Alert archive / Louisiana / Flash Flood Warnings in 1999

Flash Flood Warning 4, NWS Lake Charles, LA

January 7, 1999Acadia Parish, Jefferson Davis Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Jan 7, 1999, 11:04 AM CST for Acadia Parish, Jefferson Davis Parish, Louisiana. It was in force for 2 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
Jan 7, 1999, 11:04 AM CST (17:04 UTC)
Expired
Jan 7, 1999, 1:15 PM CST
In force
2 hr
Issued by
NWS Lake Charles, LA
Area
Whole counties

Counties Acadia Parish, LA, Jefferson Davis Parish, LA

The radar

The Lake Charles radar (KLCH), 60 km from the middle of the area, began a volume at 17:07 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 12:00Z, 5.1 hours before the alert went out and 59 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 12:00Z on 1999-01-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 45 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 12:00Z on 1999-01-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 163 square meters per square second.1939587897Sfc1 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
45 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
497 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
163 m²/s²
0-3 km storm-relative helicity
287 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLCH 071705
FFWLCH
LAC001-053-071915-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1104 AM CST THU JAN 7 1999

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ACADIA PARISH IN SOUTHWESTERN LOUISIANA
  JEFFERSON DAVIS PARISH IN SOUTHWESTERN LOUISIANA

* UNTIL 115 PM CST

* AT 1050 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED THAT
4 TO 8 INCHES OF RAIN HAVE FALLEN ACROSS NORTHERN SECTIONS OF
ACADIA AND JEFFERSON DAVIS PARISHES...MAINLY ALONG AND NORTH OF I-10
CORRIDOR...SINCE WEDNESDAY NIGHT. 1 TO 2 INCHES OF ADDITIONAL
RAINFALL ARE EXPECTED ACROSS THE AREA THROUGH THIS EVENING.

*JEFFERSON DAVIS SHERRIFS OFFICE REPORTED HIGHWAY 26 FLOODED FROM
JUST NORTH OF JENNINGS TO ELTON. HIGHWAY 99 WAS REPORTED FLOODED
2 MILES NORTH OF WELSH. EMERGENCY MANAGEMENT PERSONNEL IN ACADIA
PARISH REPORTED FLOODING ALONG SECTIONS OF LOURDES ROAD IN CHURCH
POINT AND ALBERT VENABLE ROAD IN BRANCH.

HEAVY RAINS FLOOD ROADS AND LOW LYING AREAS RAPIDLY...SO DO NOT
DRIVE YOUR VEHICLE INTO AREAS WHERE WATER OF AN UNKNOWN DEPTH
COVERS THE ROAD. IF YOUR VEHICLE STALLS...ABANDON IT IMMEDIATELY
AND SEEK HIGHER GROUND.

STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA FOR FURTHER
UPDATES ON THIS LIFE THREATENING FLOOD EVENT.

&

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 Jan 7, 8:35 AM CST, 2 hours 29 minutes earlier.

Area forecast discussion, Jan 7, 8:35 AM CST, 2 hours 29 minutes before
SOUTHWEST...CENTRAL LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
835 AM CST THU JAN 7 1999

CURRENT SFC MAP SHOWS WARM FRONT IN NORTHERN LA WITH HEAVY TO
TORRENTIAL RAINFALL CENTERED ALONG THE I-10 CORRIDOR OVERNIGHT WITH
12-HOUR TOTALS OF 4-6 OVER A LARGE AREA. THE HEAVIEST BAND OF RAIN IS
MOVING SLOWLY NORTHWARD...BUT WITH 1-HOUR PCPN AMOUNTS OF 0.75 -
1.00 AND SATURATED GROUND...RIVER/FLASH FLOODING BEGINNING TO OCCUR.
ADDITIONAL RAINFALL OF 2-4 IS PSBL ALONG AND NORTH OF I-10. COORD WITH
NEW CONCERNING FLOOD WATCH. WILL INCREASE POPS FOR LCH AND LFT TO 70
1ST PERIOD. WILL TEMPS ALONE FOR NOW

18

LCH CE 070/060 072/056 056 743
LFT CE 070/060 073/057 057 743
AEX CE 064/059 070/053 053 543
BPT CE 070/060 070/055 055 543

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 7, 8:03 AM CSTFlash Flood WarningLCHAcadia3 hr
Jan 7, 10:20 AM CSTFlash Flood WarningLCHEvangeline, Saint Landry3 hr
Jan 7, 10:20 AM CSTFlash Flood WarningLCHLafayette, Saint Martin3 hr
Jan 7, 1:30 PM CSTFlash Flood WarningLCHAcadia, Evangeline, Jefferson Davis3 hr
Jan 7, 1:30 PM CSTFlash Flood WarningLCHLafayette, Saint Landry, Saint Martin3 hr
Jan 7, 3:23 PM CSTSevere Thunderstorm WarningLCHVernon47 min
Jan 7, 4:23 PM CSTTornado WarningLCHRapides, Vernon32 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.