Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 183, NWS Jackson, MS

July 23, 1990Sumter County, Alabama

NWS Jackson, MS issued this severe thunderstorm warning at Jul 23, 1990, 1:10 PM CDT for Sumter County, Alabama. It was in force for 35 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
Jul 23, 1990, 1:10 PM CDT (18:10 UTC)
Expired
Jul 23, 1990, 1:45 PM CDT
In force
35 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Sumter 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
Jul 23, 1:30 PM CDTThunderstorm Wind 0Sumter, 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, 6.2 hours before the alert went out and 100 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 1990-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1365 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 1990-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
1365 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
824 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMEI 231811
SVRMEI
ALC119-231845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MERIDIAN MS
110 PM CDT MON JUL 23 1990
 
THE NATIONAL WEATHER SERVICE IN MERIDIAN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  145 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL ALABAMA
 
   ...SUMTER COUNTY
 
AT 110 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHWEST
OF LIVINGSTON ALABAMA MOVING EAST AT 35 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 THE LOWEST FLOOR
OF YOUR HOME OR BUSIN_ESS.  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

Special weather statement, Jul 23, 11:05 AM CDT, 2 hours 5 minutes before
MSZ003-008-231700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1105 AM CDT MON JUL 23 1990

...THUNDERSTORMS DEVELOPING IN EXTREME WESTCENTRAL MISSISSIPPI...

AT 1100 AM CDT...AN AREA OF THUNDERSTORMS WERE INDICATED ABY RADAR OVER
THE WESTCENTRAL COUNTIES.  THE STRONGEST THUNDERSTORM WAS LOCATED JUST
NORTHEAST OF VICKSBURG.   MOVEMENT WAS TO THE NORTHEAST AT 20 MILES AN
AN HOUR.

THESE STORMS ARE CAPABLE OF PRODUCING BRIEF HEAVY RAINFALL...FREQUENT
LIGHTNING...AND WIND GUSTS TO OVER 40 MILES AN HOUR.
Special weather statement, Jul 23, 1:08 PM CDT, 2 minutes before
MSZALL-231845-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
105 PM CDT MON JUL 23 1990

THUNDERSTORMS CONTINUE OVER CENTRAL MISSISSIPPI.

AT 100 PM CDT SCATTERED STRONG THUNDERSTORMS CONTINUED OVER CENTRAL
MISSISSIPPI. THE STRONGER STORMS WERE LOCATED OVER SHARKEY...HUMPHREYS
...LEAKE...SCOTT AND KEMPER COUNTIES.

THESE STORMS ARE CAPABLE OF PRODUCING WIND GUSTS OVER 40 MILES AN HOUR
...BRIEF HEAVY RAIN...FREQU[ENT LIGHTNING AND POSSIBLE HAIL AS THEY MOVE
TO THE NORTHEAST AT 25 MILES AN HOUR.

OTHER THUNDERSTORMS WERE SCATTERD ACROSS CENTRAL MISSISSIPPI...THE
MISSISSIPPI DELTA AND SOUTHWEST MISSISSIPPI.

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.