Alert archive / Tennessee / Tornado Watches in 1997

Tornado Watch 57

February 21, 199722 counties in Alabama; 18 counties in Georgia; 46 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Feb 21, 1997, 7:00 AM CST for 22 counties in Alabama; 18 counties in Georgia; 46 counties in Tennessee. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Feb 21, 1997, 7:00 AM CST (13:00 UTC)
Expired
Feb 21, 1997, 12:00 PM CST
In force
5 hr
Issued by
the Storm Prediction Center
All 86 counties

Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Jefferson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Coweta County, GA, Dade County, GA, Douglas County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Haralson County, GA, Heard County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Walker County, GA, Whitfield County, GA, Anderson County, TN, Bedford County, TN, Bledsoe County, TN, Bradley County, TN, Campbell County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Jackson County, TN, Lincoln County, TN, Loudon County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Robertson County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Feb 21, 7:06 AM CSTSevere Thunderstorm WarningOHXCheatham, Davidson, Williamson69 min
Feb 21, 7:10 AM CSTSevere Thunderstorm WarningBMXLimestone50 min
Feb 21, 7:21 AM CSTSevere Thunderstorm WarningBMXMadison54 min
Feb 21, 7:24 AM CSTSevere Thunderstorm WarningBMXMorgan51 min
Feb 21, 7:33 AM CSTSevere Thunderstorm WarningOHXRutherford, Sumner, Wilson57 min
Feb 21, 7:53 AM CSTSevere Thunderstorm WarningBMXJackson67 min
Feb 21, 7:59 AM CSTSevere Thunderstorm WarningOHXFranklin46 min
Feb 21, 8:10 AM CSTSevere Thunderstorm WarningOHXCannon, DeKalb, Smith50 min
Feb 21, 8:17 AM CSTSevere Thunderstorm WarningOHXCoffee, Grundy43 min
Feb 21, 8:21 AM CSTSevere Thunderstorm WarningBMXTuscaloosa54 min
Feb 21, 8:27 AM CSTSevere Thunderstorm WarningOHXJackson48 min
Feb 21, 8:32 AM CSTSevere Thunderstorm WarningOHXWarren43 min
Feb 21, 8:38 AM CSTSevere Thunderstorm WarningMRXCumberland67 min
Feb 21, 8:46 AM CSTSevere Thunderstorm WarningOHXOverton, Pickett44 min
Feb 21, 8:54 AM CSTSevere Thunderstorm WarningOHXWhite51 min
Feb 21, 9:02 AM CSTSevere Thunderstorm WarningOHXPutnam43 min
Feb 21, 9:23 AM CSTSevere Thunderstorm WarningMRXFentress, Morgan67 min
Feb 21, 9:26 AM CSTSevere Thunderstorm WarningMRXRhea64 min
Feb 21, 9:29 AM CSTSevere Thunderstorm WarningBMXShelby46 min
Feb 21, 9:57 AM CSTSevere Thunderstorm WarningMRXScott63 min
Feb 21, 10:03 AM CSTSevere Thunderstorm WarningMRXAnderson, Campbell57 min
Feb 21, 10:11 AM CSTSevere Thunderstorm WarningMRXMeigs, Roane34 min
Feb 21, 10:31 AM CSTSevere Thunderstorm WarningBMXTalladega44 min
Feb 21, 10:50 AM CSTSevere Thunderstorm WarningMRXLoudon55 min

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 1.0 hours before the alert went out and 160 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 1997-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 116 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 1997-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 475 square meters per square second.1939587897117Sfc1 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
116 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
589 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
475 m²/s²
0-3 km storm-relative helicity
530 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

903 
WWUS9 KMKC 211233
SEL7  
MKC WW 211233
ALZ000-GAZ000-TNZ000-211800-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 57
STORM PREDICTION CENTER NORMAN OK
633 AM CST FRI FEB 21 1997

A...THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR

   PARTS OF NORTHERN AND EASTERN ALABAMA                          
   PARTS OF NORTHWEST GEORGIA                            
   PARTS OF MIDDLE AND EAST TENNESSEE                          

EFFECTIVE THIS FRIDAY MORNING UNTIL NOON CST.

TORNADOES...LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING
THUNDERSTORM WINDS ARE POSSIBLE IN THESE AREAS.


THE TORNADO WATCH AREA IS ALONG AND 85 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES SOUTHEAST OF BIRMINGHAM ALABAMA TO 50 MILES
NORTH NORTHWEST OF CROSSVILLE TENNESSEE.

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.

B..OTHER WATCH INFORMATION.. THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 56.  WATCH NUMBER 56 WILL NOT BE IN EFFECT AFTER 700
AM CST.
$$

C...TORNADOES AND A FEW SVR TSTMS WITH HAIL SFC AND ALF TO 1
INCHES.  EXTRM TURBC AND SFC WIND GUSTS TO 70 KNOTS.  A FEW CBS
WITH MAX TOPS TO 400.  MEAN WIND VECTOR 20045.

D...POTENTIAL FOR DMGG WNDS AND ISOLD TORNADOES LKLY TO CONT AS VRY
STG MIDLVL SPD MAX EJECTS NE ACRS RGN.  LOLVL VERT SHEAR WL CONT TO
BE ENHANCED BY SE FLOW NR THE SFC.    

E...OTR TSTMS... THIS WATCH REPLACES..WW 56.. CONT..WW 55..

...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 21, 4:45 AM CSTTornado WatchSPCBibb, Choctaw, Clarke, Greene, Hale, Marengo and 3 more6 hr
Feb 21, 4:45 AM CSTTornado WatchSPCColbert, Cullman, Fayette, Franklin, Jefferson, Lamar and 11 more6 hr
Feb 21, 9:15 AM CSTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 30 more5 hr
Feb 21, 12:00 PM CSTTornado WatchSPCBaldwin, Bibb, Bleckley, Butts, Carroll, Chattahoochee and 41 more6 hr
Feb 21, 2:00 PM CSTTornado WatchSPCBaldwin, Banks, Barrow, Bibb, Bleckley, Butts and 56 more5 hr
Feb 21, 4:00 PM CSTSevere Thunderstorm WatchSPCRichmond6 hr
Feb 20, 11:00 PM CSTTornado WatchSPCCrockett, Dyer, Fayette, Haywood, Lake, Lauderdale and 3 more6 hr
Feb 21, 10:15 AM CSTSevere Thunderstorm WatchSPCAnderson, Blount, Campbell, Claiborne, Cocke, Grainger and 13 more4 hr

Nearby

Tornado Watches in Tennessee, 1997Tornado Watches in Alabama, 1997Tornado Watches in Georgia, 1997Every tornado watch in 1997

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.