Alert archive / Alabama / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 59, NWS Mobile, AL

August 12, 1987Baldwin County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Aug 12, 1987, 7:45 AM CDT for Baldwin County, Alabama. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Aug 12, 1987, 7:45 AM CDT (12:45 UTC)
Expired
Aug 12, 1987, 8:45 AM CDT
In force
60 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Baldwin 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

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 0.8 hours before the alert went out and 121 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, Eglin AFB/Valpar, FL at 12:00Z on 1987-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 834 joules per kilogram.LCLEL10008507005003002001001 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, Eglin AFB/Valpar, FL at 12:00Z on 1987-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 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
834 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
598 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
-5 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 121245
SVRMOB
ALC003-121345-

BULLETIN..IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
745 AM CDT WED AUG 12 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 845 AM CDT FOR THE FOLLOWING COUNTY IN ALABAMA...

...SOUTH BALDWIN

AT 745 AM RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTHEAST
OF FOLEY MOVING TO THE EAST AT 15 MPH.

DAMAGING WINDS HAVE BEEN REPORTED WITH THIS THUNDERSTORM ON THE
FORT MORGAN PENINSULA.

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, Aug 12, 6:34 AM CDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
630 AM CDT WED AUG 12 1987

...NUMEROUS SHOWERS AND THUNDERSTORMS IN SOUTHWEST ALABAMA AND
SOUTHEAST MISSISSIPPI...

AT 625 AM RADAR SHOWED NUMEROUS SHOWERS AND THUNDERSTORMS OVER SOUTHWEST
ALABAMA AND SOUTHEAST MISSISSIPPI AND THE ADJACENT COASTAL WATERS. THE
THUNDERSTORMS EXTENDED WESTWARD INTO SOUTHEAST LOUISIANA. THEY WERE
MOVING TOWARD THE EAST AT 15 MPH.

RESIDENTS OF SOUTHWEST ALABAMA AND SOUTHEAST MISSISSIPPI CAN EXPECT
SOME STRONG GUSTY WINDS...DANGEROUS LIGHTNING AND PERIODS OF HEAVY
RAINFALL THIS MORNING. MOTORISTS SHOULD BE ALERT FOR STREET FLOODING
AND POOR VISIBILITY IN HEAVY RAINFALL.

MARINE INTRESTS IN THE COASTAL WATERS CAN EXPECT GUSTY WINDS AND
ROUGH SEAS NEAR THUNDERSTORMS.

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.