Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 193, NWS Birmingham, AL

March 29, 1997Walker County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 29, 1997, 12:20 AM CST for Walker 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
Mar 29, 1997, 12:20 AM CST (06:20 UTC)
Expired
Mar 29, 1997, 1:10 AM CST
In force
50 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Walker County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 6.3 hours before the alert went out and 84 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 1997-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1329 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 1997-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 141 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
1329 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1429 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
141 m²/s²
0-3 km storm-relative helicity
275 m²/s²
Significant tornado parameter
0.8
Supercell composite
8.0

Open this sounding in Storm Lab

The text

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

503 
WUUS1 KBHM 290620 RRA
SVRBHM
ALC127-290710-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1220 AM CST SAT MAR 29 1997

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM AL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 110 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL ALABAMA

   ...WALKER
 
AT 1218 AM CST...A SEVERE THUNDERSTORM WAS INDICATED BY WEATHER
RADAR 5 MILES NORTHWEST OF SIPSEY MOVING EAST AT 45 MPH.


 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 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 DONT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 28, 8:56 PM CSTSevere Thunderstorm WarningBMXLauderdale64 min
Mar 28, 10:32 PM CSTSevere Thunderstorm WarningBMXLawrence58 min
Mar 28, 10:47 PM CSTSevere Thunderstorm WarningBMXMorgan58 min
Mar 29, 12:13 AM CSTSevere Thunderstorm WarningBMXCullman32 min
Mar 29, 12:25 AM CSTSevere Thunderstorm WarningBMXBlount65 min
Mar 29, 12:39 AM CSTSevere Thunderstorm WarningBMXDeKalb66 min
Mar 29, 1:04 AM CSTSevere Thunderstorm WarningBMXSt. Clair31 min
Mar 29, 1:10 AM CSTSevere Thunderstorm WarningBMXEtowah65 min
Mar 29, 1:23 AM CSTSevere Thunderstorm WarningBMXCalhoun62 min
Mar 29, 1:30 AM CSTSevere Thunderstorm WarningBMXCherokee35 min
Mar 29, 2:00 AM CSTSevere Thunderstorm WarningBMXSt. Clair20 min
Mar 29, 2:45 AM CSTSevere Thunderstorm WarningBMXCalhoun30 min
Mar 29, 2:51 AM CSTSevere Thunderstorm WarningBMXCleburne64 min
Mar 29, 5:11 PM CSTSevere Thunderstorm WarningBMXRussell49 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.