Alert archive / Louisiana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 151, NWS Lake Charles, LA

August 21, 2000Cameron Parish, Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Aug 21, 2000, 10:54 AM CDT for Cameron Parish, Vermilion Parish, Louisiana. It was in force for 66 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Aug 21, 2000, 10:54 AM CDT (15:54 UTC)
Expired: Aug 21, 2000, 12:00 PM CDT
In force: 66 min
Issued by: NWS Lake Charles, LA
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Cameron Parish, LA, Vermilion Parish, LA

What was reported inside it

Time	Report	Where	Remark
Aug 21, 11:05 AM CDT	Thunderstorm Wind	Pecan Is, 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, 3.9 hours before the alert went out and 85 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: 1631 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1082 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.4

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KLCH 211556
SVRLCH
LAC023-113-211700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1054 AM CDT MON AUG 21 2000

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

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

* UNTIL NOON CDT

* AT 1047 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 24 MILES SOUTH OF VERMILION PARISH...MOVING
  NORTHWEST AT 20 MPH.

* THIS STORM WILL BE NEAR...
RURAL SOUTHWESTERN VERMILION PARISH RURAL SOUTHEASTERN CAMERON AND 
NEAR GRAND CHENIER BY 1150 AM.

SEVERE THUNDERSTORMS PR|ODUCE 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.

LAT...LON 2947 9235 2959 9222 2989 9279 2970 9291

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 12:24 PM CDT	Severe Thunderstorm Warning	LCH	Cameron	66 min
Aug 21, 3:10 PM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Vernon	65 min
Aug 21, 4:41 PM CDT	Severe Thunderstorm Warning	LCH	Allen	49 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.