Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 146, NWS Birmingham, AL

February 28, 1997Coosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Feb 28, 1997, 8:41 AM CST for Coosa County, Alabama. It was in force for 34 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 28, 1997, 8:41 AM CST (14:41 UTC)
Expired
Feb 28, 1997, 9:15 AM CST
In force
34 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Coosa County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 2.7 hours before the alert went out and 57 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 1997-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 133 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 1997-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 286 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
133 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
508 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
286 m²/s²
0-3 km storm-relative helicity
334 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBHM 281442 RRA
SVRBHM
ALC037-281515-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
841 AM CST FRI FEB 28 1997
 
THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  915 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL ALABAMA
 
   ...EASTERN COOSA COUNTY
 
THE SEVERE THUNDERSTORM WARNING FOR COOSA COUNTY HAS BEEN EXTENDED FOR
EASTERN COOSA COUNTY. THE SEVERE THUNDERSTORM IS NOW ALONG THE EASTERN
EDGE OF THE COUNTY ABOUT 6 MILES SOUTHWEST OF GOODWATER. THE STORM WAS
MOVING EAST AT 35 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.

IssuedProductOfficeCountiesLasted
Feb 28, 7:51 AM CSTSevere Thunderstorm WarningBMXCoosa, Talladega54 min
Feb 28, 8:14 AM CSTTornado WarningBMXClay46 min
Feb 28, 8:19 AM CSTFlash Flood WarningBMXBibb3 hr
Feb 28, 8:32 AM CSTSevere Thunderstorm WarningBMXTallapoosa43 min
Feb 28, 8:53 AM CSTTornado WarningBMXClay37 min
Feb 28, 9:09 AM CSTSevere Thunderstorm WarningBMXTallapoosa36 min
Feb 28, 9:13 AM CSTFlash Flood WarningBMXClay, Cleburne, Randolph3 hr
Feb 28, 9:13 AM CSTFlash Flood WarningBMXCalhoun, Cherokee, Etowah3 hr
Feb 28, 9:13 AM CSTSevere Thunderstorm WarningBMXRandolph47 min
Feb 28, 9:28 AM CSTSevere Thunderstorm WarningBMXChambers47 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1997Every 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.