Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 457, NWS Birmingham, AL

July 28, 1997Bibb County, Chilton County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 28, 1997, 5:28 PM CDT for Bibb County, Chilton County, Alabama. It was in force for 47 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
Jul 28, 1997, 5:28 PM CDT (22:28 UTC)
Expired
Jul 28, 1997, 6:15 PM CDT
In force
47 min
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Bibb County, AL, Chilton County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.5 hours before the alert went out and 31 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 1997-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1583 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 1997-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939Sfc1 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
1583 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
879 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBHM 282230 RRA
SVRBHM
ALC007-021-282315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
528 PM CDT MON JUL 28 1997
 
THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  615 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL ALABAMA
 
   ...BIBB COUNTY...CHILTON COUNTY
 
AT 528 PM CDT...RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS OVER BIBB AND CHILTON COUNTIES...EXTENDING FROM JUST NORTH
OF CENTREVILLE TO EAST OF CLANTON.
 
THESE STORMS WERE MOVING TOWARD THE SOUTH AT 15 TO 20 MPH...AND WILL
AFFECT THE REMAINDER OF SOUTHERN BIBB AND CHILTON COUNTIES THROUGH 600
PM.
 
STRONG WINDS AND LARGE HAIL WILL LIKELY OCCUR WITH THESE STORMS.  IN
ADDITION...VERY HEAVY RAINFALL...IN EXCESS OF TWO AND A HALF
INCHES...WILL LIKELY ACCOMPANY THESE STORMS.
 
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
Jul 27, 9:26 PM CDTSevere Thunderstorm WarningBMXRussell59 min
Jul 27, 9:53 PM CDTSevere Thunderstorm WarningBMXBarbour47 min
Jul 28, 12:19 PM CDTSevere Thunderstorm WarningBMXMarengo31 min
Jul 28, 12:32 PM CDTSevere Thunderstorm WarningBMXCherokee48 min
Jul 28, 1:50 PM CDTSevere Thunderstorm WarningBMXJackson40 min
Jul 28, 2:10 PM CDTSevere Thunderstorm WarningBMXDeKalb, Jackson65 min
Jul 28, 2:33 PM CDTSevere Thunderstorm WarningBMXCalhoun57 min
Jul 28, 2:53 PM CDTSevere Thunderstorm WarningBMXMadison52 min
Jul 28, 3:18 PM CDTSevere Thunderstorm WarningBMXMorgan57 min
Jul 28, 3:40 PM CDTSevere Thunderstorm WarningBMXMarshall65 min
Jul 28, 3:54 PM CDTSevere Thunderstorm WarningBMXRandolph51 min
Jul 28, 3:58 PM CDTSevere Thunderstorm WarningBMXBlount, Cullman47 min
Jul 28, 4:11 PM CDTSevere Thunderstorm WarningBMXJefferson49 min
Jul 28, 4:15 PM CDTSevere Thunderstorm WarningBMXShelby60 min
Jul 28, 4:41 PM CDTSevere Thunderstorm WarningBMXTallapoosa64 min
Jul 28, 4:50 PM CDTSevere Thunderstorm WarningBMXBibb, Chilton40 min
Jul 28, 5:06 PM CDTSevere Thunderstorm WarningBMXCoosa54 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.