Alert archive / Alabama / Tornado Watches in 2004

Tornado Watch 891

November 23, 200419 counties in Alabama; 4 counties in Mississippi; 9 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Nov 23, 2004, 9:20 PM CST for 19 counties in Alabama; 4 counties in Mississippi; 9 counties in Tennessee. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Nov 23, 2004, 9:20 PM CST (03:20 UTC)
Expired
Nov 24, 2004, 4:00 AM CST
In force
7 hr
Issued by
the Storm Prediction Center
All 32 counties

Blount County, AL, Colbert County, AL, Cullman 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, Itawamba County, MS, Lowndes County, MS, Monroe County, MS, Tishomingo County, MS, Franklin County, TN, Giles County, TN, Grundy County, TN, Hardin County, TN, Lawrence County, TN, Lincoln County, TN, Marion County, TN, Moore County, TN, Wayne County, TN

The radar

The Columbus AFB radar (KGWX), 81 km from the middle of the area, began a volume at 03:22 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

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

IssuedProductOfficeCountiesLasted
Nov 23, 9:27 PM CSTSevere Thunderstorm WarningBMXLamar, Marion63 min
Nov 23, 9:48 PM CSTTornado WarningBMXLamar, Marion42 min
Nov 23, 10:05 PM CSTSevere Thunderstorm WarningHUNFranklin25 min
Nov 23, 10:16 PM CSTSevere Thunderstorm WarningBMXWinston59 min
Nov 23, 10:16 PM CSTSevere Thunderstorm WarningHUNColbert29 min
Nov 23, 10:38 PM CSTSevere Thunderstorm WarningHUNLawrence37 min
Nov 23, 11:30 PM CSTSevere Thunderstorm WarningMEGItawamba, Monroe30 min
Nov 24, 12:04 AM CSTFlash Flood WarningBMXMarion116 min
Nov 24, 12:12 AM CSTFlash Flood WarningHUNFranklin, Lawrence, Morgan6 hr
Nov 24, 12:29 AM CSTSevere Thunderstorm WarningHUNFranklin46 min
Nov 24, 12:43 AM CSTFlash Flood WarningBMXLamar2 hr
Nov 24, 12:48 AM CSTTornado WarningHUNFranklin27 min
Nov 24, 3:08 AM CSTFlash Flood WarningBMXLamar, Marion3 hr
Nov 24, 3:35 AM CSTFlash Flood WarningBMXJefferson, Tuscaloosa3 hr
Nov 24, 3:51 AM CSTFlash Flood WarningBMXCherokee, Etowah3 hr

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 00:00Z, 3.3 hours before the alert went out and 128 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 00:00Z on 2004-11-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 748 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 00:00Z on 2004-11-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
748 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
728 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
342 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 240321
SEL1  
SPC WW 240320
ALZ000-TNZ000-241000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 891
NWS STORM PREDICTION CENTER NORMAN OK
920 PM CST TUE NOV 23 2004

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

       NORTHERN ALABAMA
       MIDDLE TENNESSEE

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 920 PM
UNTIL 400 AM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST
OF A LINE FROM 55 MILES NORTH OF HUNTSVILLE ALABAMA TO 50 MILES
WEST SOUTHWEST OF BIRMINGHAM ALABAMA.

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 887...WW 888...WW 889...WW
890...

DISCUSSION...MESOSCALE CIRCULATION CENTER EMBEDDED WITHIN/PRECEDING
RAIN SHIELD OVER NRN MS EXPECTED TO CONTINUE ENE INTO NRN AL/MIDDLE
TN LATER TONIGHT. COMBINATION OF SLOWLY STRENGTHENING WIND FIELD
OVER REGION ...AND GRADUAL BOUNDARY LAYER AIR MASS RECOVERY...WILL
SUPPORT THREAT FOR A FEW EMBEDDED SUPERCELLS.  THESE MAY YIELD SHORT
LIVED TORNADOES AND/OR DAMAGING WIND GUSTS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24035.


