Alert archive / Louisiana / Tornado Warnings in 1989

Tornado Warning 4, NWS New Orleans, LA

May 18, 1989Saint Landry Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at May 18, 1989, 12:29 PM CDT for Saint Landry Parish, Louisiana. It was in force for 61 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 18, 1989, 12:29 PM CDT (17:29 UTC)
Expired
May 18, 1989, 1:30 PM CDT
In force
61 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Saint Landry Parish, LA

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 18, 12:34 PM CDTThunderstorm Wind 0St. Landry, LA
May 18, 12:52 PM CDTThunderstorm Wind 0St. Landry, LA

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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.5 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 1989-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 1989-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.19395878Sfc1 km3 km6 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
619 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
353 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 KBTR 181730
TORBTR
LAC097-181830-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BATON ROUGE LA
1229 PM CDT THU MAY 18 1989
 
THE NATIONAL WEATHER SERVICE IN BATON ROUGE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  130 PM CDT
FOR PEOPLE IN THE FOLLOWING PARISH...
 
IN EAST CENTRAL LOUISIANA
          ...ST.LANDRY
 
RADAR INDICATED A TORNADO 10 MILES NORTHEAST OF LAFAYETTE NEAR
ARNAUDVILLE LOUISIANA MOVING NORTHEAST AT 30 MPH. A TORNADO WAS
REPORTED WITH THIS STORM WITHIN THE LAST 30 MINUTES BY THE
LAFAYETTE PARISH CIVIL DEFENSE.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

What forecasters said that day

The local office's own words before this tornado 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 18, 7:25 AM CDT, 5 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
725 AM CDT THU MAY 18 1989

..A FLASH FLOOD WATCH CONTINUES IN EFFECT FOR AVOYELLES...CATAHOULA...
CONCORDIA AND ST LANDRY PARISHES THROUGH TODAY.

RADAR SHOWED AN AREA OF RAIN SPREAD ACROSS MUCH OF CENTRAL AND
SOUTHWEST AND INTO PARTS OF EAST CENTRAL LOUISIANA.  WITHIN THE AREA
OF RAIN WERE A FEW THUNDERSTORMS WITH HEAVY RAIN.  THE LEADING EDGE OF
THE AREA OF RAIN EXTENDED SOUTH FROM JACKSON MISSISSIPPI TO THE
SOUTHWEST CORNER OF MISSISSIPPI TO NEAR LAFAYETTE.  THE AREA OF RAIN
WAS SPREADING EAST ABOUT 15 MPH.

HEAVY RAINS...DANGEROUS LIGHTNING AND POSSIBLY SOME HAIL ARE ASSOCIATED
WITH THE THUNDERSTORMS.  THE GROUND IS SATURATED AND THE HEAVY RAINS
WILL LIKELY CAUSE FLOODING OF ROADS AND LOW LYING AREAS.  THUNDERSTORMS
ARE EXPECTED TO INCREASE WITHIN THE AREA OF RAIN BY AFTERNOON.
Local storm report, May 18, 11:41 AM CDT, 48 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1142 AM CDT THU MAY 18 1989

MAY 18 1989...

     1134 AM CDT...TREES AND POWER LINES DOWN...HIGH WINDS AND STREET
     FLOODING IN WASHINGTON LA ABOUT 7 MILES NORTH OF OPELOUSAS...BY
     THE ST LANDRY PARISH SHERIFF OFFICE.  NO INJURIES.

The office that day

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

IssuedProductOfficeCountiesLasted
May 18, 11:22 AM CDTSevere Thunderstorm WarningLIXSaint Landry68 min
May 18, 11:51 AM CDTSevere Thunderstorm WarningLIXPointe Coupee, Saint Landry69 min
May 18, 12:13 PM CDTSevere Thunderstorm WarningLIXIberia, Saint Martin62 min
May 18, 12:29 PM CDTTornado WarningLIXSaint Martin46 min
May 18, 12:57 PM CDTSevere Thunderstorm WarningLIXIberville, Pointe Coupee, West Baton Rouge63 min
May 18, 12:57 PM CDTSevere Thunderstorm WarningLIXWest Feliciana63 min
May 18, 1:14 PM CDTTornado WarningLIXIberville, West Baton Rouge46 min
May 18, 1:57 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge48 min
May 18, 2:30 PM CDTSevere Thunderstorm WarningLIXIberia, Saint Martin60 min
May 18, 3:38 PM CDTSevere Thunderstorm WarningLIXIberville, West Baton Rouge52 min
May 18, 4:01 PM CDTSevere Thunderstorm WarningLIXAscension, East Baton Rouge44 min
May 18, 4:50 PM CDTSevere Thunderstorm WarningLIXAssumption, Saint Martin, St. Mary55 min
May 18, 5:09 PM CDTSevere Thunderstorm WarningLIXLafourche, Terrebonne66 min
May 18, 5:27 PM CDTSevere Thunderstorm WarningLIXTangipahoa63 min
May 18, 5:33 PM CDTSevere Thunderstorm WarningLIXLivingston42 min
May 18, 6:33 PM CDTSevere Thunderstorm WarningLIXTangipahoa, Washington42 min

Nearby

Tornado Warnings in Louisiana, 1989Every tornado warning in 1989Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.