Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 74, NWS Mobile, AL

April 1, 1990Elmore County, Montgomery County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 1, 1990, 5:21 PM CDT for Elmore County, Montgomery County, Alabama. It was in force for 2 hr. 3 reports 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, 5:21 PM CDT (22:21 UTC)
Expired: Apr 1, 1990, 7:30 PM CDT
In force: 2 hr
Issued by: NWS Mobile, AL
Area: Whole counties

Counties Elmore County, AL, Montgomery 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

Time	Report	Where
Apr 1, 5:26 PM CDT	Thunderstorm Wind 0	Montgomery, AL
Apr 1, 5:30 PM CDT	Thunderstorm Wind 0	Elmore, AL
Apr 1, 5:42 PM CDT	Thunderstorm Wind 50	Montgomery, 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

Centreville/Bibb, AL (KCKL), launched 12:00Z, 10.4 hours before the alert went out and 110 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 667 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 840 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMGM 012222
SVRMGM
ALC051-101-020030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
521 PM CDT SUN APR 1 1990
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH ALABAMA
 
   ...ELMORE COUNTY...MONTGOMERY COUNTY
 
AT 520 PM CDT RADAR INDICATED SEVERE THUNDERSTORMS OVER SOUTHWEST
MONTGOMERY...LOWNDES AND AUTAUGA COUNTIES MOVING EAST SOUTHEAST
AT 30 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THrE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Apr 1, 4:43 PM CDT, 38 minutes before

ATTN SELS
STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
444 PM CDT SUN APR 1 1990

AT 442 PM THE GROVE HILL PD IN CLARKE COUNTY REPORTED TREES DOWN
IN THAT CITY.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 1, 4:10 PM CDT	Severe Thunderstorm Warning	MOB	Clarke	50 min
Apr 1, 4:18 PM CDT	Severe Thunderstorm Warning	MOB	Dallas, Wilcox	57 min
Apr 1, 4:21 PM CDT	Severe Thunderstorm Warning	MOB	Coosa, Tallapoosa	69 min
Apr 1, 4:54 PM CDT	Severe Thunderstorm Warning	MOB	Autauga, Lowndes	66 min
Apr 1, 4:54 PM CDT	Severe Thunderstorm Warning	MOB	Monroe	66 min
Apr 1, 5:31 PM CDT	Severe Thunderstorm Warning	MOB	Crenshaw	59 min
Apr 1, 5:32 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Escambia	43 min
Apr 1, 5:52 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Covington	68 min
Apr 1, 6:03 PM CDT	Severe Thunderstorm Warning	MOB	Bullock, Pike	57 min
Apr 1, 6:25 PM CDT	Severe Thunderstorm Warning	MOB	Coffee	65 min
Apr 1, 6:25 PM CDT	Severe Thunderstorm Warning	MOB	Macon	65 min
Apr 1, 6:41 PM CDT	Severe Thunderstorm Warning	MOB	Barbour, Dale	64 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1990 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.