Alert archive / Texas / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 13, NWS Shreveport, LA

March 20, 1989Harrison County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 20, 1989, 9:28 PM CST for Harrison County, Texas. It was in force for 92 min.

The area

The counties it named.

The facts

Issued
Mar 20, 1989, 9:28 PM CST (03:28 UTC)
Expired
Mar 20, 1989, 11:00 PM CST
In force
92 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County Harrison County, TX

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

Longview/Gregg, TX (KGGG), launched 00:00Z, 3.5 hours before the alert went out and 31 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, Longview/Gregg, TX at 00:00Z on 1989-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1920 joules per kilogram.LCLEL10008507005003002001001 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, Longview/Gregg, TX at 00:00Z on 1989-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 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
1920 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1249 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
231 m²/s²
Significant tornado parameter
1.0
Supercell composite
7.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 210333
SVRSHV
LAC015-017-TXC203-210500-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
928 PM CST MON MAR 20 1989
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1100 PM CST
FOR PEOPLE IN THE FOLLOWING COUNTIES AND PARISHES...
 
IN NORTHWEST LOUISIANA
          ...BOSSIER...CADDO
IN NORTHEAST TEXAS
          ...SOUTHEAST HARRISON
 
AT 928 PM WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A SEVERE
THUNDERSTORM ABOUT 8 MILES NORTHEAST OF CARTHAGE TEXAS MOVING TO
THE NORTHEAST AT 35 MPH. THIS STORM HAS PRODUCED HAIL UP TO ONE
INCH IN SIZE AND MAY PRODUCE STRONG AND DAMAGING WINDS.
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
SEVERE THUNDERSTORM WARNING FOR RUSK COUNTY IN NORTHEAST TEXAS
NO LONGER IN EFFECT.
 
A SEVERE THUNDERSTORM WARNING CONTINUES IN EFFECT FOR SHELBY COUNTY
IN NORTHEAST TEXAS UNTIL 1000 PM.

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, Mar 20, 3:48 PM CST, 5 hours 40 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
345 PM CST MON MAR 20 1989

...AN AREA OF SHOWERS AND THUNDERSTORMS WITH ISOLATED STRONG
THUNDERSTORMS CONTINUES TO AFFECT CENTRAL INTO NORTHEAST LOUISIANA...

AT 335 PM CST NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT INDICATED
A LARGE AREA OF SHOWERS AND SCATTERED THUNDERSTORMS WITH ISOLATED
STRONG THUNDERSTORMS ACROSS A LARGE PART OF CENTRAL INTO NORTHEAST AND
EAST CENTRAL LOUISIANA ON INTO MISSISSIPPI. THE STRONGEST THUNDERSTORMS
WERE LOCATED TO THE SOUTH AND SOUTHEAST OF ALEXANDRIA..ALSO JUST NORTH
OF COLFAX LOUISIANA. ANOTHER STRONG THUNDERSTORM WAS INDICATED NEAR
RUSTON. THE AREA OF SHOWERS AND THUNDERSTORMS WAS MOVING TO THE EAST AT
20 MILES AN HOUR WHILE THE INDIVIDUAL CELLS WERE MOVING TO THE NORTH-
EAST AT 30 MILES AN HOUR.

A TORNADO WATCH REMAINS IN EFFECT FOR A LARGE PART OF CENTRAL AND
SOUTHERN LOUISIANA UNTIL 6 PM THIS EVENING. PERSONS SHOULD REMAIN

ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND LISTEN FOR FURTHER
STATEMENTS AND POSSIBLE WARNINGS.

ELSEWHERE..A BAND OF SCATTERED SHOWERS AND THUNDERSTORMS WAS DEVELOPING
AHEAD OF A STRONG COLD FRONT FROM EXTREME WEST CENTRAL AKANSAS EAST OF
FORT SMITH INTO SOUTHEAST OKLAHOMA. THIS BAND IS EXPECTED TO DEVELOP
SOUTHWESTWARD AS IT MOVES TO THE SOUTHEAST. THE STORMS ARE ALSO
EXPECTED TO INTENSIFY THROUGH THE AFTERNOON WITH THEIR SOUTHEASTWARD
PROGRESSION AND POSSIBLY BECOME STRONG TO SEVERE AS THEY MOVE INTO THE
ARKLATEX LATE THIS AFTERNOON AND THIS EVENING.
Special weather statement, Mar 20, 4:56 PM CST, 4 hours 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
455 PM CST MON MAR 20 1989

...A TORNADO WATCH IN EFFECT UNTIL 1000 PM FOR MUCH OF NORTHEAST
TEXAS AND SOUTHWEST ARKANSAS AND EXTREME SOUTHEAST OKLAHOMA...
...A TORNADO WATCH IN EFFECT UNTIL 600 PM FOR A LARGE PART OF CENTRAL
AND SOUTHERN LOUISIANA...
...SHOWERS AND THUNDERSTORMS CONTINUE OVER NORTHEAST LOUISIANA
AND HAD DEVELOPED DURING THE PAST HOUR OVER SOUTHEAST OKLAHOMA..
SOUTHWEST ARKANSAS..AND NORTHEAST TEXAS...

