Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 588

April 25, 20036 counties in Alabama; 5 counties in Florida; 21 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2003, 7:22 PM CDT for 6 counties in Alabama; 5 counties in Florida; 21 counties in Georgia. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Apr 25, 2003, 7:22 PM CDT (00:22 UTC)
Expired: Apr 25, 2003, 9:15 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 32 counties

Coffee County, AL, Covington County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Worth County, GA

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 173Apr 25, 9:00 PM CDT

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 0.4 hours before the alert went out and 102 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

824 
ACUS11 KWNS 260022
SWOMCD
SPC MCD 260022 
GAZ000-FLZ000-ALZ000-260215-

MESOSCALE DISCUSSION 0588
NWS STORM PREDICTION CENTER NORMAN OK
0722 PM CDT FRI APR 25 2003

AREAS AFFECTED...FL PANHANDLE / EXTREME SERN AL / SWRN GA

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 260022Z - 260215Z

SEVERE THREAT -- PRIMARILY IN THE FORM OF LARGE HAIL -- APPEARS TO
EXIST ACROSS THIS REGION SOUTH OF ONGOING TORNADO WATCHES.  SEVERE
THUNDERSTORM WATCH WILL LIKELY BE ISSUED SHORTLY.

LATEST SURFACE OBSERVATIONS SHOW TEMPERATURES MAINLY IN THE LOW 70S
ACROSS THE FL PANHANDLE EAST OF VPS AND NWD INTO ADJACENT AREAS OF
SERN AL / SWRN GA.  THIS COOLER / MORE STABLE/ LOW-LEVEL AIRMASS IS
A RESULT OF EARLIER CONVECTION WHICH HAS NOW MOVED SWD INTO CENTRAL
FL.  ABOVE THE MORE STABLE LOWER LEVELS...1000 TO 1500 J/KG ELEVATED
CAPE IS INDICATED...WHICH COMBINED WITH STRONG / UNIDIRECTIONAL
DEEP-LAYER WIND FIELD SUGGESTS THAT SEVERE THREAT SHOULD CONTINUE AS
STORMS MOVE EWD / SEWD INTO THIS REGION.  ALTHOUGH DEEP-LAYER SHEAR
IS SUFFICIENT FOR SUPERCELLS...MAIN SEVERE THREAT SHOULD BE LARGE
HAIL AS STORMS WILL LIKELY BE SUFFICIENTLY ELEVATED TO PRECLUDE A
SIGNIFICANT TORNADO / DAMAGING WIND THREAT. 

..GOSS.. 04/26/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...JAX...FFC...TAE...MOB...

31958358 31648313 30908322 30238586 30848655 31428641

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
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 26, 1:12 AM CDT	Mesoscale Discussion	SPC	Houston	63 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, 2003 Mesoscale Discussions in Alabama, 2003 Mesoscale Discussions in Florida, 2003 Every 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.