Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 82, NWS Jackson, MS

April 22, 1990Issaquena County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 22, 1990, 2:30 PM CDT for Issaquena County, Mississippi. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Apr 22, 1990, 2:30 PM CDT (19:30 UTC)
Expired
Apr 22, 1990, 3:00 PM CDT
In force
30 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Issaquena 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, 7.5 hours before the alert went out and 97 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 1990-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1566 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 1990-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
1566 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
655 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
17 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 KJAN 221931
SVRJAN
MSC055-222000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
230 PM CDT SUN APR 22 1990

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN WEST CENTRAL MISSISSIPPI

   ...ISSAQUENA COUNTY

AT 230 PM CDT...JACKSON RADAR WAS SHOWING A SEVERE THUNDERSTORM IN THE
VICNITY OF FITLER, MISSISSIPPI.  THIS THUNDERSTORM IS MOVING SOUTH-
SOUTHEAST AT 10 MPH AND WILL BE MOVING THROUGH SOUTHERN ISSAQUENA
COUNTY.

SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 55 MPH...LARGE
HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  MOVE TO AN
INTERIEOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
<

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, Apr 22, 11:39 AM CDT, 2 hours 51 minutes before
MSZ009-012-ALZ008-013-221800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MERIDIAN MS
1135 AM CDT SUN APR 22 1990

SEVERE THUNDERSTORM WATCH NUMBER 140 WHICH INCLUDES LAUDERDALE...
NEWTON...KEMPER...NESHOBA AND WINSTON COUNTIES IN EAST CENTRAL
MISSISSIPPI IN EFFECT UNTIL 4 PM CDT.

AT 1135 AM CDT MERIDIAN RADAR INDICATED SHOWERS AND THUNDERSTORMS
DEVELOPING RAPIDLY ALONG AND SOUTH OF A LINE FROM JACKSON TO
MERIDIAN MISSISSIPPI. COVERAGE AND INTENSITY INCREASED DURING THE
PAST HOUR. LITTLE MOVEMENT WAS INDICATED.

THUNDERSTORMS ARE EXPECTED TO CONTINUE TO INCREASE IN COVERAGE
AND INTENSITY AND PERSONS IN AND CLOSE TO THE WATCH AREA SHOULD
BE ALERT FOR THREATENING  WEATHER CONDITIONS AND LISTEN FOR LATER
STATEMENTS OR POSSIBLE WARNINGS. <<
Special weather statement, Apr 22, 11:41 AM CDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
1125 AM CDT SUN APR 22 1990

SEVERE THUNDERSTORM WATCH NUMBER 140 REMAINS IN EFFECT UNTIL
4:00 PM FOR PORTIONS OF CENTRAL AND WESTERN MISSISSIPPI.

AT 1125 AM...ONE ISOLATED THUNDERSTORM WITH HEAVY RAINFALL WAS
INDICATED IN THE DELTA 25 MILES SOUTHEAST OF GREENVILLE NEAR
SILVER CITY.

OTHERWISE...NUMEROUS THUNDERSTORMS AND SCATTERED LIGHT RAINSHOWERS
BEGAN DEVELOPING OVER EAST CENTRAL AND SOUTHEAST MISSISSIPPI DURING
THE PAST HOUR.

OTHER ISOLATED THUNDERSTORMS AND LIGHT RAINSHOWERS WERE OCCURRING
IN NORTHEAST LOUISIANA AND SOUTHEAST ARKANSAS.

MOVEMENT WAS SOUTHEAST AT 10 MILES AN HOUR OR LESS.
Special weather statement, Apr 22, 12:32 PM CDT, 1 hour 58 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
1225 PM CDT SUN APR 22 1990

SEVERE THUNDERSTORM WATCH NUMBER 140 REMAINS IN EFFECT UNTIL
4:00 PM FOR PORTIONS OF CENTRAL AND WESTERN MISSISSIPPI.

AT 1225 PM THUNDERSTORM ACTIVITY OVER CENTRAL AND SOUTHEAST MISSISSIPPI
HAD INCREASED RAPIDLY. HEAVIEST THUNDERSTORMS WERE OCCURRING 15 MILES
SOUTHEAST OF YAZOO CITY...15 MILE SOUTHEAST OF HOLLY BLUFF...NEAR
LAUREL AND RALEIGH...AND SOUTH OF FOREST. WHILE THESE THUNDERSTORMS HAVE
NOT REACHED SEVERE LIMITS...THEY ARE CAPABLE OF PRODUCING LOCALLY HEAVY
RAIN..STRONG GUSTY WINDS...SMALL HAIL..AND CLOUD TO GROUND LIGHTNING.
PERSONS IN THE PATH OF THESE THUNDERSTORMS SHOULD REMAIN ALERT FOR
RAPIDLY CHANGING CONDITIONS.