AT 445 PM WEATHER SERVICE RADAR IN SHREVEPORT SHOWED AN AREA OF SHOWERS
AND STRONG THUNDERSTORMS OVER NORTHEAST AND EAST CENTRAL LOUISIANA THAT
EXTENDED FROM NEAR BASTROP AND MONROE SOUTH TO ALEXANDRIA AND BATON
ROUGE. THE STRONGER THUNDERSTORMS IN NORTHEAST LOUISIANA WERE INDICATED
NEAR RAYVILLE SOUTHEAST TO EAST OF WINNSBORO AND BETWEEN COLUMBIA AND
HARRISONBURG. THE SHOWERS AND THUNDERSTORMS WERE MOVING TO THE NORTHEAST
AT 35 MPH AND HAVE BEEN PRODUCING GUSTY WINDS..FREQUENT LIGHTNING..
AND BREIF BUT HEAVY RAINS.
.
RADAR ALSO SHOWED SCATTERED SHOWERS AND STRONG THUNDERSTORMS FROM
EAST OF FORT SMITH SOUTHWEST TO NEAR MENA AND ASHDOWN ARKANSAS AND
INTO NORTHEAST TEXAS TO NEAR NEW BOSTON. ALSO A LINE OF SHOWERS AND
STRONG THUNDERSTORMS FROM NEAR GREENVILLE TEXAS SOUTHWEST TO NEAR
WACO AND TEMPLE. THE STRONGER THUNDERSTORMS IN SOUTHWEST ARKANSAS
WERE INDICATED NEAR MENA AND DE QUEEN. MOVEMENT WAS TO THE NORTHEAST
AT 35 MPH WITH THE STORMS PRODUCING BRIEF BUT HEAVY RAINFALL..STRONG
AND GUSTY WINDS..AND FREQUENT BUT DANGEROUS LIGHTNING.
Special weather statement, Mar 20, 6:02 PM CST, 3 hours 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
600 PM CST MON MAR 20 1989

...A TORNADO WATCH IN EFFECT UNTIL 1000 PM FOR MUCH OF NORTHEAST
TEXAS AND SOUTHWEST ARKANSAS AND EXTREME SOUTHEAST OKLAHOMA...
...SHOWERS AND THUNDERSTORMS CONTINUE OVER NORTHEAST LOUISIANA BUT
WILL MOST LIKELY MOVE INTO MISSISSIPPI DURING THE NEXT HOUR...
...SHOWERS AND THUNDERSTORMS..SOME STRONG..CONTINUE TO DEVELOP OVER
SOUTHWEST ARKANSAS AND NORTHEAST TEXAS...

AT 545 PM WEATHER SERVICE RADAR IN SHREVEPORT SHOWED SCATTERED SHOWERS
AND STRONG THUNDERSTORMS OVER NORTHEAST LOUISIANA FROM NEAR LAKE
PROVIDENCE SOUTH INTO EAST CENTRAL LOUISIANA AND THE ADJACENT STATE
OF MISSISSIPPI. THE STRONGER THUNDERSTORMS IN NORTHEAST LOUISIANA WERE
INDICATED NEAR LAKE PROVIDENCE MOVING TO THE NORTHEAST AT 35 MPH AND
SHOULD MOVE INTO  MISSISSIPPI DURING THE NEXT HOUR.
RADAR ALSO SHOWED WIDELY SCATTERED SHOWERS AND STRONG THUNDERSTORMS
OVER SOUTHWEST ARKANSAS THAT EXTENDED INTO NORTHEAST AND NORTH CENTRAL
TEXAS FROM NEAR RUSSELVILLE..MURFREESBORO..AND ASHDOWN ARKANSAS TO
NEAR MAUD..LINDEN..AND LONGVIEW TEXAS. RADAR SHOWED ANOTHER
AREA OF WIDELY SCATTERED SHOWERS AND STRONG THUNDERSTORMS FROM NEAR
EMORY SOUTHWEST TO NEAR CORSICANA..GROSBECK..AND TEMPLE TEXAS.
THE STRONGER THUNDERSTORMS IN SOUTHWEST ARKANSAS WERE INDICATED NEAR
NASHVILLE AND OKAY AND IN NORTHEAST TEXAS BETWEEN TEXARKANA AND
MAUD. THE SHOWERS AND THUNDERSTeORMS WERE MOVING TO THE EAST AT 35 MPH
WHILE THE OVERALL AREAS SPREAD TO THE SOUTHEAST AT 20 MPH. THE STORMS
WERE PRODUCING GUSTY WINDS..FREQUENT AND DANGEROUS LIGHTNING..BRIEF
BUT HEAVY RAINFALL..AND POSSIBLY HAIL.

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 20, 8:47 PM CSTSevere Thunderstorm WarningSHVPanola, Rusk, Shelby73 min

Nearby

Severe Thunderstorm Warnings in Texas, 1989Every severe thunderstorm warning in 1989

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.