Alert archive / Georgia / Tornado Watches in 2005

Tornado Watch 756

August 29, 200523 counties in Alabama; 31 counties in Georgia

The Storm Prediction Center issued this tornado watch at Aug 29, 2005, 3:25 PM CDT for 23 counties in Alabama; 31 counties in Georgia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Aug 29, 2005, 3:25 PM CDT (20:25 UTC)
Expired
Aug 29, 2005, 6:35 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
All 54 counties

Blount County, AL, Calhoun County, AL, Cherokee County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, St. Clair County, AL, Walker County, AL, Winston County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Lumpkin County, GA, Murray County, GA, Newton County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Rockdale County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 66 km from the middle of the area, began a volume at 20:27 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Aug 29, 3:40 PM CDTTornado WarningFFCGwinnett, Rockdale35 min
Aug 29, 3:49 PM CDTTornado WarningFFCHaralson41 min
Aug 29, 4:13 PM CDTTornado WarningFFCForsyth, Gwinnett38 min
Aug 29, 4:30 PM CDTTornado WarningFFCPolk30 min
Aug 29, 4:30 PM CDTTornado WarningFFCPolk30 min
Aug 29, 4:36 PM CDTTornado WarningFFCFloyd39 min
Aug 29, 4:42 PM CDTTornado WarningFFCGordon18 min
Aug 29, 5:02 PM CDTTornado WarningFFCChattooga43 min
Aug 29, 5:15 PM CDTTornado WarningFFCFloyd45 min
Aug 29, 5:20 PM CDTTornado WarningFFCPickens40 min
Aug 29, 5:24 PM CDTTornado WarningFFCDawson36 min
Aug 29, 5:42 PM CDTTornado WarningFFCLumpkin33 min
Aug 29, 5:47 PM CDTTornado WarningFFCGilmer28 min
Aug 29, 5:48 PM CDTTornado WarningFFCChattooga27 min
Aug 29, 5:52 PM CDTTornado WarningFFCDeKalb, Rockdale38 min
Aug 29, 5:58 PM CDTFlash Flood WarningFFCFulton3 hr
Aug 29, 6:04 PM CDTTornado WarningFFCNewton26 min
Aug 29, 6:13 PM CDTFlash Flood WarningFFCDawson, Lumpkin6 hr
Aug 29, 6:15 PM CDTTornado WarningFFCFannin30 min
Aug 29, 6:19 PM CDTTornado WarningFFCGwinnett26 min
Aug 29, 6:24 PM CDTTornado WarningFFCWhite36 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, 8.4 hours before the alert went out and 140 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, Birmingham, AL at 12:00Z on 2005-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 606 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, Birmingham, AL at 12:00Z on 2005-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 square meters per square second.193958Sfc1 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
606 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
692 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.0

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 292026
SEL6  
SPC WW 292026
ALZ000-GAZ000-300500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 756
NWS STORM PREDICTION CENTER NORMAN OK
325 PM CDT MON AUG 29 2005

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       NORTHERN ALABAMA
       NORTHWEST GEORGIA

EFFECTIVE THIS MONDAY AFTERNOON FROM 325 PM UNTIL MIDNIGHT CDT.

TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS
LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST OF MUSCLE SHOALS
ALABAMA TO 55 MILES NORTHEAST OF ATLANTA GEORGIA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU6).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 755...

DISCUSSION...SUPERCELL TORNADO THREAT IS EXPECTED TO SHIFT NWD
THROUGH THIS EVENING AS THE REMNANTS OF HURRICANE KATRINA MOVE NWD
ACROSS CENTRAL/ERN MS. SURFACE ANALYSES REVEAL A FEED OF RELATIVELY
WARM/MOIST AIR FROM THE ESE FROM CENTRAL AL/GA TOWARD NRN
AL/GA...ALONG AND JUST N OF AN E-W SURFACE TROUGH.  VERTICAL SHEAR
WILL CONTINUE TO INCREASE NWD ACROSS AL/GA THROUGH THE
EVENING...SUPPORTING AN INCREASING TORNADO THREAT WITH DISCRETE
STORMS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 16050.


...THOMPSON

350,0881 345,0834 332,0834 333,0881

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 28, 10:16 PM CDTMesoscale DiscussionSPCBaldwin, Butler, Clarke, Conecuh, Covington, Escambia and 3 more119 min
Aug 29, 1:26 AM CDTMesoscale DiscussionSPCBaldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 8 more34 min
Aug 29, 2:00 AM CDTTornado WatchSPCBaldwin, Butler, Clarke, Conecuh, Covington, Crenshaw and 5 more8 hr
Aug 29, 6:33 AM CDTMesoscale DiscussionSPCBaldwin, Butler, Clarke, Conecuh, Covington, Escambia and 4 more117 min
Aug 29, 7:41 AM CDTMesoscale DiscussionSPCBarbour, Coffee, Dale, Geneva, Henry, Houston and 1 more94 min
Aug 29, 9:36 AM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 37 more84 min
Aug 29, 10:25 AM CDTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 38 more8 hr
Aug 29, 1:04 PM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 38 more86 min
Aug 29, 3:23 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 15 more37 min
Aug 29, 5:42 PM CDTMesoscale DiscussionSPCBibb, Chilton, Colbert, Cullman, Fayette, Franklin and 11 more3 hr
Aug 29, 6:12 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 49 more63 min
Aug 29, 6:40 PM CDTTornado WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 40 more10 hr

Nearby

Tornado Watches in Georgia, 2005Tornado Watches in Alabama, 2005Every tornado watch in 2005

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.