Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 175, NWS Jackson, MS

July 8, 1990Kemper County, Lauderdale County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 8, 1990, 6:33 PM CDT for Kemper County, Lauderdale County, Mississippi. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Jul 8, 1990, 6:33 PM CDT (23:33 UTC)
Expired
Jul 8, 1990, 7:15 PM CDT
In force
42 min
Issued by
NWS Jackson, MS
Area
Whole counties

Counties Kemper County, MS, Lauderdale 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

Jackson, MS (KJAN), launched 12:00Z, 11.6 hours before the alert went out and 137 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 1990-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 57 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 1990-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 square meters per square second.1939Sfc1 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
57 J/kg
Mixed-layer CIN
-145 J/kg
Mixed-layer LCL
1650 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
32 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 KMEI 082335
SVRMEI
MSC069-075-090015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MERIDIAN MS
633 PM CDT SUN JUL 8 1990
 
THE NATIONAL WEATHER SERVICE IN MERIDIAN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL MISSISSIPPI
 
   ...KEMPER COUNTY...LAUDERDALE COUNTY
 
AT 5:25 PM CDT MERIDIAN WEATHER RADAR INDICATED A SEVERE THUNDERSTORM
20 MILES NORTH OF MERIDIAN MOVING EAST AT 10 MPH.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, Jul 8, 3:07 PM CDT, 3 hours 26 minutes before
MSZALL-082215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
306 PM CDT SUN JUL 8 1990

...HEAT INDEX AROUND 110 OVER MUCH OF MISSISSIPPI THIS AFTERNOON AND
MONDAY...

THE UPPER LEVEL HIGH PRESSURE SYSTEM WHICH HAS BEEN NEARLY STATIONARY
OVER THE MID SOUTH HAS RESULTED IN ANOTHER DAY OF UNCOMFORTABLY HOT
WEATHER.  AT MID AFTERNOON...TEMPERATURES HAD WARMED INTO THE MID TO
UPPER 90S STATEWIDE.  THE HUMIDITIES HAVE REMAINED HIGH ENOUGH TO
PRODUCE A HEAT INDEX BETWEEN 105 AND 110 OVER MUCH OF THE STATE.

PEOPLE SHOULD AVOID PROLONGED PERIODS OF UNNECESSARY AND STRESSFUL
OUTDOOR ACTIVITY.  IF POSSIBLE...WAIT UNTIL A COOLER TIME OF THE DAY.

LITTLE CHANGE IS EXPECTED MONDAY.  IT IS HIGHLY LIKELY THAT THE HEAT
INDEX WILL AGAIN RISE TO AROUND 110 DURING THE LATE AFTERNOON.

A LONG RANGE LOOK INTO THE WEEK SHOWS SOME HOPE.  THE UPPER LEVEL HIGH
WILL BE BREAKING DOWN AROUND THE MIDDLE OF THE WEEK.  THIS MAY MEAN A
RETURN TO LESS OPPRESSIVE CONDITIONS BY THE END OF THE WEEK.

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; the sounding from the Mesonet's radiosonde archive.