Alert archive / Alabama / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 48, NWS Birmingham, AL

July 6, 1987Marengo County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 6, 1987, 3:58 PM CDT for Marengo County, Alabama. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Jul 6, 1987, 3:58 PM CDT (20:58 UTC)
Expired
Jul 6, 1987, 4:30 PM CDT
In force
32 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Marengo 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, 9.0 hours before the alert went out and 232 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 1987-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1372 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, Eglin AFB/Valpar, FL at 12:00Z on 1987-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 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
1372 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
806 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
-4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 6, 1:10 PM CDT, 2 hours 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MONTGOMERY AL
110 PM CDT MON JUL 6 1987

HEAVY THUNDERSTORMS MOVING INTO COVINGTON COUNTY OF SOUTH ALABAMA...

AT 110PM CDT WEATHER RADAR SHOWED STRONG THUNDERSTORMS FROM 10 MILES
SOUTHWEST OF ANDALUSIA INTO NORTHWEST FLORIDA NORTH OF DESTIN. THE
THUNDERSTORMS WERE MOVING TOWARD THE NORTH AT 20 MPH.

THE HEAVIEST THUNDERSTORMS WERE JUST SOUTHWEST OF ANDALUSIA ABOUT
10 MILES. LOCALLY HEAVY RAIN...STRONG GUSTY SURFACE WINDS...INTENSE
LIGHTNING AND POSSIBLE HAIL MAY OCCUR NEAR THE HEAVIER STORMS.

PERSONS IN COVINGTON...GENEVA AND BUTLER COUNTIES OF SOUTH ALABAMA
SHOULD BE ON THE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
Local storm report, Jul 6, 2:53 PM CDT, 1 hour 5 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MONTGOMERY AL
250 PM CDT MON JUL 06 1987

COVINGTON COUNTY...
PEA TO MARBLE SIZE HAIL REPORTED SOUTHWEST OF ANDALUSIA.
REPORT FROM RADIO STATION WKYD IN ANDALUSIA. HAIL OCCURRED AROUND
135PM CDT.
PETTIT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 4:37 PM CDTSevere Thunderstorm WarningBMXDeKalb53 min
Jul 6, 5:47 PM CDTSevere Thunderstorm WarningBMXMarshall58 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.