Alert archive / Alabama / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 85, NWS Mobile, AL

September 20, 1993Conecuh County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Sep 20, 1993, 7:38 PM CDT for Conecuh County, Alabama. It was in force for 52 min.

The area

The counties it named.

The facts

Issued
Sep 20, 1993, 7:38 PM CDT (00:38 UTC)
Expired
Sep 20, 1993, 8:30 PM CDT
In force
52 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Conecuh County, AL

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 00:00Z, 0.6 hours before the alert went out and 165 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 00:00Z on 1993-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1658 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 00:00Z on 1993-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
1658 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
994 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 210038 RRA
SVRMOB
ALC035-210130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
738 PM CDT MON SEP 20 1993
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  830 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST ALABAMA
 
   ...CONECUH COUNTY
 
AT 735 PM A SEVERE THUNDERSTORM WAS INDICATED BY RADAR ABOUT 5 MILES
NORTH OF EVERGREEN MOVING TO THE EAST-SOUTHEAST AT 12 MPH.
 
THIS THUNDERSTORM WILL PASS VERY NEAR EVERGREEN BEFORE 800 PM.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, Sep 20, 7:18 PM CDT, 20 minutes before
ALZ015-210115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
719 PM CDT MON SEP 20 1993

...A FEW STRONG THUNDERSTORMS FOR PORTIONS OF SOUTHWEST ALABAMA...

THE MOBILE RADAR AT 715 PM SHOWED SEVERAL STRONG THUNDERSTORMS MOSTLY
ALONG THE MONROE-CONECUH COUNTY LINE EXTENDING DOWN INTO NORTHERN
ESCAMBIA COUNTY ALABAMA.  THE THUNDERSTORMS WERE MOVING TOWARD THE
EAST-SOUTHEAST AT 12 MPH.  THE STRONGEST STORM WAS LOCATED ABOUT 10
MILES NORTHWEST OF EVERGREEN.

FOR THE NEXT HOUR OR TWO PERSONS IN CONECUH COUNTY AND THE EASTERN
TWO-THIRDS OF ESCAMBIA COUNTY CAN EXPECT GUSTY WINDS...DANGEROUS
LIGHTNING...BRIEF TORRENTIAL RAINFALL AND POSSIBLY SOME HAIL AS THESE
THUNDERSTORMS MOVE THROUGH.

THE THUNDERSTORMS ARE LIKELY TO DECREASE IN INTENSITY BEFORE MIDNIGHT.

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.