Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 485, NWS Birmingham, AL

October 25, 1997DeKalb County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Oct 25, 1997, 8:08 AM CDT for DeKalb County, Alabama. It was in force for 52 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
Oct 25, 1997, 8:08 AM CDT (13:08 UTC)
Expired
Oct 25, 1997, 9:00 AM CDT
In force
52 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County DeKalb County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 1.1 hours before the alert went out and 168 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 1997-10-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1546 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 1997-10-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 square meters per square second.1939587897Sfc1 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
1546 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
507 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.9
Supercell composite
4.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHSV 251309 RRA
SVRHSV
ALC049-251400-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
808 AM CDT SAT OCT 25 1997
 
THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH ALABAMA
 
   ...NORTHERN DEKALB COUNTY
 
AT 800 AM...RADAR INDICATED LARGE HAIL IN THE SEVERE THUNDERSTORM
CROSSING INTO DE KALB COUNTY NEAR HENAGAR. THE STORM WAS MOVING
TOWARDS THE EAST AT 35 MPH AND SHOULD MOVE OUT OF NORTHERN DE
KALB COUNTY BY 845 AM.
 
 
 
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAI^L...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 25, 10:18 AM CDTSevere Thunderstorm WarningBMXFranklin42 min
Oct 25, 10:18 AM CDTTornado WarningBMXMarion47 min
Oct 25, 10:59 AM CDTSevere Thunderstorm WarningBMXFranklin61 min
Oct 25, 11:00 AM CDTTornado WarningBMXMarion45 min
Oct 25, 11:10 AM CDTTornado WarningBMXWinston45 min
Oct 25, 11:45 AM CDTSevere Thunderstorm WarningBMXLawrence60 min
Oct 25, 11:48 AM CDTTornado WarningBMXWinston47 min
Oct 25, 12:20 PM CDTTornado WarningBMXCullman65 min
Oct 25, 12:22 PM CDTTornado WarningBMXLawrence, Limestone, Morgan68 min
Oct 25, 1:04 PM CDTTornado WarningBMXBlount51 min
Oct 25, 1:08 PM CDTSevere Thunderstorm WarningBMXMadison, Marshall67 min
Oct 25, 1:22 PM CDTTornado WarningBMXMontgomery48 min
Oct 25, 1:27 PM CDTTornado WarningBMXPike48 min
Oct 25, 2:13 PM CDTTornado WarningBMXBullock, Macon52 min
Oct 25, 2:27 PM CDTTornado WarningBMXPike48 min
Oct 25, 2:34 PM CDTTornado WarningBMXRussell46 min
Oct 25, 2:37 PM CDTSevere Thunderstorm WarningBMXRandolph48 min
Oct 25, 2:45 PM CDTTornado WarningBMXBarbour50 min
Oct 25, 4:36 PM CDTTornado WarningBMXFranklin69 min
Oct 25, 5:45 PM CDTTornado WarningBMXColbert, Franklin, Lawrence60 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.