Alert archive / Mississippi / Tornado Warnings in 1990

Tornado Warning 38, NWS Jackson, MS

May 12, 1990Lamar County, Marion County, Mississippi

NWS Jackson, MS issued this tornado warning at May 12, 1990, 7:23 PM CDT for Lamar County, Marion County, Mississippi. It was in force for 37 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: May 12, 1990, 7:23 PM CDT (00:23 UTC)
Expired: May 12, 1990, 8:00 PM CDT
In force: 37 min
Issued by: NWS Jackson, MS
Area: Whole counties

Counties Lamar County, MS, Marion 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

Time	Report	Where	Remark
May 12, 7:30 PM CDT	Thunderstorm Wind 0	Marion, 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.4 hours before the alert went out and 108 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1087 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 729 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAN 130024
TORJAN
MSC091-073-130115-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
723 PM CDT SAT MAY 12 1990
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL MISSISSIPPI
 
   ...EASTERN MARION COUNTY
 
IN SOUTHEAST MISSISSIPPI
 
   ...LAMAR COUNTY
 
AT 722 PM CDT...RADAR INDICATED A POSSIBLE TORNADO OVER NORTHEASTERN
MARION COUNTY...JUST NORTHEAST OF COLUMBIA. THIS STORM WILL BE MOVING
EASTWARD INTO LAMAR COUNTY BETWEEN SUMRALL AND PURVIS. MOVEMENT WAS
EAST AT 40 MILES AN HOUR.
 
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS IN AN
INTERIOR ROOM ON THE LOWEST FLOOR.  GET UNDER STURDY FURNITURE.
USE PILLOWS OR CUSHIONS TO COVER YOUR HEAD.
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The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 7:40 PM CDT	Flash Flood Warning	JAN	Jones	5 hr
May 12, 8:35 PM CDT	Tornado Warning	JAN	Lamar, Marion	40 min
May 12, 9:31 PM CDT	Flash Flood Warning	JAN	Forrest	3 hr
May 12, 9:58 PM CDT	Flash Flood Warning	JAN	Copiah, Covington, Jefferson Davis, Lawrence, Simpson, Smith	2 hr
May 12, 9:58 PM CDT	Flash Flood Warning	JAN	Franklin, Jefferson, Lincoln	2 hr
May 12, 11:16 PM CDT	Flash Flood Warning	JAN	Wayne	6 hr
May 13, 12:18 AM CDT	Severe Thunderstorm Warning	JAN	Copiah	27 min
May 13, 12:32 AM CDT	Flash Flood Warning	JAN	Jones	5 hr
May 13, 2:24 AM CDT	Flash Flood Warning	JAN	Claiborne	4 hr
May 13, 5:07 AM CDT	Flash Flood Warning	JAN	Jones	4 hr

Nearby

Tornado Warnings in Mississippi, 1990 Every tornado warning in 1990 Tornadoes 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.