Alert archive / Louisiana / Tornado Warnings in 1990

Tornado Warning 34, NWS Lake Charles, LA

December 21, 1990Calcasieu Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Dec 21, 1990, 12:29 PM CST for Calcasieu Parish, Louisiana. It was in force for 31 min.

The area

The counties it named.

The facts

Issued
Dec 21, 1990, 12:29 PM CST (18:29 UTC)
Expired
Dec 21, 1990, 1:00 PM CST
In force
31 min
Issued by
NWS Lake Charles, LA
Area
Whole counties

County Calcasieu Parish, LA

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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 6.5 hours before the alert went out and 19 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 1990-12-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1489 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, Lake Charles Mun, LA at 12:00Z on 1990-12-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 247 square meters per square second.1939587897Sfc1 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
1489 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
546 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
247 m²/s²
0-3 km storm-relative helicity
250 m²/s²
Significant tornado parameter
2.4
Supercell composite
9.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLCH 211830
TORLCH
LAC019-211900-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1229 PM CST FRI DEC 21 1990
 
THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  100 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST LOUISIANA
 
   ...CALCASIEU PARISH
 
AT 12:26 PM...
THE CALCASIEU SHERIFF OFFICE REPORTED SEVERAL TORNADOES IN THE
CARLYSS AREA.  THE STORM WAS MOVING NORTH AT 40 MPH.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...SEEK SHELTER IN A NEARBY
REINFORCED BUILDING.  GET UNDER A PIECE OF STURDY FURNITURE
PREFERABLY IN AN INTERIOR ROOM ON THE LOWEST FLOOR.  USE BLANKETS
OR PILLOWS TO COVER YOU{R BODY.  AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 21, 12:08 PM CSTSevere Thunderstorm WarningLCHCalcasieu, Cameron67 min
Dec 21, 12:34 PM CSTTornado WarningLCHAllen, Jefferson Davis41 min
Dec 21, 1:15 PM CSTSevere Thunderstorm WarningLCHAllen, Rapides60 min
Dec 21, 2:22 PM CSTSevere Thunderstorm WarningLCHRapides53 min
Dec 21, 2:56 PM CSTTornado WarningLCHRapides34 min
Dec 21, 5:57 PM CSTSevere Thunderstorm WarningLCHVernon63 min

Nearby

Tornado Warnings in Louisiana, 1990Every tornado warning in 1990Tornadoes 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.