Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 121, NWS Birmingham, AL

February 21, 1997Limestone County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Feb 21, 1997, 7:10 AM CST for Limestone County, Alabama. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 21, 1997, 7:10 AM CST (13:10 UTC)
Expired: Feb 21, 1997, 8:00 AM CST
In force: 50 min
Issued by: NWS Birmingham, AL
Area: Whole counties

County Limestone County, AL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 21, 4:45 AM CST	Tornado Watch	SPC	6 hr
Feb 21, 7:00 AM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 1.2 hours before the alert went out and 151 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: 133 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 392 m²/s²
0-3 km storm-relative helicity: 598 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHSV 211310 RRA
SVRHSV
ALC083-211400-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
710 AM CST FRI FEB 21 1997
 
THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH ALABAMA
 
   ...LIMESTONE COUNTY
 
AT 710 AM...RADAR SHOWED A POSSIBLE SEVERE THUNDERSTORM JUST NORTHWEST
OF TANNER AND IT SHOULD PASS EAST OF ATHENS BY 725 AM.
 
THIS STORM HAS PREVIOUSLY PRODUCED HIGH WINDS NEAR 60 MPH.
 
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
 
 
&

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 21, 5:08 AM CST	Tornado Warning	BMX	Lamar, Pickens	52 min
Feb 21, 5:51 AM CST	Tornado Warning	BMX	Marion	69 min
Feb 21, 5:57 AM CST	Severe Thunderstorm Warning	BMX	Pickens	48 min
Feb 21, 6:00 AM CST	Tornado Warning	BMX	Fayette, Lamar	60 min
Feb 21, 6:05 AM CST	Severe Thunderstorm Warning	BMX	Winston	55 min
Feb 21, 6:11 AM CST	Severe Thunderstorm Warning	BMX	Franklin	64 min
Feb 21, 6:15 AM CST	Severe Thunderstorm Warning	BMX	Tuscaloosa	60 min
Feb 21, 6:18 AM CST	Severe Thunderstorm Warning	BMX	Franklin	57 min
Feb 21, 6:28 AM CST	Severe Thunderstorm Warning	BMX	Walker	62 min
Feb 21, 6:32 AM CST	Severe Thunderstorm Warning	BMX	Colbert, Lauderdale, Lawrence	58 min
Feb 21, 6:45 AM CST	Tornado Warning	BMX	Lawrence	45 min
Feb 21, 6:56 AM CST	Severe Thunderstorm Warning	BMX	Cullman	64 min
Feb 21, 7:21 AM CST	Severe Thunderstorm Warning	BMX	Madison	54 min
Feb 21, 7:24 AM CST	Severe Thunderstorm Warning	BMX	Morgan	51 min
Feb 21, 7:53 AM CST	Severe Thunderstorm Warning	BMX	Jackson	67 min
Feb 21, 8:04 AM CST	Severe Thunderstorm Warning	BMX	Greene	56 min
Feb 21, 8:21 AM CST	Severe Thunderstorm Warning	BMX	Tuscaloosa	54 min
Feb 21, 8:47 AM CST	Severe Thunderstorm Warning	BMX	Dallas	43 min
Feb 21, 9:00 AM CST	Severe Thunderstorm Warning	BMX	Bibb	45 min
Feb 21, 9:22 AM CST	Severe Thunderstorm Warning	BMX	Autauga	38 min
Feb 21, 9:29 AM CST	Severe Thunderstorm Warning	BMX	Shelby	46 min
Feb 21, 9:38 AM CST	Severe Thunderstorm Warning	BMX	Lowndes	52 min
Feb 21, 9:57 AM CST	Severe Thunderstorm Warning	BMX	Autauga	33 min
Feb 21, 10:12 AM CST	Tornado Warning	BMX	Coosa, Elmore	48 min
Feb 21, 10:19 AM CST	Tornado Warning	BMX	Montgomery	41 min
Feb 21, 10:31 AM CST	Severe Thunderstorm Warning	BMX	Talladega	44 min
Feb 21, 10:36 AM CST	Severe Thunderstorm Warning	BMX	Lowndes	39 min
Feb 21, 10:45 AM CST	Severe Thunderstorm Warning	BMX	Tallapoosa	45 min
Feb 21, 10:57 AM CST	Tornado Warning	BMX	Montgomery	48 min
Feb 21, 11:01 AM CST	Tornado Warning	BMX	Elmore	29 min
Feb 21, 11:15 AM CST	Severe Thunderstorm Warning	BMX	Chambers, Lee	45 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1997 Every severe thunderstorm warning 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.