Alert archive / Alabama / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 56, NWS Mobile, AL

July 11, 1993Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jul 11, 1993, 2:24 PM CDT for Mobile County, Alabama. It was in force for 51 min.

The area

The counties it named.

The facts

Issued
Jul 11, 1993, 2:24 PM CDT (19:24 UTC)
Expired
Jul 11, 1993, 3:15 PM CDT
In force
51 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Mobile County, AL

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.4 hours before the alert went out and 152 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, Slidell Radar S, LA at 12:00Z on 1993-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1767 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, Slidell Radar S, LA at 12:00Z on 1993-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 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
1767 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
773 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
-44 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 
WUUS1 KMOB 111925 RRA
SVRMOB
ALC097-112015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
224 PM CDT SUN JUL 11 1993
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  315 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST ALABAMA
 
   ...NORTHERN MOBILE COUNTY
 
AT 223 MOBILE RADAR INDICATED A SEVERE THUNDERSTORM 8 MILES NORTH OF
MOBILE REGIONAL AIRPORT...NEAR SEMMES. THE SEVERE STORM WAS DRIFTING
NORTHEAST.
 
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 11, 10:28 AM CDT, 3 hours 56 minutes before
ALZ013-015-016-MSZ014-013-ALZ501-LAZ501-111730-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
1027 AM CDT SUN JUL 11 1993

...THUNDERSTORMS CONTINUE TO DEVELOPE AND DISSIPATE ACROSS THE REGION...

AT 1025 AM CDT MOBILE WEATHER RADAR SHOWS A THUNDERSTORM WITH HEAVY RAIN
EAST OF THE AIRPORT NEAR I-65. OTHER SHOWERS AND THUNDERSTORMS...SOME
WITH HEAVY RAIN WERE SCATTERED ACROSS THE SOUTH HALF OF MOBILE AND
BALDWIN COUNTY AND IN THE ADJACENT COASTAL WATERS. THE THUNDERSTORMS
WERE DRIFTING NORTHEAST...HOWEVER THEY TEND TO DISSIPATE AND REFORM IN
DIFFERENT AREAS AFTER A BRIEF HEAVY RAIN.

THE SCATTERED TO NUMEROUS THUNDERSTORMS SHOULD BE WITH US FOR THE
REMAINDER OF THE AFTERNOON. LIGHTNING IS GENERALLY THE MOST DANGEROUS
ELEMENT OF A SUMMERTIME STORM. WHEN A STORM THREATENS YOUR AREA MOVE
INSIDE OR IF AFLOAT STEER CLEAR OF DARK THREATENING CLOUDS. REMEMBER IT
DOES NOT HAVE TO BE RAINING TO HAVE LIGHTNING STRIKE YOUR LOCdATION.

STRONG GUSTY WINDS AND HEAVY RAIN ALONG WITH FREQUENT LIGHTNING CAN BE
EXPECTED WITH THE STRONGER STORMS FOR THE REST OF THE AFTERNOON ACROSS
THE AREA.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 3:00 PM CDTSevere Thunderstorm WarningMOBMobile45 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.