Alert archive / Alabama / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 113, NWS Mobile, AL

September 1, 1989Autauga County, Dallas County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Sep 1, 1989, 2:24 PM CDT for Autauga County, Dallas County, Alabama. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Sep 1, 1989, 2:24 PM CDT (19:24 UTC)
Expired
Sep 1, 1989, 3:30 PM CDT
In force
66 min
Issued by
NWS Mobile, AL
Area
Whole counties

Counties Autauga County, AL, Dallas County, AL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 7.4 hours before the alert went out and 60 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, Centreville/Bibb, AL at 12:00Z on 1989-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2169 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, Centreville/Bibb, AL at 12:00Z on 1989-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
2169 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
774 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
63 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 KMGM 011925
SVRMGM
ALC001-047-012030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
224 PM CDT FRI SEP 1 1989
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  330 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH ALABAMA
          ...AUTAUGA...NORTHEASTERN DALLAS
 
AT 220 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM IN EXTREME
NORTHERN DALLAS COUNTY 15 MILES NORTH OF SELMA. MOVEMENT WAS EAST
SOUTHEAST AT AROUND 20 MPH AND WILL MOVE INTO WESTERN AUTAUGA COUNTY.
 
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 DRIVE INTO LOW WATER CROSSINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 3:35 PM CDTSevere Thunderstorm WarningMOBCoffee, Geneva55 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1989Every severe thunderstorm warning in 1989

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.