Alert archive / Louisiana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 108, NWS Lake Charles, LA

April 23, 2000Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 23, 2000, 2:06 PM CDT for Vermilion Parish, Louisiana. It was in force for 54 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: Apr 23, 2000, 2:06 PM CDT (19:06 UTC)
Expired: Apr 23, 2000, 3:00 PM CDT
In force: 54 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

County Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 95 km from the middle of the area, began a volume at 19:10 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.

What was reported inside it

Time	Report	Where	Remark
Apr 23, 2:06 PM CDT	Hail 0.88	Kaplan, 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.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.1 hours before the alert went out and 93 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 833 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 332 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

600 
WUUS54 KLCH 231906
SVRLCH
LAC113-232000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
206 PM CDT SUN APR 23 2000

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

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

* UNTIL 300 PM CDT

* AT 205 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF KAPLAN...MOVING EAST AT 65
  MPH.

* THIS STORM WILL BE NEAR...
  MEAUX BY 215 PM CDT
  ABBEVILLE BY 220 PM CDT
  DELCAMBRE...ERATH BY 225 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 23, 9:30 AM CDT, 4 hours 36 minutes earlier.

Area forecast discussion, Apr 23, 9:30 AM CDT, 4 hours 36 minutes before

SOUTHEAST TEXAS AND SOUTHWEST LOUISIANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
930 AM CDT SUN APR 23 2000

SATELLITE IMAGERY SHOWING MOST OF THE EARLY THUNDERSTORM ACTIVITY
MOVING RAPIDLY...50 MPH...EASTWARD OUT OF AREA. ATMOSPHERE HAS
HAD TENDENCY TO INDICATE EXPLOSIVE GROWTH OF THUNDERSTORMS TO
SEVERE LEVELS. WILL CONTINUE TO KEEP SEVERE THUNDERSTORM WORDING
INTO FORECAST AND UP POPS TO CHC ALL AREAS. MAIN CONCERN IS DRYLINE
OR MOIST/DRY BOUNDRY FROM WICHITA FALLS TO DEL RIO. THERE IS A MARKED
GRADIENT WHERE THUNDERSTORMS WILL LIKELY DEVELOP AND MOVE RAPIDLY
EAST THIS AFTERNOON. INSTABILITIES WILL REMAIN HIGH OR VERY UNSTABLE
WITH SIGNIFICANT LOW AND MID LEVEL MOISTURE ON LCH/CRP SOUNDINGS.
CAPPING LOOKS STRONG BUT SQUALL LINE DEVELOPMENT OUT WEST AND RAPID
MOVEMENT TO THE EAST WILL LIKELY NEGATE THE CAPPING EFFECT.

IN ADDITION...APPEARS TO BE FAVORABLE WIND AND SPEED SHEAR
ENVIRONMENT FOR SUPERCELL GROWTH. A 90 KNOT JET WILL EXIST NORTH
OF THE AREA WITH RIGHT REAR QUADRANT POSSIBLY IN LINE WITH CWA.

06

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

PRELIMINARY NUMBERS...
LCH 82/64/85/59 4--0
LFT 79/63/85/58 42-0
AEX 82/60/85/54 5--0
BPT 83/62/87/59 4--0

In the hours before

Local storm report, Apr 23, 8:20 AM CDT, 5 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
820 AM CDT SUN APR 23 2000

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

0820 AM    VOTAW                     TX   .75 INCH HAIL
04/23/00   HARDIN

Local storm report, Apr 23, 9:37 AM CDT, 4 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
937 AM CDT SUN APR 23 2000

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

0935 AM    5 N LEESVILLE             LA   1.75 INCH HAIL
04/23/00   VERNON

22

Local storm report, Apr 23, 9:45 AM CDT, 4 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
945 AM CDT SUN APR 23 2000

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

0825 AM    WILDWOOD                  TX   .75 INCH HAIL
04/23/00   HARDIN                         REPORTED BY PUBLIC

22

Local storm report, Apr 23, 12:34 PM CDT, 1 hour 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES, LA
1234 PM CDT SUN APR 23 2000

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

1215 PM    2 N MARKSVILLE            LA   1.00 INCH HAIL
04/23/00   AVOYELLES                 REPORTED BY COOP OBSERVER

22

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 9:30 AM CDT	Severe Thunderstorm Warning	LCH	Vernon	45 min
Apr 23, 12:05 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles	55 min
Apr 23, 3:22 PM CDT	Severe Thunderstorm Warning	LCH	Saint Martin	68 min
Apr 23, 3:30 PM CDT	Severe Thunderstorm Warning	LCH	Lafayette	60 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2000 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.