...CORFIDI

352,0852 331,0861 331,0885 352,0880

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 23, 9:00 PM CSTMesoscale DiscussionSPCBlount, Colbert, Cullman, DeKalb, Etowah, Franklin and 10 more2 hr
Nov 23, 11:16 PM CSTMesoscale DiscussionSPCBibb, Blount, Chilton, Choctaw, Clarke, Cullman and 14 more119 min
Nov 24, 12:30 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Bibb, Chilton, Choctaw, Clarke and 12 more30 min
Nov 24, 12:45 AM CSTTornado WatchSPCBibb, Chilton, Choctaw, Clarke, Dallas, Greene and 7 more5 hr
Nov 24, 2:43 AM CSTMesoscale DiscussionSPCChoctaw, Clarke, Greene, Hale, Marengo, Pickens and 3 more62 min
Nov 24, 3:35 AM CSTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Clay, Cleburne, Cullman and 11 more25 min
Nov 24, 3:55 AM CSTTornado WatchSPCBlount, Calhoun, Cherokee, Cleburne, Cullman, Etowah and 5 more5 hr
Nov 24, 4:57 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Choctaw, Clarke, Conecuh and 13 more63 min
Nov 24, 5:20 AM CSTTornado WatchSPCAutauga, Baldwin, Bibb, Butler, Chambers, Chilton and 20 more6 hr
Nov 24, 7:11 AM CSTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Calhoun, Chambers and 24 more64 min
Nov 24, 7:25 AM CSTTornado WatchSPCBarbour, Chambers, Lee, Russell6 hr
Nov 24, 8:03 AM CSTMesoscale DiscussionSPCBarbour, Coffee, Covington, Dale, Geneva, Henry and 2 more57 min
Nov 24, 8:30 AM CSTTornado WatchSPCCoffee, Dale, Geneva, Henry, Houston6 hr
Nov 24, 9:23 AM CSTMesoscale DiscussionSPCBarbour, Chambers, Lee, Russell97 min
Nov 24, 11:24 AM CSTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston2 hr
Nov 23, 6:35 PM CSTTornado WatchSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 28 more7 hr
Nov 23, 7:53 PM CSTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Franklin, Hinds and 13 more37 min
Nov 23, 8:15 PM CSTTornado WatchSPCAdams, Amite, Claiborne, Copiah, Franklin, Hinds and 15 more6 hr
Nov 23, 9:14 PM CSTMesoscale DiscussionSPCAdams, Claiborne, Franklin, Hinds, Humphreys, Issaquena and 5 more2 hr
Nov 23, 10:01 PM CSTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Franklin, Issaquena and 4 more119 min
Nov 24, 1:28 AM CSTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Franklin, Hinds and 14 more32 min
Nov 24, 1:45 AM CSTTornado WatchSPCAdams, Amite, Attala, Claiborne, Copiah, Franklin and 15 more4 hr
Nov 24, 2:50 AM CSTTornado WatchSPCHancock, Harrison, Jackson3 hr
Nov 24, 5:35 AM CSTMesoscale DiscussionSPCHancock, Harrison, Jackson25 min
Nov 24, 5:55 AM CSTTornado WatchSPCHarrison, Jackson2 hr
Nov 24, 10:16 AM CSTMesoscale DiscussionSPCAlcorn, Benton, Lafayette, Marshall, Prentiss, Tippah and 1 more2 hr
Nov 24, 11:30 AM CSTTornado WatchSPCBedford, Benton, Carroll, Cheatham, Davidson, Decatur and 22 more6 hr
Nov 24, 12:55 PM CSTMesoscale DiscussionSPCBedford, Benton, Cheatham, Clay, Davidson, Decatur and 29 more95 min
Nov 24, 2:56 PM CSTMesoscale DiscussionSPCBedford, Benton, Cannon, Cheatham, Coffee, Davidson and 28 more2 hr

Nearby

Tornado Watches in Alabama, 2004Tornado Watches in Tennessee, 2004Tornado Watches in Mississippi, 2004Every tornado watch in 2004

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.