Alert archive / Louisiana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 117, NWS Lake Charles, LA

May 1, 2000Acadia Parish, Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 1, 2000, 11:25 AM CDT for Acadia Parish, Vermilion Parish, Louisiana. It was in force for 50 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: May 1, 2000, 11:25 AM CDT (16:25 UTC)
Expired: May 1, 2000, 12:15 PM CDT
In force: 50 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

Counties Acadia Parish, LA, Vermilion Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.4 hours before the alert went out and 81 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: 783 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 701 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 128 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 
WUUS54 KLCH 011624
SVRLCH
LAC001-113-011715-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1125 AM CDT MON MAY 1 2000

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

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

* UNTIL 1215 PM CDT

* AT 1125 AM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 4 MILES NORTHWEST OF IOTA TO 12 MILES
  SOUTHWEST OF IOTA TO 17 MILES WEST OF ESTHERWOOD...MOVING EAST AT 20
  MPH.
  
THIS LINE WILL MOVE TO IOTA       BY 1135 AM CDT
                       ESTHERWOOD BY 1140 AM CDT
                       KAPLAN     BY 1145 AM CDT 

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

THIS THUNDERSTORM IS CAPABLE OF PRODUCING VERY LARGE HAIL WHICH COULD
CAUSE SIGNIFICANT DAMAGE TO PROPERTY.

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 May 1, 9:45 AM CDT, 1 hour 40 minutes earlier.

Area forecast discussion, May 1, 9:45 AM CDT, 1 hour 40 minutes before

SOUTHEAST TEXAS AND SOUTHWEST LOUISIANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
945 AM CDT MON MAY 1 2000

TSTM ACTVTY DEVELOPED ALG DRY LN OVR WEST TX YDA EVE PUSHING ACRS TX
OVRNGHT. OUTFLOW BNDRY FM COMPLEX MOVG INTO THE NW GULF WITH GULF
MSTR LIFTING ABV BNDRY AND FALLING AS PRECIP INTO SE TX AND SOUTHERN
LA. STRENGTH AND AREA OF ACTVTY "MCS" CONTS TO DIMINISH OVR SE TX AND
EXTREME SW LA W/ THIS TREND EXPECTED TO CONT INTO THE EARLY AFTN
HRS.

MRNG SOUNDING "LCH" MODIFIED HAS AFTN CAPES AROUND 3500 (J/KG)...
WET BULB ZERO AT 9000 FT. MRNG RECIP WATER ABT 1.2 INCHES BUT
THIS IS CHANGING AS I WRITE.

SOUTHERLY FLOW TDY... COMBINED WITH INSTABILITY IN PLACE... SOME
DIRNURAL HEATING "CLDS TO HOLD THIS DOWN A TAD BIT" AND PROXIMITY OF
UPR LVL SUPPORT "OVR NRN TX"  WILL MEAN REDEVELOPMENT OF PRECIP LATE
THIS AFTN INTO THE EVE HRS.THE REAL QUESTION IS HOW MUCH SUNSHINE
TDY. BELIEVE THAT THIS TO BE LIMITED BUT WITH OLD BNDRS AND SOME
HEATING... ACTVTY TO REDEVELOP OVR TX MOVING INTO LA.

MDLS CONT THE FLIP/FLOP ON SOLS. WITH NGM OF LTL USE.

HAVE AMENDED ZONES FOR SOME MINOR CHANGES.

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

PRELIM NUMBERS...
LCH 82/66/78/63 4343
LFT 84/64/80/62 2121
AEX 84/63/77/60 2121
BPT 83/67/78/64 4343

K. KUYPER

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; the sounding from the Mesonet's radiosonde archive.