Alert archive / Louisiana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 103, NWS Lake Charles, LA

April 12, 2000Allen Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 12, 2000, 11:45 AM CDT for Allen Parish, Louisiana. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 12, 2000, 11:45 AM CDT (16:45 UTC)
Expired
Apr 12, 2000, 12:45 PM CDT
In force
60 min
Issued by
NWS Lake Charles, LA
Area
Whole counties

County Allen Parish, LA

The radar

The Ft Polk radar (KPOE), 58 km from the middle of the area, began a volume at 16:46 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.8 hours before the alert went out and 69 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 2000-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1108 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 2000-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 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
1108 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
502 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

581 
WUUS54 KLCH 121646
SVRLCH
LAC003-121745-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1145 AM CDT WED APR 12 2000

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEN PARISH IN SOUTHWEST LOUISIANA

* UNTIL 1245 PM CDT

* AT 1138 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 15 MILES SOUTHWEST OF KINDER...MOVING NORTHEAST
  AT 20 MPH.

* THIS STORM WILL BE NEAR...
  LEBLANC BY 1210 PM CDT
  KINDER BY 1215 PM CDT
  OBERLIN BY 1245 PM CDT

SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND TORRENTIAL RAIN.

CALL 337-477-5285 TO REPORT SEVERE WEATHER TO THE WEATHER SERVICE.

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.

NWS Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 12, 9:05 AM CDT, 2 hours 40 minutes earlier.

Area forecast discussion, Apr 12, 9:05 AM CDT, 2 hours 40 minutes before
SOUTHEAST TEXAS AND SOUTHWEST LOUISIANA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE LAKE CHARLES LA
905 AM CDT WED APR 12 2000

WITH DECENT POSITIVE VORTICITY ADVECTION MOVING THROUGH THE AREA AND
SUCH CLOSE PROXIMITY TO THE SURFACE LOW...CHANCES FOR PRECIPITATION
WILL BE INCREASED FOR THE ENTIRE COUNTY WARNING AREA.  WILL REMOVE
MORNING FOG WORDING WHEN CONDITIONS WARRANT IT. HEAVY RAINS LIKELY
AS FRONTAL BOUNDARY SERVES AS FOCUSING MECHANISM TODAY.

.LCH...
LA...NONE
TX...NONE

UPDATED PRELIMINARY NUMBERS
LCH 75/57/74/58 7520
LFT 75/59/75/58 7530
AEX 68/56/73/55 9520
BPT 75/59/75/61 7520

22/11

In the hours before

Local storm report, Apr 12, 10:57 AM CDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
1057 AM CDT WED APR 12 2000

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1000 AM    4 W VINTON                LA   .75 INCH HAIL
04/12/00   CALCASIEU                      TRUCK DRIVER REPORTED ON
                                          I-10

1100 AM    NEDERLAND                 TX   FLOOD
04/12/00   JEFFERSON                     0945 AM    SABINE PASS               TX   78 MPH TSTM WIND GUST
04/12/00   JEFFERSON                      POWER OUT ACROSS TOWN.
                                          REPORTED BY NWS DAPM

0900 AM    PORT NECHES               TX   FLOOD
04/12/00   JEFFERSON                      WATER IN HOMES ON CROCKETT
                                          AND CALIFORNIA STREETS
Local storm report, Apr 12, 11:34 AM CDT, 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
1134 AM CDT WED APR 12 2000

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1120 AM    4 S HACKBERRY             LA   60 MPH TSTM WIND GUST
04/12/00   CAMERON                        REPORTED BY SHIP IN
                                          CALCASIEU SHIP CHANNEL
Local storm report, Apr 12, 11:42 AM CDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
1142 AM CDT WED APR 12 2000

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1130 AM    SULPHUR                   LA   .75 INCH HAIL
04/12/00   CALCASIEU

1130 AM    SULPHUR                   LA   70 MPH TSTM WIND GUST
04/12/00   CALCASIEU                      SKYWARN REPORTED DAMAGE IN
                                          MAPLEWOOD
                                          AREA...AT MCMURRAY
                                          PARK...TREES BLOWN
                                          DOWN.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 9:23 AM CDTSevere Thunderstorm WarningLCHCalcasieu67 min
Apr 12, 10:32 AM CDTSevere Thunderstorm WarningLCHBeauregard, Calcasieu58 min
Apr 12, 11:08 AM CDTSevere Thunderstorm WarningLCHCameron67 min
Apr 12, 11:24 AM CDTSevere Thunderstorm WarningLCHCalcasieu36 min
Apr 12, 11:36 AM CDTSevere Thunderstorm WarningLCHJefferson Davis54 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2000Every severe thunderstorm warning in 2000

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; radar from the NEXRAD Level II archive.