Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 417, NWS Birmingham, AL

July 9, 1997Jefferson County, Tuscaloosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 9, 1997, 3:30 PM CDT for Jefferson County, Tuscaloosa County, Alabama. It was in force for 45 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 9, 1997, 3:30 PM CDT (20:30 UTC)
Expired
Jul 9, 1997, 4:15 PM CDT
In force
45 min
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Jefferson County, AL, Tuscaloosa County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.5 hours before the alert went out and 48 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 1997-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 276 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 1997-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.193958Sfc1 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
276 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
962 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBHM 092038 COR
SVRBHM
ALC073-125-092115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
330 PM CDT WED JUL 9 1997

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN CENTRAL ALABAMA

   ...WESTERN JEFFERSON COUNTY

IN WEST CENTRAL ALABAMA

   ...EASTERN TUSCALOOSA COUNTY

WEATHER SERVICE RADAR CONTINUED TO SHOW THE DEVELOPMENT AND DECAY OF
POTENTIALLY SEVERE THUNDERSTORMS MOVING SLOWLY SOUTHWARD ALONG THE
JEFFERSON/TUSCALOOSA COUNTY LINE NEAR BANKHEAD LOCK AND DAM. THIS
THUNDERSTORM COMPLEX IS CAPABLE OF PRODUCING DAMAGING WIND AND LARGE
HAIL. MOVEMENT WAS SLOW TO THE SOUTHEAST.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...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
Jul 8, 7:09 PM CDTSevere Thunderstorm WarningBMXHale51 min
Jul 9, 2:44 PM CDTSevere Thunderstorm WarningBMXWalker46 min
Jul 9, 4:08 PM CDTSevere Thunderstorm WarningBMXWinston37 min
Jul 9, 4:16 PM CDTSevere Thunderstorm WarningBMXTuscaloosa44 min
Jul 9, 4:32 PM CDTSevere Thunderstorm WarningBMXWalker58 min
Jul 9, 5:25 PM CDTSevere Thunderstorm WarningBMXBibb50 min
Jul 9, 5:31 PM CDTSevere Thunderstorm WarningBMXFayette44 min
Jul 9, 6:07 PM CDTSevere Thunderstorm WarningBMXLamar, Marion48 min
Jul 9, 6:58 PM CDTSevere Thunderstorm WarningBMXTuscaloosa47 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.