Alert archive / Louisiana / Flash Flood Warnings in 1997

Flash Flood Warning 23, NWS New Orleans, LA

July 9, 1997Iberville Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jul 9, 1997, 2:05 PM CDT for Iberville Parish, Louisiana. It was in force for 115 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 9, 1997, 2:05 PM CDT (19:05 UTC)
Expired
Jul 9, 1997, 4:00 PM CDT
In force
115 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Iberville Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.1 hours before the alert went out and 158 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 1997-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 482 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 1997-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
482 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
889 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
74 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 KNEW 091906
FFWNEW
LAC047-092100-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
205 PM CDT WED JUL 9 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
FLASH FLOOD WARNING  EFFECTIVE UNTIL  400 PM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST LOUISIANA
 
   ...IBERVILLE PARISH
 
AT 2:00 PM...NATIONAL WEATHER SERVICE RADAR INDICATED STRONG
THUNDERSTORMS PRODUCING TORRENTIAL RAINFALL ACROSS IBERVILLE PARISH.
IBERVILLE PARISH SHERIFFS OFFICE REPORTED PORTIONS OF LA HWY 1 AND LA
HWY 75 CLOSED DUE TO WATER ON THE ROADWAY. RADAR ESTIMATES HOURLY
RAINFALL RATES BETWEEN 2 AND 3 INCHES. ADDITIONAL RAINFALL CAN BE
EXPECTED AS THUNDERSTORMS MOVE OVER THE SAME AREA. EXPECT AN ADDITIONAL
SEVERAL INCHES.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHO:ULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
 
 
&

Nearby

Flash Flood Warnings in Louisiana, 1997Every flash flood warning in 1997

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.