Alert archive / Louisiana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 107, NWS Lake Charles, LA

August 5, 2001St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Aug 5, 2001, 5:24 PM CDT for St. Mary Parish, Louisiana. It was in force for 36 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 5, 2001, 5:24 PM CDT (22:24 UTC)
Expired
Aug 5, 2001, 6:00 PM CDT
In force
36 min
Issued by
NWS Lake Charles, LA
Area
Whole counties; the outline is the Mesonet’s reconstruction

County St. Mary Parish, LA

What was reported inside it

TimeReportWhereRemark
Aug 5, 5:30 PM CDTThunderstorm WindMorgan City, 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.4 hours before the alert went out and 161 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, Slidell Radar S, LA at 12:00Z on 2001-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 832 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, Slidell Radar S, LA at 12:00Z on 2001-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 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
832 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
997 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
4 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 052225
SVRLCH

LAC101-052300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
524 PM CDT SUN AUG 5 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 600 PM CDT

* AT 516 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 2 MILES SOUTHEAST OF MORGAN CITY...NEARLY STATIONARY.

* THIS STORM WILL BE NEAR...
  MORGAN CITY BY 550 PM CDT
  BERWICK...BAYOU VISTA...PATTERSON BY 600 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 2970 9112 2975 9123 2966 9142 2956 9126

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 Aug 5, 2:22 PM CDT, 3 hours 2 minutes earlier.

Area forecast discussion, Aug 5, 2:22 PM CDT, 3 hours 2 minutes before
SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
222 PM CDT SUN AUG 5 2001

.TONITE...
THE CRCLN ASSOCD WITH BARRY WILL MAINTAIN EVENING SHWRS ACRS SWRN
LOUISIANA. HWVR...THE NOCTURNAL SINKING AIR SHUD EXTINGUISH MOSTOF
THE SHWRS BEFORE MIDNIGHT. XPC OVERNITE MINIMUMS TO BE NEAR NORMAL.
THE ATYPICAL NLY WINDS WILL KEEP THE NEAR SFC AIR CONTINENTAL...THE
CSTL BACLIN ZONE WILL BE RATHER WEEK.

.MON...
BARRY SIDESTEPS TO THE WEST INTO SWRN ALABAMA. CLOUDS INCREASE AS
MSTR FROM THE NORTH STREAMS SWD...OVERRIDING THE FILM OF CONTINENTAL
AIR. THE CLOUD COVER SHUD TEMPER THE AFTN MAXIMUMS.

.MON NITE THRU TUE NITE...
BARRY CONTS ITS NWD TREK. CLOUDS WILL LINGER ARND. XPC SHWRS TO END
IN THE EVENING HOURS...BUT RETURN ONCE AGAIN DURG THE AFTN HOURS.

.LCH...NONE

.PRELIMINARY NUMBERS...
AEX 73/90/74/90/73 25252
BPT 75/93/75/91/75 13131
LCH 74/93/75/90/75 242424
LFT 75/91/75/90/75 24242

TRARES

Nearby

Severe Thunderstorm Warnings in Louisiana, 2001Every severe thunderstorm warning in 2001

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.