Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 73, NWS Memphis, TN

August 20, 1990Lee County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Aug 20, 1990, 6:57 PM CDT for Lee 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
Aug 20, 1990, 6:57 PM CDT (23:57 UTC)
Expired
Aug 20, 1990, 7:45 PM CDT
In force
48 min
Issued by
NWS Memphis, TN
Area
Whole counties

County Lee 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
Aug 20, 7:00 PM CDTHail 1Lee, 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

Little Rock, AR (KLZK), launched 12:00Z, 12.0 hours before the alert went out and 131 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, Little Rock, AR at 12:00Z on 1990-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Little Rock, AR at 12:00Z on 1990-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3621 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
49 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 KTUP 202357
SVRTUP
MSC081-210045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUPELO MS
657 PM CDT MON AUG 20 1990
 
THE NATIONAL WEATHER SERVICE IN TUPELO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  745 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST MISSISSIPPI
 
   ...SOUTHERN LEE COUNTY
 
AT 655 PM NATIONAL WEATHER SERVICE RADAR SHOWED A SEVERE THUNDERSTORM
JUST SOUTH OF TUPELO MOVING EAST AT 5 MPH. THIS STORM HAS A HISTORY OF
STRONG WIND WITH SEVERAL REPORTS OF TREES DOWN IN VERONA.
 
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.
 
NNNN

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, Aug 20, 5:03 PM CDT, 1 hour 54 minutes before
MSZ005-007-202300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUPELO MS
500 PM CDT MON AUG 20 1990

AT 500 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED STRONG
THUNDERSTORMS ACROSS MONROE AND LOWNDES COUNTY. THESE STORMS
ARE CAPABLE OF PRODUCING GUSTY WINDS IN THE 40 TO 50 MPH RANGE...VERY
HEAVY RAIN...FREQUENT LIGHTNING STRIKES AND POSSIBLE SMALL HAIL.

ONE OF THESE STORM PRODUCED A WIND GUST OF 48 MPH AS IT MOVED ACROSS
COUMBUS AIR FORCE BASE. YOU SHOULD STAY ALERT AND BE PREPARED TO SEEK
A SAFE SHELTER IF A WARNING SHOULD BE ISSUED.

THUNDERSTORMS ARE EXPECTED TO CONTINUE TO DEVELOPE ACROSS NORTHEAST
MISSISSIPPI THIS AFTERNOON IN THE HOT AND HUMID AIR OVER THE REGION.
THEY WILL USTART TO DIMINISH SHORTLY AFTER SUNDOWN.

STAY TUNED TO THIS STATION FOR THE LATEST WEATHER INFORMATION.
Special weather statement, Aug 20, 6:02 PM CDT, 55 minutes before
MSZ004-005-007-230000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUPELO MS
602 PM CDT MON AUG 20 1990

AT 600 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED THUNDERSTORMS TO
BE SCATTERED ACROSS MUCH OF NORTHEAST MISSISSIPPI. THE SEVERE
THUNDERSTORM THAT WAS IN NORTHEAST LOWNDES COUNTY HAS WEAKEN AND THE
WARNING HAS BEEN CANCELLED.

THESE THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING WILL BE CAPABLE
OF PRODUCING GUSTY WINDS IN THE 40 TO 50 MPH...HEAVY
RAINFALL...FREQUENT LIGHTNING STRIKES AND POSSIBLE HAIL AS THEY
DEVELOPE AND MOVE SLOWLY ACROSS NORTHEAST MISSISSIPPI. YOU SHOULD STAY
ALERT AND BE PREPARED TO SEEK A SAFE SHELTER IF A WARNING SHOULD BE
ISSUED.

SOME OF THESE STORMS WILL ALSO PRODUCE PONDING OF WATER ON ROADS AND
STREETS. IF YOU ARE DRIVING IN NORTHEAST MISSISSIPPI THIS AFTERNOON
AND EARLY EVENING YOU SHOULD USE EXTRA CAUTION IN THE VICINITY OF
HEAVY RAIN.

STAY TUNED TO THIS STATION FOR THE LATEST WEATHER INFORMATION.

NNNN

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 20, 5:22 PM CDTSevere Thunderstorm WarningMEGLowndes53 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.