Alert archive / Alabama / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 63, NWS Mobile, AL

May 6, 1991Baldwin County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 6, 1991, 5:42 AM CDT for Baldwin County, Alabama. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
May 6, 1991, 5:42 AM CDT (10:42 UTC)
Expired
May 6, 1991, 6:45 AM CDT
In force
63 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Baldwin County, AL

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.7 hours before the alert went out and 192 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 00:00Z on 1991-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1927 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 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 00:00Z on 1991-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
1927 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
884 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
55 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 KMOB 061043
SVRMOB
ALC003-061145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
542 AM CDT MON MAY 6 1991
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  645 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ALABAMA
 
   ...BALDWIN COUNTY
 
AT 540 AM THE MOBILE RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
CROSSING MOBILE BAY INTO BALDWIN COUNTY. LARGE HAIL IS LIKELY WITH
THESE THUNDERSTORMS.
 
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, May 6, 2:24 AM CDT, 3 hours 18 minutes before
ALZ013-015-MSZ014-060830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
223 AM CDT MON MAY 6 1991

...A SEVERE THUNDERTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF
SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA...

COUNTIES INCLUDED IN THE WATCH IN SOUTHEAST MISSISSIPPI ARE...PERRY
AND GREENE.  IN SOUTHWEST ALABAMA THE FOLLOWING COUNTIES ARE INCLUDED:
WASHINGTON...CLARKE...MONROE...CONECUH AND ESCAMBIA.

AT 220 AM THE MOBILE RADAR INDICATED A LINE OF STRONG THUNDERSTORMS
FROM EAST OF LAUREL MISSISSIPPI TO WEST OF NEW ORLEANS.  THE LINE WAS
MOVING TOWARD THE EAST NORTHEAST AT 25 MPH.

RESIDENTS IN THE WATCH AREA SHOULD REMAIN ALERT FOR THE POSSIBILITY OF
SEVERE WEATHER.  STRONG DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE FOR
THE NEXT SEVERAL HOURS.
Special weather statement, May 6, 3:27 AM CDT, 2 hours 15 minutes before
ALZ013-016-MSZ013-060930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
325 AM CDT MON MAY 6 1991

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF
SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA...

THE MOBILE RADAR AT 320 AM INDICATED THAT THE LINE OF THUNDERSTORMS
ACROSS SOUTHEAST MISSISSIPPI TO NEAR NEW ORLEANS HAD WEAKENED.
HOWEVER...NEW THUNDERSTORMS WERE DEVELOPING TO THE EAST OF THE LINE
OVER JACKSON AND GEORGE COUNTIES OF MISSISSIPPI AND
WASHINGTON...MOBILE AND BALDWIN COUNTIES IN ALABAMA.

FOR THE NEXT TWO HOURS THESE COUNTIES CAN EXPECT STRONG GUSTY WINDS...
DANGEROUS LIGHTNING...HEAVY DOWNPOURS...AND POSSIBLY SOME HAIL AS THE
THUNDERSTORMS CONTINUES AND MOVE EAST AT 30 MPH.
Special weather statement, May 6, 4:34 AM CDT, 1 hour 8 minutes before
FLZ001-002-003-004-MSZALL-LAZALL-ALZALL-061030-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
435 AM CDT MON MAY 6 1991

...STRONG THUNDERSTORMS WERE MOVING INTO THE WEST PART OF THE FLORIDA
PANHANDLE...

STRONG THUNDERSTORMS WERE OVER THE WEST PART OF THE FLORIDA PANHANDLE
...SOUTHWEST ALABAMA...AND THE ADJOINING COASTAL WATERS.
THE STRONGER THUNDERSTORMS WERE MOVING INTO THE COASTAL AREAS OF
ESCAMBIA COUNTY...AROUND THE PENSACOLA NAVAL AIR STATION AND WEST OF
PENSACOLA...AND IN ALABAMA BETWEEN BAYOU LA BATRE AND MOBILE...AND
AROUND AND EAST OF CITRONELLE.
THE THUNDESTORMS WERE MOVING EAST-NORTHEAST 30 MILES AN HOUR.

