russell | 54 min |
| Apr 25, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | Baldwin, Barbour, Butler, Coffee, Conecuh, Covington and 9 more | 5 hr |
| Apr 25, 11:24 PM CDT | Mesoscale Discussion | SPC | Dale, Geneva, Henry, Houston | 96 min |
| Apr 25, 10:52 PM CDT | Mesoscale Discussion | SPC | DeSoto, Glades, Hardee, Highlands, Hillsborough, Manatee and 4 more | 3 hr |
| Apr 26, 9:53 AM CDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 14 more | 2 hr |
Nearby
Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in Florida, 2003Mesoscale Discussions in Alabama, 2003Every mesoscale discussion in 2003
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.