Alert archive / Alabama / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 21, NWS Birmingham, AL

April 14, 1987Madison County, Morgan County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 14, 1987, 7:50 PM CDT for Madison County, Morgan County, Alabama. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Apr 14, 1987, 7:50 PM CDT (00:50 UTC)
Expired
Apr 14, 1987, 8:50 PM CDT
In force
60 min
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Madison County, AL, Morgan 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

Nashville Metro, TN (KBNA), launched 00:00Z, 0.8 hours before the alert went out and 169 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, Nashville Metro, TN at 00:00Z on 1987-04-15Temperature 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, Nashville Metro, TN at 00:00Z on 1987-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -216 square meters per square second.1939587897117Sfc1 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
1139 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
-216 m²/s²
0-3 km storm-relative helicity
-235 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 KHSV 150045
SVRHSV
ALC089-103-150145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
750 PM CDT TUE APR 14 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 850 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTH ALABAMA
          ...MADISON...MORGAN
 
HUNTSVILLE RADAR AT 745 PM CDT SHOWED A SEVERE THUNDERSTORM IN MORGAN
COUNTY MOVING TO THE NORTHm NORTHEAST AT 45 MPH.
 
GOLF BALL SIZE HAIL WAS REPORTED WITH THIS STORM AS IT MOVED THROUHG
CULLMAN COUNTY.
 
SEVERE THUNDERSTORM WARNING REMAIN IN EFFECT UNTIL 8 PM CDT FOR
JACKSON AND DE KALB COUNTIES.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 14, 7:36 PM CDTSevere Thunderstorm WarningBMXMarshall54 min
Apr 14, 8:03 PM CDTSevere Thunderstorm WarningBMXEtowah27 min
Apr 14, 8:08 PM CDTSevere Thunderstorm WarningBMXDeKalb, Jackson52 min
Apr 14, 8:08 PM CDTSevere Thunderstorm WarningBMXMadison52 min
Apr 14, 9:05 PM CDTSevere Thunderstorm WarningBMXJackson55 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.