Alert archive / Alabama / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 65, NWS Mobile, AL

July 23, 1993Lowndes County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 23, 1993, 5:33 PM CDT for Lowndes County, Alabama. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Jul 23, 1993, 5:33 PM CDT (22:33 UTC)
Expired
Jul 23, 1993, 6:30 PM CDT
In force
57 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Lowndes County, AL

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 10.6 hours before the alert went out and 98 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 1993-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1148 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 1993-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
1148 J/kg
Mixed-layer CIN
-95 J/kg
Mixed-layer LCL
1127 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
-11 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 232233 RRA
SVRMGM
ALC085-232330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
533 PM CDT FRI JUL 23 1993
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTH ALABAMA
 
   ...LOWNDES COUNTY
 
AT 530PM...WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM JUST
SOUTH OF BENTON...AND ANOTHER SEVERE THUNDERSTORM TO THE WEST OF
MONTGOMERY AND ENTERING LOWNDES COUNTY. BOTH THUNDERSTORMS WERE MOVING
TO THE SOUTHWEST AT 10 MPH.
 
 
 
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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 23, 4:45 PM CDT, 48 minutes before
FLZ001>004-ALZ010-013>018-MSZ012>014-232235-
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
435 PM CDT FRI JUL 23 1993

AT 430 PM CDT...THUNDERSTORMS SOME WITH VERY HEAVY RAIN AND GUSTY WINDS
...WERE OVER THE FLORIDA PANHANDLE...SOUTH ALABAMA...SOUTHEAST
MISSISSIPPI...AND THE ADJOINING COASTAL WATERS.
THE MAIN CONCENTRATION WAS OVER COASTAL AND INTERIOR SOUTHWEST ALABAMA
AND THE IMMEDIATE COASTAL WATERS...AND OVER THE WEST PART OF THE
FLORIDA PANHANDLE.
SOME OF THE STRONGER THUNDERSTORMS IN FLORIDA WERE AROUND THE CRESTVIEW
AREA...AND FROM AROUND BONIFAY TO MARIANNA.
SEVERAL STRONG THUNDERSTORMS WERE BETWEEN MONTGOMERY AND HATTIESBURG...
AND ALONG THE ALABAMA AND MISSISSIPPI BORDER.
THE THUNDERSTORMS WERE MOVING SOUTHWEST AT 10 MILES AN HOUR.

THE STRONGER THUNDERSTORMS ARE CAPABLE OF PRODUCING VERY HEAVY
DOWNPOURS CAUSING FLOODING OF POOR DRAINAGE AREAS...FREQUENT LIGHTNING
STRIKES...GUSTY WINDS AROXUND 40 MILES AN HOUR...AND POSSIBLE SMALL HAIL.
PERSONS SHOULD TAKE ANY NECESSARY PRECAUTIONS FOR THESE CONDITIONS AND
BE PREPARED TO TAKE PROTECTION IF THREATENING CONDITIONS ARE
SIGHTED OR APPEAR IMMINENT.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 4:40 PM CDTSevere Thunderstorm WarningMOBMontgomery65 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1993Every severe thunderstorm warning in 1993

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.