Alert archive / Mississippi / Tornado Warnings in 1990

Tornado Warning 74, NWS Jackson, MS

December 22, 1990Simpson County, Smith County, Mississippi

NWS Jackson, MS issued this tornado warning at Dec 22, 1990, 10:42 AM CST for Simpson County, Smith County, Mississippi. It was in force for 48 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
Dec 22, 1990, 10:42 AM CST (16:42 UTC)
Expired
Dec 22, 1990, 11:30 AM CST
In force
48 min
Issued by
NWS Jackson, MS
Area
Whole counties

Counties Simpson County, MS, Smith County, MS

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
Dec 22, 10:45 AM CSTThunderstorm Wind 0Simpson, MS

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

Jackson, MS (KJAN), launched 12:00Z, 4.7 hours before the alert went out and 52 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 1990-12-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 822 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 1990-12-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 241 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
822 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
605 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
241 m²/s²
0-3 km storm-relative helicity
265 m²/s²
Significant tornado parameter
1.1
Supercell composite
5.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAN 221646 COR
TORJAN
MSC127-129-221730-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING                            ...CORRECTED...
NATIONAL WEATHER SERVICE JACKSON MS
1042 AM CST SAT DEC 22 1990

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1130 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN CENTRAL MISSISSIPPI

   ...EASTERN SIMPSON COUNTY...SMITH COUNTY

AT 1042 AM CST...A TORNADO WAS REPORTED OVER SIMPSON COUNTY NEAR
PINOLA. THIS STORM WILL MOVE NORTHEASTWARD BETWEEN MENDENHALL
AND MAGEE...AND THEN INTO SMITH COUNTY TOWARDS RALEIGH. MOVEMENT
WAS NORTHEAST AT 30 MILES AN HOUR.

IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS IN AN
INTERIOR RQOOM ON THE LOWEST FLOOR.  GET UNDER STURDY FURNITURE.
USE PILLOWS OR CUSHIONS TO COVER YOUR HEAD.
<

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, 10:50 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, 12:57 PM CSTTornado WarningJANForrest33 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.