Alert archive / Louisiana / Flash Flood Warnings in 1999

Flash Flood Warning 21, NWS Lake Charles, LA

April 4, 1999Rapides Parish, Vernon Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Apr 4, 1999, 1:23 AM CST for Rapides Parish, Vernon Parish, Louisiana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 4, 1999, 1:23 AM CST (07:23 UTC)
Expired
Apr 4, 1999, 5:30 AM CDT
In force
3 hr
Issued by
NWS Lake Charles, LA
Area
Whole counties

Counties Rapides Parish, LA, Vernon Parish, LA

The radar

The Ft Polk radar (KPOE), 11 km from the middle of the area, began a volume at 07:23 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.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 7.4 hours before the alert went out and 119 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, Lake Charles Mun, LA at 00:00Z on 1999-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 728 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, Lake Charles Mun, LA at 00:00Z on 1999-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 square meters per square second.19395878Sfc1 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
728 J/kg
Mixed-layer CIN
-290 J/kg
Mixed-layer LCL
1318 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.6

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Apr 3, 7:25 PM CST, 5 hours 58 minutes earlier.

Area forecast discussion, Apr 3, 7:25 PM CST, 5 hours 58 minutes before
SOUTHWEST...CENTRAL LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
725 PM CST SAT APR 3 1999

SQUALL LINE IS EXTENDING FROM 30 W KMLU TO NORTHERN LIBERTY COUNTY
TEXAS ATTM. SHORT TERM CONCERN IS TRAINING ECHOES ACROSS INTERIOR
SE TX. ISSUED A FFW FOR NORTHERN TYLER AS 88D ESTIMATES/REPORTS OF FOUR
INCHES OF RAIN DURING HAVE FALLEN DURING LAST TWO HRS. THIS BACKBUILDING
AREA SEEMS TO CORRELATE WELL WITH THICKNESS DIFFULENCE ETA
ADVERTISES FOR 18-00Z. WILL BUMP POPS UP TO 80 FOR INTERIOR SE TX
AND INCLUDE HEAVY RAINFALL PSBL 1ST PERIOD IN WRKLC1 TO REFLECT SLOW
MVMT OF LINE. FOR COASTAL SE TX/SW LA...WIDELY SCT SHWRS/TSTMS AT
BEST CURRENTLY AS 00Z LCH SOUNDING SHOWS GOOD INSTABILITY WITH CAPE
OF 2565 J/KG BUT STILL CAPPED WITH CIN OF 175 J/KG. WILL LEAVE POPS
ALONE FOR NOW AS LINE MOVES VERY SLOWLY SOUTHWARD. WILL KEEP TEMPS
AS IS.

18

LCH WW 069/076/067/078 067 6534
LFT EW 069/077/066/079 067 4534
AEX TW 066/077/066/080 065 6534
BPT WW 069/077/068/079 067 5534

In the hours before

Special weather statement, Apr 3, 9:02 PM CST, 4 hours 21 minutes before
LAZ027>031-041-042-051-TXZ180>182-201-215-216-040400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
902 PM CST SAT APR 3 1999

...TORNADO WATCH HAS EXPIRED FOR MUCH OF CENTRAL AND WESTERN
LOUISIANA AND SOUTHEAST TEXAS...
...SEVERE THUNDERSTORM WATCH IN EFFECT FOR AVOYELLES PARISH
UNTIL MIDNIGHT...

THE TORNADO WATCH THAT WAS ISSUED EARLIER THIS AFTERNOON
FOR SOUTHEAST TEXAS AND MUCH OF WESTERN AND CENTRAL LOUISIANA
HAS EXPIRED. HOWEVER...A NEW SEVERE THUNDERSTORM WATCH IS NOW
IN EFFECT FOR AVOYELLES PARISH IN CENTRAL LOUISIANA UNTIL MIDNIGHT.

STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS
NORTHERN SECTIONS OF SOUTHEAST TEXAS...WESTERN LOUISIANA AND
CENTRAL LOUISIANA THIS EVENING AS A STRONG UPPER LEVEL DISTURBANCE
MOVES ACROSS THE AREA.

HEAVY RAIN WILL ALSO BE A MAJOR CONCERN WITH THESE THUNDERSTORMS.
3 TO 6 INCHES OF RAIN HAS FALLEN ACROSS NORTHERN SECTIONS OF
SOUTHEAST TEXAS SINCE THIS AFTERNOON CAUSING FLOODING OF LOW
LYING AREAS AND SECONDARY ROADS IN NORTHERN TYLER COUNTY. AN
ADDITIONAL 2 TO 4 INCHES OF RAIN WILL BE POSSIBLE TONIGHT
ACROSS SOUTHEAST TEXAS...CENTRAL AND WESTERN LOUISIANA. THIS
MAY CAUSE ADDITIONAL FLOODING ACROSS THE AREA.

STAY TUNED TO NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
Special weather statement, Apr 3, 9:02 PM CST, 4 hours 21 minutes before
LAZ027>031-041-042-051-TXZ180>182-201-215-216-040400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
902 PM CST SAT APR 3 1999

...TORNADO WATCH HAS EXPIRED FOR MUCH OF CENTRAL AND WESTERN
LOUISIANA AND SOUTHEAST TEXAS...
...SEVERE THUNDERSTORM WATCH IN EFFECT FOR AVOYELLES PARISH
UNTIL MIDNIGHT...

THE TORNADO WATCH THAT WAS ISSUED EARLIER THIS AFTERNOON
FOR SOUTHEAST TEXAS AND MUCH OF WESTERN AND CENTRAL LOUISIANA
HAS EXPIRED. HOWEVER...A NEW SEVERE THUNDERSTORM WATCH IS NOW
IN EFFECT FOR AVOYELLES PARISH IN CENTRAL LOUISIANA UNTIL MIDNIGHT.

STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS
NORTHERN SECTIONS OF SOUTHEAST TEXAS...WESTERN LOUISIANA AND
CENTRAL LOUISIANA THIS EVENING AS A STRONG UPPER LEVEL DISTURBANCE
MOVES ACROSS THE AREA.

HEAVY RAIN WILL ALSO BE A MAJOR CONCERN WITH THESE THUNDERSTORMS.
3 TO 6 INCHES OF RAIN HAS FALLEN ACROSS NORTHERN SECTIONS OF
SOUTHEAST TEXAS SINCE THIS AFTERNOON CAUSING FLOODING OF LOW
LYING AREAS AND SECONDARY ROADS IN NORTHERN TYLER COUNTY. AN
ADDITIONAL 2 TO 4 INCHES OF RAIN WILL BE POSSIBLE TONIGHT
ACROSS SOUTHEAST TEXAS...CENTRAL AND WESTERN LOUISIANA. THIS
MAY CAUSE ADDITIONAL FLOODING ACROSS THE AREA.

STAY TUNED TO NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 4, 1:23 AM CSTFlash Flood WarningLCHBeauregard3 hr
Apr 4, 4:40 AM CDTSevere Thunderstorm WarningLCHRapides65 min
Apr 4, 7:58 AM CDTFlash Flood WarningLCHAllen, Beauregard, Rapides, Vernon2 hr
Apr 4, 7:58 AM CDTFlash Flood WarningLCHAvoyelles, Evangeline2 hr
Apr 4, 10:30 AM CDTFlash Flood WarningLCHBeauregard4 hr
Apr 4, 3:59 PM CDTSevere Thunderstorm WarningLCHVernon61 min
Apr 4, 4:05 PM CDTTornado WarningLCHVernon55 min
Apr 4, 5:38 PM CDTSevere Thunderstorm WarningLCHRapides47 min

Nearby

Flash Flood Warnings in Louisiana, 1999Every flash flood warning in 1999

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; radar from the NEXRAD Level II archive.