Alert archive / Louisiana / Flash Flood Warnings in 1998

Flash Flood Warning 20, NWS Lake Charles, LA

January 6, 1998Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Jan 6, 1998, 6:55 PM CST for Iberia Parish, Saint Martin Parish, St. Mary 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
Jan 6, 1998, 6:55 PM CST (00:55 UTC)
Expired
Jan 6, 1998, 9:30 PM CST
In force
3 hr
Issued by
NWS Lake Charles, LA
Area
Whole counties

Counties Iberia Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.9 hours before the alert went out and 156 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 1998-01-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 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 1998-01-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 296 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
496 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
296 m²/s²
0-3 km storm-relative helicity
459 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 
TTAA00 KLCH 070051
FFWLCH
LAC045-099-101-070330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
655 PM CST TUE JAN 6 1998

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES LA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 930 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTH CENTRAL LOUISIANA

   ...IBERIA PARISH
   ...UPPER ST. MARTIN PARISH
   ...LOWER ST. MARTIN PARISH
   ...ST. MARY PARISH

AT 650 PM THE LAKE CHARLES DOPPLER RADAR SHOWED STRONG
THUNDERSTORMS MOVING OUT OF THE GULF INTO THE WARNED AREA. RADAR
ESTIMATES UP TO 2 INCHES OF RAIN AN HOUR CAN BE EXPECTED ACROSS THE
ALREADY SATURATED GROUND. SHOWERS AND THUNDERSTORMS WERE MOVING
NORTHEAST AT
 30 MPH.


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

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 6, 3:23 PM CST, 3 hours 32 minutes earlier.

Area forecast discussion, Jan 6, 3:23 PM CST, 3 hours 32 minutes before
SOUTHEAST TEXAS..SOUTHWEST AND CENTRAL LOUISIANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
323 PM CST TUE JAN 6 1998   ...REXMITTED...

ITS GOING TO BE A MESS TONITE. DEEP MSTR CONTINUES TO STREAM IN
AS H5 LO TRACKS SLOLY E OUT OF NM. THROW IN A COUPLE OF UPR LVL
JETS AND VARIOUS SFC BOUNDARIES...AND SHUD END UP WITH SOME MAJOR
FLOODING BEFORE THE NIGHT IS OVER. SEVERAL FFWS HAVE BEEN ISSUED
AND FFA REMAINS NECESSARY FOR ENTIRE FA INTO TMRW. SHUD BEGIN TO
SEE A BRK FRM THE HEAVIEST RAIN WED MORN AS SFC FRNT MOVES THRU
AND DRIER AIR BEGINS TO FILTER IN...THO SW FLO ALOFT CONTINUES AND
CLOUDY SKIES AND RAINFALL SHUD LINGER. TEMP TREND OF FWC SEEMS
FAIRLY REASONABLE. 8

BPT 61/64/44/51 +741
LCH 61/64/44/51 +741  LFT 61/65/45/52 +741  AEX 61/64/43/51 +741

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 6, 6:00 PM CSTFlash Flood WarningLCHCalcasieu, Cameron, Jefferson Davis, Vermilion4 hr
Jan 6, 6:00 PM CSTFlash Flood WarningLCHAcadia, Allen, Avoyelles, Evangeline, Rapides, Saint Landry4 hr
Jan 6, 6:00 PM CSTFlash Flood WarningLCHBeauregard, Vernon4 hr
Jan 6, 6:00 PM CSTFlash Flood WarningLCHLafayette4 hr
Jan 6, 10:00 PM CSTFlash Flood WarningLCHAllen, Avoyelles, Evangeline, Rapides, Vernon4 hr
Jan 6, 10:00 PM CSTFlash Flood WarningLCHBeauregard, Calcasieu, Cameron, Jefferson Davis4 hr
Jan 6, 10:00 PM CSTFlash Flood WarningLCHAcadia, Iberia, Lafayette, Vermilion4 hr
Jan 6, 10:00 PM CSTFlash Flood WarningLCHSaint Landry, Saint Martin4 hr
Jan 6, 10:00 PM CSTFlash Flood WarningLCHSt. Mary4 hr

Nearby

Flash Flood Warnings in Louisiana, 1998Every flash flood warning in 1998

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.