Alert archive / Alabama / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 1, NWS Mobile, AL

February 15, 1987Dallas County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Feb 15, 1987, 5:24 PM CST for Dallas County, Alabama. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Feb 15, 1987, 5:24 PM CST (23:24 UTC)
Expired
Feb 15, 1987, 6:30 PM CST
In force
66 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Dallas County, AL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 11.4 hours before the alert went out and 64 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 1987-02-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1987-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
713 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
52 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 
TTAAOO KMGM 152324
SVRMGM
ALC047-160030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
524 PM CST SUN FEB 15 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  630 PM CST FOR PEOPLE IN THE FOLLOWING COUNTIES:
 
IN SOUTH ALABAMA
          ..DALLAS

AT 5 25PM CST WEATHER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
FROM EASTERN PERRY COUNTY SOUTHWARD TO SOUTHERN DALLAS COUNTY MOVING
TOWARD THE EAST AT 40 MILES AN HOUR.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER,
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM GBUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

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, Feb 15, 1:30 PM CST, 3 hours 54 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
130 PM CST SUN FEB 15 1987

...TORNADO WATCH NUMBER 10 IS IN EFFECT UNTIL 600 PM FOR ALL COUNTIES
IN SOUTHEAST MISSISSIPPI...

AT 125 PM CST MOBILE RADAR SHOWED A BROAD AREA OF RAIN WITH SCATTERED
THUNDERSTORMS OVER SOUTHEAST MISSISSIPPI...EXTREME SOUTHWEST ALABAMA
AND THE ADJACENT COASTAL WATERS. A LINE OF STRONG THUNDERSTORMS FROM
JUST WEST OF HATTIESBURG EXTENDED INTO THE NEW ORLEANS AREA. THIS LINE
IS MOVING TO THE EAST AT NEAR 25 MPH...AS INDIVIDUAL STORMS MOVE TO THE
NORTHEAST RAPIDLY.

PERSONS IN SOUTHEAST MISSISSIPPI SHOULD BE ALERT FOR POSSIBLE SEVERE
WEATHER AND MOVE TO A SAFE PLACE IF THREATENING WEATH%ER IS SIGHTED.

BOATERS AND MARINE INTRESTS IN THE MISSISSIPPI AND ALABAMA COASTAL
WATERS SHOULD SEEK SAFE HARBOR UNTIL THUNDERSTORMS MOVE OUT OF THE
AREA.
Special weather statement, Feb 15, 1:36 PM CST, 3 hours 48 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
135 PM CST SUN FEB 15 1987

AT 130 PM CST...A LARGE AREA OF RAIN MIXED WITH SCATTERED THUNDER-
STORMS...SOME VERY HEAVY...WAS OVER SOUTHEAST LOUISIANA...SOUTHEAST
MISSISSIPPI...SOUTHWEST ALABAMA...AND THE ADJOINING COASTAL WATERS...
AND WAS MOVING INTO THE WEST PART OF THE FLORIDA PANHANDLE.
THE HEAVIER THUNDERSTORMS WERE AROUND THE MOBILE AREA AND IN COASTAL
MISSISSIPPI.
THE THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MILES AN HOUR.

THE HEAVIER THUNDERSTORMS WILL PRODUCE PERIODS OF VERY HEAVY RAIN...
FREQUENT LIGHTNING...GUSTY WINDS AROUND 40 MILES AN HOUR...FLOODING
OF STREETS AND POOR DRAINAGE AREAS...AND' FOR MARINE INTERESTS THE
ADDITIONAL ROUGH SEAS AND REDUCED VISIBILITY.
PERSONS SHOULD TAKE ANY NECESSARY PRECAUTIONS FOR THESE CONDITIONS.
Special weather statement, Feb 15, 3:35 PM CST, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
335 PM CST SUN FEB 15 1987

...A SPECIAL MARINE WARNING IS IN EFFECT FOR THE MISSISSIPPI-ALABAMA
COASTAL WATERS UNTIL 500 PM CST...

