Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 2003

August 2, 200838 counties in Alabama; 55 counties in Georgia; 27 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2008, 7:27 PM CDT for 38 counties in Alabama; 55 counties in Georgia; 27 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 2, 2008, 7:27 PM CDT (00:27 UTC)
Expired: Aug 2, 2008, 9:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 120 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay 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, Greene County, AL, Hale County, AL, Henry County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Wilcox County, AL, Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Butts County, GA, Calhoun County, GA, Carroll County, GA, Chattahoochee County, GA, Clay County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Fayette County, GA, Greene County, GA, Hancock County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Muscogee County, GA, Newton County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Terrell County, GA, Troup County, GA, Twiggs County, GA, Upson County, GA, Walton County, GA, Webster County, GA, Wilkes County, GA, Wilkinson County, GA, Attala County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Grenada County, MS, Jasper County, MS, Kemper County, MS, Lafayette County, MS, Lauderdale County, MS, Leake County, MS, Lee County, MS, Lowndes County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Scott County, MS, Union County, MS, Webster County, MS, Winston County, MS

The radar

The Birmingham radar (KBMX), 37 km from the middle of the area, began a volume at 00:29 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

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

Severe Thunderstorm Watch 798Aug 2, 7:55 PM CDT

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.5 hours before the alert went out and 37 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: 3360 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1483 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 107 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.

000 
ACUS11 KWNS 030027
SWOMCD
SPC MCD 030027 
GAZ000-ALZ000-MSZ000-030230-

MESOSCALE DISCUSSION 2003
NWS STORM PREDICTION CENTER NORMAN OK
0727 PM CDT SAT AUG 02 2008

AREAS AFFECTED...PORTIONS ERN/CENTRAL MS...CENTRAL/NRN
AL...CENTRAL/NRN GA.

CONCERNING...SEVERE THUNDERSTORM WATCH 795...

VALID 030027Z - 030230Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 795
CONTINUES.

ANOTHER WW MAY BE NEEDED OVER SOME AREAS S OF EXISTING WW
795...ESPECIALLY PORTIONS MS WHERE CONVECTION MAY REMAIN MORE DENSE
AND BETTER ORGANIZED.  MEANWHILE...WW 795 MAY BE CLEARED N OF
OUTFLOW BOUNDARY...GIVEN STG STATIC STABILITY TO ITS N.

COLLECTIVE COLD POOL HAS BECOME WELL-DEVELOPED ACROSS NRN PORTIONS
AL/GA -- AS PER MEASURED 62 KT GUST AT ATL AND VERY WELL DEFINED
OUTFLOW BOUNDARY MOVING SWD ACROSS NERN MS...CENTRAL AL AND
N-CENTRAL GA.  DEEP-LAYER MEAN FLOW WILL RETAIN STRONG COMPONENT
PERPENDICULAR TO THIS BOUNDARY...WHICH IS EXPECTED TO CONTINUE
SUPPORTING FORCED ASCENT AND STG-SVR TSTM DEVELOPMENT.  BMX RAOB AND
REGIONAL VWP INDICATE 30-40 KT 500 MB NLYS THAT WEAKEN WITH SWD
EXTENT...BUT WHICH STILL WILL SUPPORT CONTINUED GULFWARD PLUNGE OF
COLD POOL AND FORWARD PROPAGATIONAL DOMINANCE TO OVERALL MCS MOTION.
 BMX RAOB HAD MLCAPE 3500 J/KG...WHICH REPRESENTS STRONGEST BUOYANCY
SCENARIO FOR NEXT FEW HOURS.  HOWEVER...EVEN MODIFIED RAOBS AND RUC
SOUNDINGS INDICATE MLCAPES WILL REMAIN 2000-3000 J/KG DURING NEXT
2-3 HOURS ACROSS PRECONVECTIVE AIR MASS...SUPPORTED BY SFC DEW
POINTS COMMONLY 70S F AND TEMPS COOLING SLOWLY THROUGH 90S INTO
UPPER 80S F.

..EDWARDS.. 08/03/2008

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

ATTN...WFO...FFC...TAE...BMX...MOB...MEG...JAN...

34838919 33628795 33258730 33428660 33748613 33598587
33608556 33878526 33448466 33478435 33798390 33788274
32348287 31498428 31188679 31768894 32428983 33559001

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 2, 7:52 PM CDT	Severe Thunderstorm Watch	SPC	Choctaw, Clarke, Monroe, Washington, Wilcox	6 hr
Aug 2, 10:57 PM CDT	Mesoscale Discussion	SPC	Choctaw, Washington	93 min
Aug 2, 10:19 PM CDT	Mesoscale Discussion	SPC	Bulloch, Burke, Effingham, Jenkins, Screven	116 min
Aug 3, 10:50 AM CDT	Mesoscale Discussion	SPC	Adams, Attala, Choctaw, Claiborne, Copiah, Franklin and 12 more	55 min
Aug 3, 1:07 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Claiborne, Copiah, Franklin, Hinds, Issaquena and 9 more	7 hr
Aug 3, 3:09 PM CDT	Mesoscale Discussion	SPC	Bolivar, Carroll, Coahoma, Grenada, Holmes, Humphreys and 9 more	66 min
Aug 3, 4:21 PM CDT	Mesoscale Discussion	SPC	Adams, Amite, Attala, Carroll, Claiborne, Copiah and 22 more	54 min

Nearby

Mesoscale Discussions in Georgia, 2008 Mesoscale Discussions in Alabama, 2008 Mesoscale Discussions in Mississippi, 2008 Every mesoscale discussion in 2008

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; radar from the NEXRAD Level II archive.