Alert archive / Alabama / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 71, NWS Mobile, AL

May 14, 1991Montgomery County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 14, 1991, 6:48 PM CDT for Montgomery County, Alabama. It was in force for 57 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 14, 1991, 6:48 PM CDT (23:48 UTC)
Expired
May 14, 1991, 7:45 PM CDT
In force
57 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Montgomery County, AL

What was reported inside it

TimeReportWhereRemark
May 14, 6:57 PM CDTThunderstorm Wind 0Montgomery, AL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 11.8 hours before the alert went out and 120 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 1991-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 806 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 1991-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 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
806 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
839 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-34 m²/s²
0-3 km storm-relative helicity
-9 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 142351
SVRMGM
ALC101-150045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
648 PM CDT TUE MAY 14 1991
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  745 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH ALABAMA
 
   ...MONTGOMERY COUNTY
 
AT 649 PM CDT RADAR SHOWED A CLUSTER OF SEVERE THUNDERSTORMS MOVING
INTO NORTHERN SECTIONS OF THE CITY OF MONTGOMERY. MOVEMENT WAS SOUTH
AT 20 MPH.
 
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 14, 2:16 PM CDT, 4 hours 32 minutes before
FLZ001-002-003-004-142100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PENSACOLA FL
200 PM CDT TUE MAY 14 1991

THE FIRST FIVE MONTHS OF 1991 HAVE BEEN THE WETTEST FOR THE
PENSACOLA AREA.  FROM JANUARY 1 THROUGH MAY 13 WE HAVE RECORDED
41.77 INCHES OF RAINFALL AT THE PENSACOLA REGIONAL AIRPORT.  THIS
IS 20.74 INCHES ABOVE NORMAL FOR THIS TIME PERIOD AND WE STILL
HAVE MORE THAN 2 WEEKS LEFT IN MAY.

THE PREVIOUS RECORDS FOR RAINFALL FOR THE PERIOD JANUARY THROUGH MAY
40.45 INCHES IN 1964
38.40 INCHES IN 1947
37.64 INCHES IN 1936
37.62 INCHES IN 1919

THIS YEARS EXCESSIVE TOTAL RAINFALL WAS TREMENDOUSLY BOOSTED BY
JANUARYS RECORD RAINFALL OF 18.77 INCHES.  FEBRUARY WAS BELOW NORMAL
AND MARCH, APRIL AND MAY WERE ABOVE NORMAL FOR RAINFALL.

DOES THIS MEAN WE CAN EXPECT ABOVE NORMAL RAINFALL FOR THE REST OF
THE YEAR?  OF THE JANUARY THROUGH MAY YEARS MENTIONED ABOVE, ONLY
1936 WAS BELOW NORMAL IN RAINFALL FOR THE REMAINDER OF THE YEAR.
(JUNE THROUGH DECEMBER)  THE OTHER THREE ENDED UP WETTER THAN NORMAL
AND IN 1947 THE TOTAL RAINFALL FOR THE YEAR WAS 90.32 INCHES WHICH IS
THE SECOND fHIGHEST YEARLY RAINFALL TOTAL.  THE GREATEST RAINFALL IN
A YEAR OCCURRED IN 1953 WHEN 90.41 INCHES OF RAINFALL FELL.

DOES THIS FORETELL AN ACTIVE HURRICANE SEASON FOR NORTHWEST FLORIDA?
ASK US IN NOVEMBER.
Special weather statement, May 14, 3:39 PM CDT, 3 hours 9 minutes before
FLZ001-002-003-004-142130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PENSACOLA FL
335 PM CDT TUE MAY 14 1991

WEATHER SERVICE RADAR SHOWS THUNDERSTORMS DEVELOPING ACROSS
NORTHWEST FLORIDA IN OKALOOSA, WALTON, HOLMES, WASHINGTON AND
BAY COUNTIES FROM NORTH OF CRESTVIEW TO WEST OF MARIANNA THEN
SOUTH TO NEAR NICEVILLE TO NORTH OF PANAMA CITY.

THE HEAVIEST THUNDERSTORMS WERE IN WALTON AND OKALOOSA COUNTIES
FROM NEAR DE FUNIAK SPRINGS TO SOUTHEAST OF CRESTVIEW.  LITTLE
MOVEMENT OF THE STORMS WAS NOTED.

SMALL HAIL...GUSTY WINDS...DANGEROUS LIGHTNING STRIKES AND BRIEF
PERIODS OF VERY HEAVY RAINFALL CAUSING TEMPORARY FLOODING OF LOW
LYING AREAS CAN BE EXPECTED FROM THESE STORMS FO(R THE NEXT COUPLE
OF HOURS.

MOST OF THE THUNDERSTORM ACTIVITY SHOULD END SHORTLY AFTER SUNSET.

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.