...TORNADO WATCH NUMBER 10 WAS CANCELED FOR SOUTHEAST MISSISSIPPI AT
AT 330 PM CST...

...TORNADO WATCH NUMBER 11 IS IN EFFECT FOR ALL COUNTIES IN SOUTHWEST
ALABAMA UNTIL 800 PM CST...

AT 330 PM CST MOBILE RADAR SHOWED A BROAD AREA OF RAIN WITH SCATTERED
THUNDERSTORMS OVER SOUTHWEST ALABAMA...THE WESTERN PART OF NORTHWEST
FLORIDA...EXTREME SOUTHEAST MISSISSIPPI AND THE ADJACENT COASTAL WATERS.
THE STRONGEST THUNDERSTORMS WERE LOCATED JUST WEST THROUGH NORTHWEST OF
MOBILE...MOVING RAPIDLY TO THE NORTHEAST.

IF THREATENING WEATHER APPROCHES...GO TO A SAFE PLACE IMMEDIATELY.
Special weather statement, Feb 15, 3:40 PM CST, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
335 PM CST SUN FEB 15 1987

AT 330 PM CST...A TORNADO WATCH WAS IN EFFECT FOR ESCAMBIA...SANTA
ROSA...OKALOOSA...WALTON...HOLMES...WASHINGTON...AND BAY COUNTIES IN
THE FLORIDA PANHANDLE UNTIL 8 PM CST.

NUMEROUS HEAVY THUNDERSTORMS WERE OVER EXTREME SOUTHEAST MISSISSIPPI...
SOUTHWEST ALABAMA...AND THE COASTAL WATERS SOUTH OF THERE DOWN TO THE
MOUTH OF THE MISSISSIPPI RIVER. ISOLATED THUNDERSTORMS WERE OCCURRING
OVER THE EXTREME WESTERN TIP OF THE FLORIDA PANHANDLE NEAR PENSACOLA
AND THE MILTON/CRESTVIEW AREAS. WIDESPREAD LIGHT RAIN ACCOMPANIED THE
STORMS AND WAS OVER SOUTHEAST MISSISSIPPI...SOUTHWEST ALABAMA...THE
WESTERN TIP OF THE FLORIDA PANHANDLE...AND THE COASTAL WATERS UP TO 100
MILES OFFSHORE.

MOVEMENT OF THE RAINS AND STORMS WAS TO THE EAST AND NORTHEAST AT 30
TO 35 MPH.
Special weather statement, Feb 15, 4:30 PM CST, 54 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
435 PM CST SUN FEB 15 1987

AT 430 PM CST...A TORNADO WATCH WAS IN EFFECT UNTIL 8PM FOR
ESCAMBIA...SANTA ROSA...OKALOOSA...WALTON...WASHINGTON...HOLMES...
AND BAY COUNTIES OF THE FLORIDA PANHANDLE.

SCATTERED VERY HEAVY THUNDERSTORMS WERE OVER SOUTHWEST AND COASTAL
ALABAMA AND OVER THE COASTAL WATERS OF ALABAMA AND THE EXTREME
WESTERN END OF THE FLORIDA PANHANDLE. WIDESPREAD LIGHT RAIN
ACCOMPANIED THE STORMS AND WAS SPREAD OVER MUCH OF SOUTH AND
SOUTHWEST ALABAMA AND THE EXTREME WESTERN END OF THE FLORIDA
PANHANDLE. THE RAIN EXTENDED INTO THE GULF TO 125 MILES SOUTH OF
THE COASTLINE.

MOVEMENT OF THE 1SYSTEM WAS TO THE EAST AND NORTHEAST AT 30 TO 35 MPH.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 15, 4:20 PM CSTFlash Flood WarningMOBMobile100 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1987Every severe thunderstorm warning in 1987

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.