Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 92, NWS Jackson, MS

May 12, 1990Hinds County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 12, 1990, 2:30 PM CDT for Hinds County, Mississippi. It was in force for 45 min. 2 reports 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, 2:30 PM CDT (19:30 UTC)
Expired
May 12, 1990, 3:15 PM CDT
In force
45 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Hinds 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
May 12, 2:50 PM CDTThunderstorm Wind 52Hinds, MS
May 12, 3:07 PM CDTThunderstorm Wind 52Hinds, 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, 7.5 hours before the alert went out and 35 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 1990-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 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 1990-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.193958Sfc1 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
7 J/kg
Mixed-layer CIN
-159 J/kg
Mixed-layer LCL
604 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAN 121932
SVRJAN
MSC049-122015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
230 PM CDT SAT MAY 12 1990
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  315 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MISSISSIPPI
 
   ...SOUTHERN HINDS COUNTY
 
AT 226 PM...RADAR INDICATED A SEVERE THUNDERSTORM JUST NORTHEAST OF
HERMANVILLE IN EXTREME NORTHEAST CLAIBORNE COUNTY MOVING EASTWARD
ALONG THE SOUTHERN HINDS AND NORTHERN COPIAH COUNTY LINES. ON ITS
PRESENT TRACK...THIS STORM SHOULD PASS NEAR UTICA AND CRYSTAL SPRINGS
DURING THE NEXT HOUR. SEVERE THUNDERSTORM WARNINGS HAVE ALREADY BEEN
POSTED FOR CLAIBORNE AND NORTHERN COPIAH COUNTIES. THIS STORM IS
MOVING TOWARD THE EAST AT 40 MPH.
 
 
IF YOU ARE OUTSIDE...SEEK SHELTER IN A STRONG BUILDING AWAY FROM
WINDOWS.  DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN...AND
DEADLY LIGAHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
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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, May 12, 12:28 PM CDT, 2 hours 2 minutes before
MSZ001-002-003-004-006-008-010-121745-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1220 PM CDT SAT MAY 12 1990

RAIN AND THUNDERSTORMS CONTINUE TO SPREAD INTO WEST MISSISIPPI

AT 1215 PM A VERY STRONG THUNDERSTORM WAS LOCATED IN LOUISIANA ABOUT
15 MILES SOUTHEAST OF MONROE LOUISIANA. THIS STORM WAS MOVING TO THE
EAST AT 35 MILES AN HOUR...AND WILL CROSS THE RIVER INTO WARREN
COUNTY IN A LITTLE OVER AN HOUR. A SEVERE THUNDERSTORM WARNING IS IN
EFFECT FOR THIS STORM.

OTHER THUNDERSTORMS CONTINUE TO SPREAD OVER NORTHWEST MISSISSIPPI...AND
SOME OF THE STRONGER STORMS MAY BE ACCOMPANIED BY GUSTY WINDS IN EXCESS
OF 40 MILES AND HOURS...BRIEF VERY HEAVY RAIN...FREQUENT CLOUD TO GROUND
LIGHTNING AND POSSIBLE HAIL.

PERSONS IN WEST MISSISSIPPI SHOULD BE ON THE ALERT FOR POSSIBLE
THREATENING WEATHER FOR THE NEXT SEVERAL HOURS.
Special weather statement, May 12, 1:54 PM CDT, 36 minutes before
MSZ001-002-003-004-006-008-010-121900-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
130 PM CDT SAT MAY 12 1990

...SEVERE THUNDERSTORM WATCH NUMBER 219 REMAIN IN EFFECT FOR CENTRAL
AND SOUTH MISSISSIPPI...

AT 130 PM...A LINE OF STRONG THUNDERSTORMS  WITH VERY HEAVY RAINFALL
EXTENDED FORM VICKSBURG MISSISSIPPI TO TO JENA IN EAST LOUISIANA.

THE STRONGEST THUNDERSTORM WAS LOCATED 15 MILES SOUTHEAST OF VICKSBURG.

AT 145 PM PEA TO MARBLE SIZE HAIL...TORRENTAIL RAIN...AND VERY STRONG
WINDS WERE REPORTED BY THE VICKSBURG POLICE DEPARTMENT AT 145 PM.

MOVEMENT WAS EAST AT 35 MILES AN HOUR.

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 1:08 PM CDTSevere Thunderstorm WarningJANWarren67 min
May 12, 2:20 PM CDTSevere Thunderstorm WarningJANCopiah40 min
May 12, 2:20 PM CDTSevere Thunderstorm WarningJANClaiborne35 min
May 12, 3:00 PM CDTSevere Thunderstorm WarningJANRankin, Simpson45 min
May 12, 5:26 PM CDTSevere Thunderstorm WarningJANClarke34 min
May 12, 5:42 PM CDTSevere Thunderstorm WarningJANJefferson Davis33 min
May 12, 6:16 PM CDTSevere Thunderstorm WarningJANJefferson Davis29 min
May 12, 6:45 PM CDTSevere Thunderstorm WarningJANCovington30 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.