THE THUNDERSTORMS ARE CAPABLE OF PRODUCING PERIODS OF HEAVY DOWNPOURS
...FREQUENT LIGHTNING...GUSTY WINDS AROUND 40 MILES AN HOUR...AND
POSSIBLE SMALL HAIL.
PERSONS SHOULD TAKE ANY NECESSARY PRECAUTIONS FOR THESE CONDITIONS.
Special weather statement, May 6, 4:47 AM CDT, 55 minutes before
FLZ001>004-061030-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PENSACOLA FL
445 AM CDT MON MAY 6 1991

...STRONG THUNDERSTORMS MOVING INTO THE WEST PART OF THE FLORIDA
PANHANDLE...

STRONG THUNDERSTORMS WERE OVER SOUTHWEST ALABAMA AND MOVING INTO
THE COASTAL AREA AND COASTAL WATERS OF ESCAMBIA COUNTY FLORIDA.
SOME OF THE STRONGER THUNDERSTORMS WERE MOVING INTO THE PENSACOLA
NAVAL AIR STATION AREA AND AROUND THE METROPOLITAN PENSACOLA AREA.
THE THUNDERSTORMS WERE MOVING EAST-NORTHEAST AT 30 MILES AN HOUR.

THE THUNDERSTORMS WILL BE MOVING INTO THE WEST PART OF THE FLORIDA
PANHANDLE DURING THE NEXT HOUR...AND ARE CAPABLE OF PRODUCING PERIODS
OF HEAVY DOWNPOURS...FREQUENT LIGHTNING...GUSTY WINDS AROUND 40 MILES
AN HOUR...AND POSSIBLE SMALL HAIL...AND FOR MARINE INTERESTS THE
ADDITIONAL ROUGH SEAS.
PERSONS SHOULD TAKE ANY NECESSARY PRECAUTIONS FOR THESE CONDITIONS
AS THE THUNDERSTORMS CONTINUE TO DEVELOP AND MOVE THROUGH THE AREA.
Local storm report, May 6, 5:37 AM CDT, 5 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
536 AM CDT MON MAY 6 1991

TIME             EVENT
525 AM CDT       FOLEY PD IN BALDWIN COUNTY REPORTED DIME TO QUARTER
                 SIZE HAIL 3 MILES WEST OF FOLEY.
Special weather statement, May 6, 5:39 AM CDT, 3 minutes before
FLZ001-002-003-004-MSZALL-LAZALL-ALZALL-061030-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
535 AM CDT MON MAY 6 1991

...STRONG THUNDERSTORMS WERE OVER THE WEST PART OF THE FLORIDA
PANHANDLE...

STRONG THUNDERSTORMS WERE OVER THE WEST PART OF THE FLORIDA PANHANDLE
...SOUTHWEST ALABAMA...AND THE ADJOINING COASTAL WATERS.
SOME OF THE STRONGER THUNDERSTORMS WERE FROM AROUND THE PENSACOLA AREA
TO MOBILE BAY...BETWEEN PENSACOLA AND MOLINO...FROM AROUND MOBILE TO
50 MILES NORTHEAST OF MOBILE.
THE THUNDESTORMS WERE MOVING EAST-NORTHEAST 30 MILES AN HOUR.

THE THUNDERSTORMS ARE CAPABLE OF PRODUCING PERIODS OF HEAVY DOWNPOURS
...FREQUENT LIGHTNING...GUSTY WINDS AROUND 45 MILES AN HOUR...AND
SMALL HAIL...AND FOR MARINE INTERESTS THE ADDITIONAL ROUGH SEAS.
PERSONS SHOULD TAKE ANY NECESSARY PRECAUTIONS FOR THESE CONDITIONS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 7:10 PM CDTSevere Thunderstorm WarningMOBMobile65 min
May 6, 4:38 AM CDTSevere Thunderstorm WarningMOBBaldwin52 min
May 6, 5:20 AM CDTSevere Thunderstorm WarningMOBConecuh, Escambia40 min
May 6, 6:47 AM CDTSevere Thunderstorm WarningMOBBaldwin58 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1991Every severe thunderstorm warning in 1991

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.