Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 101, NWS Mobile, AL

April 28, 1990Macon County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 28, 1990, 12:49 PM CDT for Macon County, Alabama. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Apr 28, 1990, 12:49 PM CDT (17:49 UTC)
Expired
Apr 28, 1990, 1:45 PM CDT
In force
56 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Macon 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, 5.8 hours before the alert went out and 152 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 1990-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 75 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 1990-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.193958Sfc1 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
75 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
718 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMGM 281752
SVRMGM
ALC087-281845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
1249 PM CDT SAT APR 28 1990
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  145 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH ALABAMA
 
   ...MACON COUNTY
 
DOPPLER RADAR AT MONTGOMERY SHOWED INDICATIONS OF A SEVERE
THUNDERSTORM MOVING INTO MACON COUNTY FROM BULLOCK COUNTY NORTH OF
UNION SPRINGS. THIS THUNDERSTORM IS MOVING EASTNORTHEAST AT ABOUT 40
MILES AN HOUR.
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 11:44 AM CDTSevere Thunderstorm WarningMOBButler61 min
Apr 28, 12:15 PM CDTSevere Thunderstorm WarningMOBConecuh45 min
Apr 28, 12:29 PM CDTSevere Thunderstorm WarningMOBBullock46 min
Apr 28, 1:04 PM CDTSevere Thunderstorm WarningMOBPike41 min
Apr 28, 1:12 PM CDTSevere Thunderstorm WarningMOBBarbour, Bullock63 min
Apr 28, 1:23 PM CDTSevere Thunderstorm WarningMOBCovington67 min
Apr 28, 1:46 PM CDTSevere Thunderstorm WarningMOBEscambia44 min
Apr 28, 2:19 PM CDTSevere Thunderstorm WarningMOBCoffee56 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1990Every severe thunderstorm warning in 1990

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.