Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 152, NWS Jackson, MS

June 21, 1990Humphreys County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jun 21, 1990, 4:58 PM CDT for Humphreys County, Mississippi. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Jun 21, 1990, 4:58 PM CDT (21:58 UTC)
Expired
Jun 21, 1990, 6:00 PM CDT
In force
62 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Humphreys County, MS

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

Jackson, MS (KJAN), launched 12:00Z, 10.0 hours before the alert went out and 99 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, Jackson, MS at 12:00Z on 1990-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3038 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, Jackson, MS at 12:00Z on 1990-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
3038 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
936 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
6 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 KJAN 212200
SVRJAN
MSC053-212300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
458 PM CDT THU JUN 21 1990
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  600 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL MISSISSIPPI
 
   ...HUMPHREYS COUNTY
 
AT 455 PM...RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTHEAST OF
SILVER CITY MOVING NORTHWEST AROUND 10 MILES AN HOUR. THIS STORM
PROBABLY CONTAINS LARGE HAIL AND MAY PRODUCE A VERY STRONG WIND GUST.
THIS STORM WILL PROBABLY REACH SILVER CITY BEFORE 530 PM.
 
PEOPLE NEAR THE STORM SHOULD MOVE INSIDE A STRONG BUILDING AWAY
FROM WINDOWS.  DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNTIL
THE STORM HAS PASSED.  MOTORISTS DON'T DRIVE INTO WATER CROSSINGS.
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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, Jun 21, 2:15 PM CDT, 2 hours 43 minutes before
MSZALL-212100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
215 PM CDT THU JUN 21 1990

...STRONG THUNDERSTORMS DEVELOPING OVER MISSISSIPPI THIS AFTERNOON...

WIDESPREAD GULF MOISTURE AND HOT AFTERNOON TEMPERATURES HAVE RESULTED
IN A VERY UNSTABLE AIR MASS OVER THE STATE. SCATTERED THUNDERSTORMS
HAVE RAPIDLY DEVELOPED OVER NORTHERN AND CENTRAL SECTIONS OF
MISSISSIPPI...PRODUCING LIGHTNING AND HEAVY RAIN. A FEW STRONG STORMS
WERE REPORTED OVER NORTHWEST AND EAST CENTRAL MISSISSIPPI...ACCOMPANIED
BY HAIL AND LOCALLY STRONG WIND.

SCATTERED THUNDERSTORMS WILL CONTINUE OVER NORTH AND CENTRAL MISSISSIPPI
THIS AFTERNOON AND EVENING...WITH THUNDERSTORMS POSSIBLE SOUTH.

PLEASE STAY TUNED FOR PERIODIC WEATHER UPDATES AND POSSIBLE SEVERE
WEATHER WARNINGS.
Special weather statement, Jun 21, 2:45 PM CDT, 2 hours 13 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-212045-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
 230 PM CDT THU JUN 21 1990

 AT 230 PM CDT...JACKSON RADAR INDICATED SCATTERED THUNDERSTORMS WITH
VERY HEAVY RAIN OVER NORTH MISSISSIPPI NEAR CHARLESTON AND OVER EAST
CENTRAL MISSISSIPPI NEAR FOREST.
OTHER THUNDERSTORMS WERE SCATTERED OVER MAINLY THE NORTHERN HALF OF THE
STATE.

PERSONS IN NORTH AND EAST CENTRAL MISSISSIPPI SHOULD BE ON THE LOOKOUT FOR
VERY HEAVY RAIN ...DANGEROUS LIGHTNING...STRONG GUSTY WINDS AND SMALL HAIL.

MOVEMENT WAS EAST AT 5 MILES AN HOUR.

 F
Special weather statement, Jun 21, 3:13 PM CDT, 1 hour 45 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-212100-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
 300 PM CDT THU JUN 21 1990

 AT 300 PM...JACKSON RADAR INDICATED A BAND OF THUNDERSTORMS WITH VERY
HEAVY RAIN EXTENDING FROM WATER VALLEY TO LELAND.

THUNDERSTORMS WITH VERY HEAVY RAIN WERE ALSO LOCATED NEAR PELAHATCHIE AND
10 MILES WEST OF CARTHAGE.

OTHER THUNDERS^TORMS WERE SCATTERED OVER MAINLY THE NORTH HALF OF THE STATE.

VERY LITTLE MOVEMENT WAS INDICATED.
Special weather statement, Jun 21, 4:12 PM CDT, 46 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-212100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
405 PM CDT THU JUN 21 1990

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM FOR MUCH OF
NORTHERN AND CENTRAL MISSISSIPPI...

THE SEVERE THUNDERSTORM WARNING FOR MADISON COUNTY EXPIRED AT 400 PM.
NO REPORTS OF SEVERE WEATHER HAD BEEN RECEIVED DURING THE PAST HOUR.
HOWEVER...RADAR INDICATES A STRONG THUNDERSTORM REMAINS IN MADISON
COUNTY NEAR FLORA.  THIS STORM IS SHOWING LITTLE MOVEMENT BUT MAY BE
DRIFTING TO THE SOUTHWEST.

OTHER HEAVY THUNDERSTORMS WERE SCATTERED OVER THE NORTH HALF OF THE
STATE.  THE STRONGEST STORMS WERE INDICATED WEST OF BATESVILLE AND NEAR
LAKE PROVIDIENCE LOUISIANA.  THESE STORMS WERE SHOWING LITTLE MOVEMENT.

ISOLATED STORMS OF LESSER INTENSITY WERE SHOWN IN SOUTHEAST MISSISSIPPI.
Local storm report, Jun 21, 4:26 PM CDT, 32 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MERIDIAN MS
425 PM CDT WED JUN 21 1990

400 PM CDT  NOXUBEE COUNTY CIVIL DEFENSE REPORTS DIME SIZE HAIL
            SOUTHWEST OF SHUQUALAK NEAR THE NOXUBEE/KEMPER COUNTY
            LINE.
Special weather statement, Jun 21, 4:49 PM CDT, 9 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-212100-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
440 PM CDT THU JUN 21 1990

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM FOR MUCH OF
NORTHERN AND CENTRAL MISSISSIPPI...

A DELAYED REPORT WAS RECEIVED OF TREES DOWN AND GOLF BALL SIZE HAIL AT
345 PM AROUND FLORA IN WESTERN MADISON COUNTY.  THIS STORM HAS DRIFTED
TO THE WEST TO THE MADISON-YAZOO COUNTY LINE AND DECREASED SLIGHTLY IN
INTENSITY.  HOWEVER...IT MAY STILL PRODUCE HAIL AND STRONG WIND GUSTS.

OTHER HEAVY THUNDERSTORMS WERE SCATTERED OVER THE NORTHERN HALF OF THE
STATE.  THE STRONGEST STORM WAS INDICATED BETWEEN LEXINGTON AND SILVER
CITY.  THE STORMS IS NORTH MISSISSIPPI WERE DRIFTING TO THE NORTHWEST.

ISOLATED STORMS OF LESSER INTENSITY WERE SHOWN IN SOUTHEAST MISSISSIPPI.

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 1:31 AM CDTSevere Thunderstorm WarningJANCarroll29 min
Jun 21, 3:15 PM CDTSevere Thunderstorm WarningJANMadison45 min
Jun 21, 3:44 PM CDTSevere Thunderstorm WarningJANKemper, Noxubee46 min
Jun 21, 6:59 PM CDTSevere Thunderstorm WarningJANWinston46 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 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.