Alert archive / Georgia / Severe Thunderstorm Watches in 2008

Severe Thunderstorm Watch 795

August 2, 200842 counties in Alabama; 58 counties in Georgia; 12 counties in South Carolina

The Storm Prediction Center issued this severe thunderstorm watch at Aug 2, 2008, 4:51 PM CDT for 42 counties in Alabama; 58 counties in Georgia; 12 counties in South Carolina. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Aug 2, 2008, 4:51 PM CDT (21:51 UTC)
Expired: Aug 2, 2008, 9:56 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 112 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Coosa County, AL, Cullman County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Lee County, AL, Limestone County, AL, Madison County, AL, Marengo County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Perry County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Elbert County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Greene County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Hart County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Lumpkin County, GA, Madison County, GA, Morgan County, GA, Murray County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Putnam County, GA, Rabun County, GA, Rockdale County, GA, Spalding County, GA, Stephens County, GA, Taliaferro County, GA, Towns County, GA, Union County, GA, Walker County, GA, Walton County, GA, White County, GA, Whitfield County, GA, Wilkes County, GA, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Birmingham radar (KBMX), 100 km from the middle of the area, began a volume at 21:53 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 10%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 80%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 90%
One or more hailstones of 2 inches or more: 20%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

54 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Aug 2, 4:53 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	37 min
Aug 2, 4:54 PM CDT	Severe Thunderstorm Warning	FFC	Barrow, Hall, Jackson	51 min
Aug 2, 5:02 PM CDT	Severe Thunderstorm Warning	FFC	Banks	43 min
Aug 2, 5:04 PM CDT	Severe Thunderstorm Warning	BMX	Blount	41 min
Aug 2, 5:09 PM CDT	Severe Thunderstorm Warning	FFC	Gilmer	25 min
Aug 2, 5:11 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale	34 min
Aug 2, 5:12 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Walker	48 min
Aug 2, 5:13 PM CDT	Severe Thunderstorm Warning	FFC	Fannin, Murray	47 min
Aug 2, 5:15 PM CDT	Severe Thunderstorm Warning	BMX	Blount	45 min
Aug 2, 5:15 PM CDT	Severe Thunderstorm Warning	GSP	Elbert, Hart	77 min
Aug 2, 5:17 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Walker	43 min
Aug 2, 5:21 PM CDT	Severe Thunderstorm Warning	GSP	Anderson, Greenville, Laurens, Spartanburg	84 min
Aug 2, 5:22 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	23 min
Aug 2, 5:34 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Etowah	41 min
Aug 2, 5:35 PM CDT	Severe Thunderstorm Warning	GSP	Cherokee	85 min
Aug 2, 5:38 PM CDT	Severe Thunderstorm Warning	FFC	Cobb	67 min
Aug 2, 5:42 PM CDT	Severe Thunderstorm Warning	FFC	Bartow	63 min
Aug 2, 5:45 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Jefferson, Tuscaloosa, Walker	45 min
Aug 2, 5:50 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Etowah	40 min
Aug 2, 5:56 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Walker	24 min
Aug 2, 5:56 PM CDT	Severe Thunderstorm Warning	FFC	Fulton	64 min
Aug 2, 6:02 PM CDT	Severe Thunderstorm Warning	FFC	DeKalb, Gwinnett	58 min
Aug 2, 6:08 PM CDT	Severe Thunderstorm Warning	FFC	Newton, Walton	52 min
Aug 2, 6:10 PM CDT	Severe Thunderstorm Warning	GSP	Spartanburg	65 min
Aug 2, 6:12 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale	33 min
Aug 2, 6:14 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	31 min
Aug 2, 6:19 PM CDT	Severe Thunderstorm Warning	FFC	Madison, Oglethorpe	41 min
Aug 2, 6:21 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Etowah, St. Clair	39 min
Aug 2, 6:25 PM CDT	Flash Flood Warning	HUN	Lauderdale	3 hr
Aug 2, 6:28 PM CDT	Severe Thunderstorm Warning	BMX	Pickens, Tuscaloosa	47 min
Aug 2, 6:29 PM CDT	Severe Thunderstorm Warning	FFC	Wilkes	46 min
Aug 2, 6:31 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	29 min
Aug 2, 6:31 PM CDT	Severe Thunderstorm Warning	GSP	Cherokee, Union	59 min
Aug 2, 6:32 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar	43 min
Aug 2, 6:36 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Hale, Tuscaloosa	39 min
Aug 2, 6:36 PM CDT	Severe Thunderstorm Warning	FFC	Clayton, Douglas, Fayette, Fulton, Henry, Rockdale	39 min
Aug 2, 6:54 PM CDT	Severe Thunderstorm Warning	GSP	Chester, York	81 min
Aug 2, 6:56 PM CDT	Severe Thunderstorm Warning	FFC	Carroll, Haralson	49 min
Aug 2, 7:03 PM CDT	Tornado Warning	BMX	Calhoun, St. Clair, Talladega	27 min
Aug 2, 7:03 PM CDT	Severe Thunderstorm Warning	FFC	Newton	29 min
Aug 2, 7:07 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair, Talladega	38 min
Aug 2, 7:08 PM CDT	Severe Thunderstorm Warning	FFC	Clayton, Coweta, Fayette, Henry, Spalding	52 min
Aug 2, 7:12 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Hale, Perry, Tuscaloosa	48 min
Aug 2, 7:15 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Pickens, Tuscaloosa	45 min
Aug 2, 7:18 PM CDT	Severe Thunderstorm Warning	FFC	Wilkes	42 min
Aug 2, 7:29 PM CDT	Severe Thunderstorm Warning	FFC	Greene, Oglethorpe, Taliaferro	31 min
Aug 2, 7:31 PM CDT	Tornado Warning	BMX	Pickens	15 min
Aug 2, 7:32 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair, Shelby, Talladega	43 min
Aug 2, 7:51 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Hale, Pickens, Sumter, Tuscaloosa	39 min
Aug 2, 7:54 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Coosa, Shelby, Talladega	30 min
Aug 2, 7:57 PM CDT	Severe Thunderstorm Warning	BMX	Pickens	33 min
Aug 2, 8:26 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter	34 min
Aug 2, 8:49 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Marengo, Sumter	41 min
Aug 2, 9:32 PM CDT	Severe Thunderstorm Warning	BMX	Sumter	28 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.9 hours before the alert went out and 100 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: 2433 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 664 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 2, 2:47 PM CDT	Mesoscale Discussion	SPC	Blount, Calhoun, Cherokee, Cleburne, Cullman, DeKalb and 8 more	118 min
Aug 2, 6:22 PM CDT	Severe Thunderstorm Watch	SPC	Bulloch, Burke, Columbia, Effingham, Jenkins, Lincoln and 3 more	6 hr
Aug 2, 1:30 PM CDT	Mesoscale Discussion	SPC	Cherokee, Chester, Chesterfield, Dillon, Lancaster, Marlboro and 1 more	90 min
Aug 2, 5:26 PM CDT	Mesoscale Discussion	SPC	Abbeville, Aiken, Anderson, Bamberg, Calhoun, Cherokee and 28 more	94 min

Nearby

Severe Thunderstorm Watches in Georgia, 2008 Severe Thunderstorm Watches in Alabama, 2008 Severe Thunderstorm Watches in South Carolina, 2008 Every severe thunderstorm watch 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.