Alert archive / Louisiana / Flash Flood Warnings in 1995

Flash Flood Warning 10, NWS New Orleans, LA

April 11, 1995Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Apr 11, 1995, 8:14 AM CDT for Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Apr 11, 1995, 8:14 AM CDT (13:14 UTC)
Expired: Apr 11, 1995, 10:15 AM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.2 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 111315
FFWNEW
LAC103-105-117-111515-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
814 AM CDT TUE APR 11 1995
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
FLASH FLOOD WARNING    EFFECTIVE UNTIL 1015 AM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...ST.TAMMANY PARISH...SOUTHERN TANGIPAHOA PARISH
   ...WASHINGTON PARISH
 
AT 800 AM NATIONAL WEATHER SERVICE RADAR INDICATED HEAVY RAINFALL
CONTINUES OVER THE PARISHES NORTH OF LAKE PONTCHARTRAIN WITH 3 TO 5
INCHES RAINFALL ON THE GROUND. AN ADDITIONAL 1 TO 2 INCHES OF RAINFALL
IS LIKELY IN THIS AREA IN THE NEXT 2 HOURS.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.  CAMPERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

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 44 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 43 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.

Issued	Product	Office	Counties	Lasted
Apr 10, 7:30 PM CDT	Severe Thunderstorm Warning	LIX	Ascension, Saint James, Saint John the Baptist	45 min
Apr 10, 7:30 PM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa	45 min
Apr 10, 8:07 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Saint Charles	53 min
Apr 10, 8:24 PM CDT	Severe Thunderstorm Warning	LIX	Orleans, Plaquemines, Saint Bernard	51 min
Apr 10, 8:31 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	44 min
Apr 10, 10:05 PM CDT	Severe Thunderstorm Warning	LIX	Saint Landry	60 min
Apr 11, 12:45 AM CDT	Severe Thunderstorm Warning	LIX	Avoyelles	60 min
Apr 11, 2:09 AM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	66 min
Apr 11, 2:56 AM CDT	Tornado Warning	LIX	East Feliciana, West Feliciana	64 min
Apr 11, 4:01 AM CDT	Tornado Warning	LIX	East Baton Rouge, East Feliciana, West Baton Rouge	59 min
Apr 11, 4:16 AM CDT	Flash Flood Warning	LIX	East Baton Rouge, Pointe Coupee, West Baton Rouge	4 hr
Apr 11, 4:24 AM CDT	Tornado Warning	LIX	Livingston, Saint Helena	66 min
Apr 11, 4:25 AM CDT	Flash Flood Warning	LIX	East Feliciana	4 hr
Apr 11, 4:25 AM CDT	Flash Flood Warning	LIX	East Baton Rouge, Pointe Coupee, West Baton Rouge	4 hr
Apr 11, 4:46 AM CDT	Tornado Warning	LIX	Tangipahoa	59 min
Apr 11, 5:10 AM CDT	Severe Thunderstorm Warning	LIX	Washington	65 min
Apr 11, 5:10 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	65 min
Apr 11, 5:22 AM CDT	Flash Flood Warning	LIX	East Feliciana	2 hr
Apr 11, 5:34 AM CDT	Severe Thunderstorm Warning	LIX	Livingston, Tangipahoa	56 min
Apr 11, 5:44 AM CDT	Flash Flood Warning	LIX	Livingston, Saint Helena, Tangipahoa	4 hr
Apr 11, 6:09 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa	66 min
Apr 11, 6:31 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	59 min
Apr 11, 7:04 AM CDT	Flash Flood Warning	LIX	Ascension	3 hr
Apr 11, 7:39 AM CDT	Flash Flood Warning	LIX	Ascension	2 hr
Apr 11, 8:25 AM CDT	Flash Flood Warning	LIX	East Feliciana, Pointe Coupee, West Baton Rouge	4 hr
Apr 11, 8:25 AM CDT	Flash Flood Warning	LIX	East Baton Rouge	4 hr
Apr 11, 10:03 AM CDT	Flash Flood Warning	LIX	Orleans, Saint Bernard, Saint Tammany	117 min

Nearby

Flash Flood Warnings in Louisiana, 1995 Every 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.