Alert archive / Louisiana / Flash Flood Warnings in 1995

Flash Flood Warning 11, NWS New Orleans, LA

April 11, 1995East Feliciana Parish, Pointe Coupee Parish, West Baton Rouge Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Apr 11, 1995, 8:25 AM CDT for East Feliciana Parish, Pointe Coupee Parish, West Baton Rouge Parish, Louisiana. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Apr 11, 1995, 8:25 AM CDT (13:25 UTC)
Expired
Apr 11, 1995, 12:00 PM CDT
In force
4 hr
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties East Feliciana Parish, LA, Pointe Coupee Parish, LA, West Baton Rouge Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.4 hours before the alert went out and 162 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 1995-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 546 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 1995-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 300 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
546 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
561 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
300 m²/s²
0-3 km storm-relative helicity
454 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 111322
FFWNEW
MSC005-LAC033-037-077-121-111700-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED TO ADD EAST FELICIANA AND AMITE
NATIONAL WEATHER SERVICE NEW ORLEANS LA
825 AM CDT TUE APR 11 1995

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
FLASH FLOOD WARNING    EFFECTIVE UNTIL  1200 PM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...

IN SOUTHEAST LOUISIANA

   ...EAST BATON ROUGE PARISH...POINTE COUPEE PARISH
   ...WEST BATON ROUGE PARISH...EAST FELICIANA PARISH

IN SOUTH MISSISSIPPI

   ...AMITE COUNTY

AT 815 AM CDT NATIONAL WEATHER SERVICE RADAR AND PUBLIC REPORTS
INDICATE THAT THE HEAVY RAINS HAVE DIMINISHED. RAINFALL AMOUNTS HAVE
EXCEEDED 5 INCHES OVER THE AREAS RESULTING IN CONSIDERABLE FLOODING
OF LOW LYING AREAS AND STREETS.

ALTHOUGH THE HEAVY RAINFALL HAS ENDED ROADWAYS...UNDERPASSES AND LOW
LYING AREAS WILL REMAIM FLOODED FOR THE NEXT 3 TO 4 HOURS.  DRAINAGE
FROM THESE AREAS WILL FURTHER CONTRIBUTE TO KEEP STREAMS AND BAYOUS
UP TO THEIR BANKS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO 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.

In the hours before

Local storm report, Apr 11, 3:30 AM CDT, 4 hours 55 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
330 AM CDT TUE APR 11 1995

TIME CST      PARISH            EVENT

250 AM        WILKINSON         MISSISSIPPI HIGHWAY PATROL REPORTS NUMEROUS
               COUNTY MS        TREES DOWN ALONG HWY 24 AND 61 NORTH
Local storm report, Apr 11, 3:31 AM CDT, 4 hours 54 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
330 AM CDT TUE APR 11 1995

TIME CST      PARISH            EVENT

250 AM        WILKINSON         MISSISSIPPI HIGHWAY PATROL REPORTS NUMEROUS
n               COUNTY MS        TREES DOWN ALONG HWY 24 AND 61 NORTH

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 10, 7:30 PM CDTSevere Thunderstorm WarningLIXAscension, Saint James, Saint John the Baptist45 min
Apr 10, 7:30 PM CDTSevere Thunderstorm WarningLIXTangipahoa45 min
Apr 10, 8:07 PM CDTSevere Thunderstorm WarningLIXJefferson, Lafourche, Saint Charles53 min
Apr 10, 8:24 PM CDTSevere Thunderstorm WarningLIXOrleans, Plaquemines, Saint Bernard51 min
Apr 10, 8:31 PM CDTSevere Thunderstorm WarningLIXSaint Tammany44 min
Apr 10, 10:05 PM CDTSevere Thunderstorm WarningLIXSaint Landry60 min
Apr 11, 12:45 AM CDTSevere Thunderstorm WarningLIXAvoyelles60 min
Apr 11, 2:09 AM CDTSevere Thunderstorm WarningLIXPointe Coupee, West Feliciana66 min
Apr 11, 2:56 AM CDTTornado WarningLIXEast Feliciana, West Feliciana64 min
Apr 11, 4:01 AM CDTTornado WarningLIXEast Baton Rouge, East Feliciana, West Baton Rouge59 min
Apr 11, 4:16 AM CDTFlash Flood WarningLIXEast Baton Rouge, Pointe Coupee, West Baton Rouge4 hr
Apr 11, 4:24 AM CDTTornado WarningLIXLivingston, Saint Helena66 min
Apr 11, 4:25 AM CDTFlash Flood WarningLIXEast Feliciana4 hr
Apr 11, 4:25 AM CDTFlash Flood WarningLIXEast Baton Rouge, Pointe Coupee, West Baton Rouge4 hr
Apr 11, 4:46 AM CDTTornado WarningLIXTangipahoa59 min
Apr 11, 5:10 AM CDTSevere Thunderstorm WarningLIXWashington65 min
Apr 11, 5:10 AM CDTSevere Thunderstorm WarningLIXSaint Tammany65 min
Apr 11, 5:22 AM CDTFlash Flood WarningLIXEast Feliciana2 hr
Apr 11, 5:34 AM CDTSevere Thunderstorm WarningLIXLivingston, Tangipahoa56 min
Apr 11, 5:44 AM CDTFlash Flood WarningLIXLivingston, Saint Helena, Tangipahoa4 hr
Apr 11, 6:09 AM CDTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa66 min
Apr 11, 6:31 AM CDTSevere Thunderstorm WarningLIXSaint Tammany59 min
Apr 11, 7:04 AM CDTFlash Flood WarningLIXAscension3 hr
Apr 11, 7:39 AM CDTFlash Flood WarningLIXAscension2 hr
Apr 11, 8:14 AM CDTFlash Flood WarningLIXSaint Tammany, Tangipahoa, Washington2 hr
Apr 11, 8:25 AM CDTFlash Flood WarningLIXEast Baton Rouge4 hr
Apr 11, 10:03 AM CDTFlash Flood WarningLIXOrleans, Saint Bernard, Saint Tammany117 min

Nearby

Flash Flood Warnings in Louisiana, 1995Every flash flood warning in 1995

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.