Alert archive / Alabama / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 80, NWS Birmingham, AL

July 30, 1986Marengo County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 30, 1986, 2:50 PM CDT for Marengo County, Alabama. It was in force for 70 min.

The area

The counties it named.

The facts

Issued
Jul 30, 1986, 2:50 PM CDT (19:50 UTC)
Expired
Jul 30, 1986, 4:00 PM CDT
In force
70 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

Centreville/Bibb, AL (KCKL), launched 12:00Z, 7.8 hours before the alert went out and 91 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 1986-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2229 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, Centreville/Bibb, AL at 12:00Z on 1986-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
2229 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1529 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 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 KBHM 301952
SVRBHM
ALC091-302100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
250 PM CDT WED JUL 30 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 400 PM CDT  FOR PEOPLE IN THE FOLLOWING COUNTIES IN

ALABAMA... MARENGO.


 AT 250 PM CDT RADAR INDICATED SEVERAL SEVERE THUNDERSTORMS LOCATED
IN MARENGO COUNTY MOVING SOUTHEAST AT 25 MPH. THESE THUNDERSTORnMS ARE
PRODUCING HEAVY RAIN..DAMAGING WINDS..DANGEROUS LIGHTNING..AND POSSIBLE
HAIL.

A SEVERE THUNDERSTORM IS DEFINED AS HAVING WINDS OF 58 MPH OR STRONGER
AND/OR HAIL 3/4 INCH IN DIAMETER OR GREATER.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 6:10 PM CDTSevere Thunderstorm WarningBMXGreene50 min
Jul 30, 6:50 PM CDTSevere Thunderstorm WarningBMXPickens40 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1986Every severe thunderstorm warning in 1986

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.