Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 149, NWS Jackson, MS

June 21, 1990Carroll County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jun 21, 1990, 1:31 AM CDT for Carroll County, Mississippi. It was in force for 29 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: Jun 21, 1990, 1:31 AM CDT (06:31 UTC)
Expired: Jun 21, 1990, 2:00 AM CDT
In force: 29 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Carroll 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
Jun 21, 1:35 AM CDT	Thunderstorm Wind 0	Carroll, 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 00:00Z, 6.5 hours before the alert went out and 126 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: 1743 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1871 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 11 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 210632
SVRJAN
MSC015-210700-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
131 AM CDT THU JUN 21 1990
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  200 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MISSISSIPPI
 
   ...CARROLL COUNTY
 
AT 130 AM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY RADAR OVER
CARROLL COUNTY NEAR CENTERVILLE. THIS STORM WAS MOVING EAST AT 25
MILES AN HOUR.
 
 
SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 55 MPH...LARGE
HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 3:15 PM CDT	Severe Thunderstorm Warning	JAN	Madison	45 min
Jun 21, 3:44 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Noxubee	46 min
Jun 21, 4:58 PM CDT	Severe Thunderstorm Warning	JAN	Humphreys	62 min
Jun 21, 6:59 PM CDT	Severe Thunderstorm Warning	JAN	Winston	46 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1990 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.