MOVEMENT WAS SOUTHEAST AT 15 MILES AN HOUR.
Special weather statement, Apr 22, 12:58 PM CDT, 1 hour 32 minutes before
MSZALL-221900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1257 PM CDT SUN APR 22 1990

...SEVERE THUNDERSTORM WATCH NUMBER 140 REMAINS IN EFFECT FOR PORTIONS
OF CENTRAL AND WEST MISSISSIPPI UNTIL 4 PM CDT...

AT 12:55 PM CDT...JACKSON RADAR WAS SHOWING AN AREA OF SCATTERED TO
NUMEROUS THUNDERSTORMS IN A 40 MILE WIDE BAND WHICH STRETCHED FROM
HOLLANDALE TO LEAKSVILLE.  THE STRONGEST THUNDERSTORMS IN THIS AREA
WERE LOCATED BETWEEN HOLLY BLUFF AND YAZOO CITY AND BETWEEN MAGEE AND
LAUREL.

ALL OF THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG GUSTY WINDS
ALONG WITH SMALL HAIL AND DANGEROUS LIGHTNING AS THEY MOVE SOUTHEAST
AT 15 MPH.
Special weather statement, Apr 22, 1:45 PM CDT, 45 minutes before
MSZALL-221945-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
145 PM CDT SUN APR 22 1990

...SEVERE THUNDERSTORM WATCH NUMBER 140 REMAINS IN EFFECT FOR PORTIONS
OF CENTRAL AND WEST MISSISSIPPI UNTIL 4 PM CDT... ...SEVERE
THUNDERSTORM WATCH NUMBER 141 REMAINS IN EFFECT FOR PORTIONS OF SOUTH
MISSISSIPPI UNTIL 8 PM CDT...

AT 1:30 PM CDT...JACKSON RADAR WAS CONTINUING TO SHOW AN AREA OF
SCATTERED TO NUMEROUS THUNDERSTORMS IN A 40 MILE WIDE BAND WHICH
STRETCHED FROM HOLLANDALE TO LEAKESVILLE.  THE STRONGEST THUNDERSTORMS
IN THIS AREA WERE BETWEEN HOLLY BLUFF AND FLORA AND BETWEEN MAGEE AND
RICHTON.  TO THE WEST OF THE STATE...A VERY STRONG THUNDERSTORM WAS
LOCATED NEAR OAK GROVE IN LOUISIANA.

ALL OF THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG GUSTY WINDS
ALONG WITH SMALL HAIL AND DANGEROUS LIGHTNING AS THEY MOVE SOUTHEAST
AT 10 MPH.

BOATERS ON BARNETT RESERVOIR SHOULD BE ALERT AS THE THUNDERSTORMS IN
THE VICINTY OF FLORA SOULD BE AFFECTING THE RESERVOIR WITHIN THE NEXT
HALF HOUR.
Special weather statement, Apr 22, 1:57 PM CDT, 33 minutes before
MSZALL-222045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
155 PM CDT SUN APR 22 1990

...SEVERE THUNDERSTORM WATCH NUMBER 140 REMAINS IN EFFECT FOR PORTIONS
OF CENTRAL AND WEST MISSISSIPPI UNTIL 4 PM CDT...
...SEVERE THUNDERSTORM WATCH NUMBER 141 REMAINS IN EFFECT FOR PORTIONS
OF SOUTH MISSISSIPPI UNTIL 8 PM CDT...

AT 1:50 PM CDT...JACKSON RADAR WAS CONTINUING TO SHOW AN AREA OF
SCATTERED TO NUMEROUS THUNDERSTORMS IN A 40 MILE WIDE BAND WHICH
STRETCHED FROM HOLLANDALE TO LEAKESVILLE.  THE STRONGEST THUNDERSTORMS
IN THIS AREA WERE BETWEEN HOLLY BLUFF AND FLORA AND BETWEEN MAGEE AND
RICHTON.  TO THE WEST OF THE STATE...A VERY STRONG THUNDERSTORM WAS
LOCATED NEAR LAKE PROVIDENCE IN LOUISIANA.

ALL OF THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG GUSTY WINDS
ALONG WITH SMALL HAIL AND DANGEROUS LIGHTNING AS THEY MOVE SOUTHEAST
AT 10 MPH.

BOATERS ON BARNETT RESERVOIR SHOULD BE ALERT AS THE THUNDERSTOR"MS IN
THE VICINTY OF FLORA SOULD BE AFFECTING THE RESERVOIR SHORTLY.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 12:50 PM CDTSevere Thunderstorm WarningJANJones55 min
Apr 22, 1:04 PM CDTSevere Thunderstorm WarningJANJasper116 min
Apr 22, 2:03 PM CDTSevere Thunderstorm WarningJANIssaquena27 min
Apr 22, 3:34 PM CDTSevere Thunderstorm WarningJANWarren26 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.