Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 2525

November 18, 200329 counties in Alabama; 12 counties in Florida; 46 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Nov 18, 2003, 1:59 PM CST for 29 counties in Alabama; 12 counties in Florida; 46 counties in Georgia. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Nov 18, 2003, 1:59 PM CST (19:59 UTC)
Expired
Nov 18, 2003, 3:30 PM CST
In force
91 min
Issued by
the Storm Prediction Center
All 87 counties

Autauga County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Talladega County, AL, Tallapoosa County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Bartow County, GA, Calhoun County, GA, Carroll County, GA, Chattahoochee County, GA, Cherokee County, GA, Clay County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Decatur County, GA, DeKalb County, GA, Dougherty County, GA, Douglas County, GA, Early County, GA, Fayette County, GA, Floyd County, GA, Fulton County, GA, Gordon County, GA, Grady County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Marion County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Murray County, GA, Muscogee County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk 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, 8.0 hours before the alert went out and 107 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2003-11-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2003-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 266 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
22 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
560 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
266 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

430 
ACUS11 KWNS 182000
SWOMCD
SPC MCD 181959 
GAZ000-FLZ000-TNZ000-ALZ000-182130-

MESOSCALE DISCUSSION 2525
NWS STORM PREDICTION CENTER NORMAN OK
0159 PM CST TUE NOV 18 2003

AREAS AFFECTED...WRN GA / FL PANHANDLE...

CONCERNING...TORNADO WATCH 960...

VALID 181959Z - 182130Z

CONVECTIVE LINE CONTINUES MOVING EWD ACROSS NRN PORTIONS OF
WW...WHILE MORE SCATTERED STORMS CONTINUE TO DEVELOP / MOVE NWD
ACROSS THE FL PANHANDLE AND SERN AL.  SEVERE THREAT CONTINUES ACROSS
ERN HALF OF WW...AND NEW WW MAY BE REQUIRED EAST OF CURRENT WATCH
WITHIN THE NEXT 1 TO 2 HOURS.

ALTHOUGH INSTABILITY REMAINS LIMITED ACROSS MUCH OF THE
REGION...DEEP-LAYER WIND FIELD REMAINS QUITE STRONG -- SUPPORTIVE OF
A CONTINUED THREAT FOR DAMAGING WINDS AND ISOLATED TORNADOES.  

MOST UNSTABLE AIRMASS REMAINS WITHIN CURRENT WW...WITH WEAKER
INSTABILITY OVER THE FL PANHANDLE AND PARTICULARLY WRN GA. 
HOWEVER...GIVEN STRENGTH OF WIND FIELD...THREAT MAY EXTEND EWD INTO
GA AND THE CENTRAL AND ERN FL PANHANDLE WITHIN THE NEXT COUPLE OF
HOURS.

..GOSS.. 11/18/2003

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

ATTN...WFO...MRX...FFC...TAE...BMX...MOB...

35058472 34208418 30508419 29918526 30448764 33508623

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 18, 6:08 AM CSTMesoscale DiscussionSPCChoctaw, Colbert, Franklin, Lamar, Marion, Pickens and 1 more2 hr
Nov 18, 6:55 AM CSTTornado WatchSPCChoctaw, Colbert, Fayette, Franklin, Greene, Lamar and 9 more5 hr
Nov 18, 8:58 AM CSTMesoscale DiscussionSPCBaldwin, Butler, Coffee, Conecuh, Covington, Crenshaw and 4 more92 min
Nov 18, 10:30 AM CSTMesoscale DiscussionSPCBaldwin, Bibb, Blount, Butler, Chilton, Choctaw and 26 more90 min
Nov 18, 11:25 AM CSTTornado WatchSPCAutauga, Baldwin, Bibb, Blount, Butler, Calhoun and 38 more6 hr
Nov 18, 1:33 PM CSTMesoscale DiscussionSPCDeKalb, Jackson, Madison57 min
Nov 18, 1:55 PM CSTTornado WatchSPCDeKalb, Jackson5 hr
Nov 18, 4:31 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Butler, Chambers, Clay, Cleburne and 16 more29 min
Nov 18, 4:55 PM CSTTornado WatchSPCBarbour, Bullock, Chambers, Coffee, Covington, Crenshaw and 11 more5 hr
Nov 18, 3:26 PM CSTMesoscale DiscussionSPCFannin, Gilmer, Gordon, Murray, Whitfield94 min
Nov 18, 4:58 PM CSTMesoscale DiscussionSPCCatoosa, Chattooga, Dade, Fannin, Murray, Walker and 1 more32 min

Nearby

Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in Alabama, 2003Mesoscale Discussions in Florida, 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.