Alert archive / Mississippi / Tornado Warnings in 1990

Tornado Warning 77, NWS Jackson, MS

December 22, 1990Forrest County, Mississippi

NWS Jackson, MS issued this tornado warning at Dec 22, 1990, 12:57 PM CST for Forrest County, Mississippi. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Dec 22, 1990, 12:57 PM CST (18:57 UTC)
Expired
Dec 22, 1990, 1:30 PM CST
In force
33 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Forrest 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.0 hours before the alert went out and 113 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, Slidell Radar S, LA at 12:00Z on 1990-12-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 575 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, Slidell Radar S, LA at 12:00Z on 1990-12-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 197 square meters per square second.19395878Sfc1 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
575 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
197 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.6
Supercell composite
5.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAN 221858
TORJAN
MSC035-221930-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1257 PM CST SAT DEC 22 1990
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  130 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST MISSISSIPPI
 
   ...NORTHERN FORREST COUNTY
 
AT 1255 PM CST...A POSSIBLE TORNADO WAS STILL BEING INDICATED BY RADAR
OVER CENTRAL LAMAR COUNTY 5 MILES SOUTH OF SUMRALL. ON ITS PRESENT
TRACK...THIS STORM WILL BE MOVING ACROSS NORTHERN FORREST COUNTY NEAR
THE HATTIESBURG AREA AROUND 105 PM. MOVEMENT WAS NORHTEAST AT 35
MILES AN HOUR.
 
 
 
THIS IS A DANGEROUS STORM.  MOVE QUICKLY TO UNDERGROUND SHELTER IF
AVAILABLE.  OTHERWISE...GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR.
AVOID WINDOWS.  LEAVE CARS AND MOBILE HOMES FOR A STURDY BUILDING.
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 21, 6:04 PM CSTSevere Thunderstorm WarningJANHinds, Yazoo56 min
Dec 21, 6:09 PM CSTTornado WarningJANGrenada, Montgomery51 min
Dec 21, 6:58 PM CSTTornado WarningJANCalhoun47 min
Dec 21, 7:05 PM CSTFlash Flood WarningJANLeflore3 hr
Dec 21, 7:30 PM CSTSevere Thunderstorm WarningJANMadison45 min
Dec 21, 7:58 PM CSTSevere Thunderstorm WarningJANAttala, Leake32 min
Dec 21, 8:36 PM CSTSevere Thunderstorm WarningJANWinston69 min
Dec 22, 12:58 AM CSTSevere Thunderstorm WarningJANWarren32 min
Dec 22, 2:49 AM CSTFlash Flood WarningJANWarren116 min
Dec 22, 4:33 AM CSTSevere Thunderstorm WarningJANNeshoba27 min
Dec 22, 5:02 AM CSTSevere Thunderstorm WarningJANWinston28 min
Dec 22, 10:05 AM CSTSevere Thunderstorm WarningJANSimpson25 min
Dec 22, 10:42 AM CSTTornado WarningJANSimpson, Smith48 min
Dec 22, 10:50 AM CSTSevere Thunderstorm WarningJANNewton55 min
Dec 22, 10:57 AM CSTSevere Thunderstorm WarningJANNewton63 min
Dec 22, 11:26 AM CSTSevere Thunderstorm WarningJANNeshoba64 min
Dec 22, 12:23 PM CSTTornado WarningJANMarion, Walthall37 min
Dec 22, 12:28 PM CSTSevere Thunderstorm WarningJANNewton62 min
Dec 22, 12:39 PM CSTTornado WarningJANLamar51 min
Dec 22, 1:13 PM CSTTornado WarningJANJones62 min
Dec 22, 1:25 PM CSTSevere Thunderstorm WarningJANLauderdale35 min
Dec 22, 1:28 PM CSTTornado WarningJANForrest17 min

Nearby

Tornado Warnings in Mississippi, 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; the sounding from the Mesonet's radiosonde archive.