Alert archive / Louisiana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 109, NWS Lake Charles, LA

April 23, 2000Saint Martin Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 23, 2000, 3:22 PM CDT for Saint Martin Parish, Louisiana. It was in force for 68 min. No storm report in the archive falls 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.

The facts

Issued: Apr 23, 2000, 3:22 PM CDT (20:22 UTC)
Expired: Apr 23, 2000, 4:30 PM CDT
In force: 68 min
Issued by: NWS Lake Charles, LA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Saint Martin Parish, LA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 23, 2:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.4 hours before the alert went out and 167 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.

931 
WUUS54 KLCH 232024
SVRLCH
LAC099-232130-

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

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  UPPER ST. MARTIN PARISH IN SOUTH CENTRAL LOUISIANA

* UNTIL 430 PM CDT

* AT 321 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER BREAUX BRIDGE...MOVING EAST AT 55 MPH.

* THIS STORM WILL BE NEAR...
  HENDERSON BY 330 PM CDT
  BUTTE LA ROSE BY 335 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.

LAT...LON 3037 9192 3009 9190 3032 9080 3058 9087

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, 2:30 PM CDT, 52 minutes earlier.

Area forecast discussion, Apr 23, 2:30 PM CDT, 52 minutes before

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

SFC OBSERVATIONS INDICATE DRYLINE FROM DFW EXTENDING SOUTH TO
WACO TO AUSTIN TO SAN ANTONIO. TEMPERATURES HAVE REBOUNDED WELL
INTO THE UPPER 80S TO MID 90 NEAR DRYLINE. MOISTURE CONTINUES TO
STREAM IN FROM THE GULF WITH DEWPOINTS INTO THE LOWER 70S. SATELLITE
IMAGERY SHOWING CONVECTION FIRING UP ALONG THE DRYLINE AND SHOULD
MOVE RAPIDLY EAST INTO UNSTABLE MOIST ENVIRONMENT OVER SOUTHEAST
TEXAS AND WESTERN LOUISIANA. STRONG UPPER LEVEL JET CONTINUES TO
ENHANCE INFLOW INTO THUNDERSTORMS WITH MOST REACHING SEVERE SHORTLY
AFTER DEVELOPING. WILL KEEP POPS IN UNTIL SIGNIFICANT DRYING OCCURS
OVER AREA. THREAT OF SEVERE WEATHER EXISTS UNTIL UPPER LEVEL DYNAMICS
MOVES EAST OF AREA. ETA MODEL INDICATES ANOTHER VORT MAX ROTATING
AROUND BASE OF TROUGH INTO CWA WHICH WILL LIKELY AID CONTINUED
DEVELOPMENT ALONG DRYLINE. THE RUC MODEL INDICATES STRONG 500 MB
VORT LOBE WILL WORK INTO AREA IN THE NEXT FEW HOURS.

MOST ACTIVITY SHOULD END BEFORE MIDNIGHT ACROSS THE WESTERN PART OF
THE AREA BUT WILL LINGER INTO THE NIGHT ACROSS THE EAST. RAPID
DRYING TAKES PLACE AS WINDS SHIFT TO THE NORTHWEST WITH THE COOL
FRONT WHICH MOVES THROUGH MOST OF THE AREA LATE TONIGHT.

THE START OF THE NEW WEEK SHOULD USHER IN DRIER AIR WITH
TEMPERATURES NEAR SEASONAL NORMALS OF LOWER 80S. WILL KEEP COASTAL
ADVISORY UP THROUGH THE NIGHT AS WINDS STAY UP.

MOS TEMPS LOOK REASONABLE SO WILL ONLY MAKE MINOR ADJUSTMENTS.

.LCH...SMALL CRAFT ADVISORY ATCHAFALAYA RIVER LA TO HIGH ISLAND TX
LA...SMALL CRAFT ADVISORY GMZ450-455-470-475
TX...SMALL CRAFT ADVISORY GMZ450-470

PRELIMINARY NUMBERS...
LCH 62/85/57/85 3000
LFT 61/84/57/81 3000
AEX 61/80/55/79 3000
BPT 62/87/59/84 3000

In the hours before

Local storm report, Apr 23, 9:37 AM CDT, 5 hours 45 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, 5 hours 37 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, 2 hours 48 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, 2:06 PM CDT	Severe Thunderstorm Warning	LCH	Vermilion	54 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; the sounding from the Mesonet's radiosonde archive.