Alert archive / Alabama / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 26, NWS Mobile, AL

May 21, 1987Clarke County, Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at May 21, 1987, 7:37 PM CDT for Clarke County, Washington County, Alabama. It was in force for 53 min.

The area

The counties it named.

The facts

Issued
May 21, 1987, 7:37 PM CDT (00:37 UTC)
Expired
May 21, 1987, 8:30 PM CDT
In force
53 min
Issued by
NWS Mobile, AL
Area
Whole counties

Counties Clarke County, AL, Washington 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

Jackson, MS (KJAN), launched 00:00Z, 0.6 hours before the alert went out and 213 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, Jackson, MS at 00:00Z on 1987-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 276 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, Jackson, MS at 00:00Z on 1987-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
276 J/kg
Mixed-layer CIN
-170 J/kg
Mixed-layer LCL
1520 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-51 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 220042
SVRMOB
ALC025-129-220037-

BULLETIN..IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
737 PM CDT THU MAY 21 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 830 PM CDT FOR THE FOLLOWING COUNTIES IN ALABAMA...

...WASHINGTON AND CLARKE

AT 735 PM TWO SEVERE THUNDERSTORMS WERE INDICATED BY RADAR. ONE WAS
MILES EAST OF MILLRY IN WASHINGTON COUNTY AND THE OTHER WAS 7 MILES
EAST OF JACKSON IN CLARKE COUNTY. THE STORMS WERE MOVING TO THE WEST
AT 10 MILES AN HOUR AND MAY PRODUCE LARGE HAIL...60 MPH WINDS...
AND LARGE HAIL

PERSONS IN AND AROUND THE CITIES OF MILLRY AND JACKSON SHOULD
SEEK SHELTER AS THE STORM APPROA[CHES.

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.