Alert archive / Alabama / Tornado Warnings in 1990

Tornado Warning 7, NWS Mobile, AL

April 1, 1990Houston County, Alabama

NWS Mobile, AL issued this tornado warning at Apr 1, 1990, 7:24 PM CDT for Houston County, Alabama. It was in force for 66 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 1, 1990, 7:24 PM CDT (00:24 UTC)
Expired
Apr 1, 1990, 8:30 PM CDT
In force
66 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Houston County, AL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Apr 1, 8:15 PM CDTThunderstorm Wind 0Houston, AL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Apalachicola Mun, FL (KAQQ), launched 00:00Z, 0.4 hours before the alert went out and 161 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, Apalachicola Mun, FL at 00:00Z on 1990-04-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 205 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, Apalachicola Mun, FL at 00:00Z on 1990-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 square meters per square second.1939587897Sfc1 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
205 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
1079 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMGM 020024
TORMGM
ALC069-020130-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
724 PM CDT SUN APR 1 1990
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  830 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH ALABAMA
 
   ...HOUSTON COUNTY
 
AT 723 PM CDT RADAR INDICATED A POSSIBLE TORNADO JUST EAST
OF WICKSBURG MOVING EAST AT 30 MPH.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TOm COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 7:05 PM CDTSevere Thunderstorm WarningMOBHenry, Houston55 min
Apr 1, 7:05 PM CDTSevere Thunderstorm WarningMOBGeneva55 min

Nearby

Tornado Warnings in Alabama, 1990Every tornado warning in 1990Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.