Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 474, NWS Birmingham, AL

August 29, 1997Lauderdale County, Limestone County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 29, 1997, 4:19 PM CDT for Lauderdale County, Limestone County, Alabama. It was in force for 56 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
Aug 29, 1997, 4:19 PM CDT (21:19 UTC)
Expired
Aug 29, 1997, 5:15 PM CDT
In force
56 min
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Lauderdale County, AL, Limestone County, AL

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.3 hours before the alert went out and 156 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, Nashville Metro, TN at 12:00Z on 1997-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 885 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, Nashville Metro, TN at 12:00Z on 1997-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
885 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
842 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHSV 292122 RRA
SVRHSV
ALC077-083-292215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
419 PM CDT FRI AUG 29 1997

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  515 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONSS...

IN NORTH ALABAMA

   ...LAUDERDALE COUNTY...LIMESTONE COUNTY

AT 416 PM CDT WEATHER SERVICE RADAR IN HUNTSVILLE INDICATED SEVERE
THUNDERSTORMS OVER LIMESTONE COUNTY NEAR THACH...AND MOVING INTO EASTERN
LAUDERDALE COUNTY NEAR LEXINGTON AND GREEN HILL.

MOVEMENT WAS SOUTHEAST AT 15 TO 20 MILES AN HOUR.
THE STORM MOVING INTO LAUDERDALE COUNTY HAS HAD A HISTORY OF LARGE HAIL
AND DAMAGING WINDS.

WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE0 INTO LOW WATER CROSSINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 4:19 AM CDTSevere Thunderstorm WarningBMXLauderdale, Limestone56 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.