Alert archive / Louisiana / Flash Flood Warnings in 1995

Flash Flood Warning 37, NWS New Orleans, LA

May 10, 1995Ascension Parish, Livingston Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at May 10, 1995, 1:12 AM CDT for Ascension Parish, Livingston Parish, Louisiana. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: May 10, 1995, 1:12 AM CDT (06:12 UTC)
Expired: May 10, 1995, 3:15 AM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Ascension Parish, LA, Livingston Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 6.2 hours before the alert went out and 108 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: 3211 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 896 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 100615
FFWNEW
LAC005-063-100815-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
112 AM CDT WED MAY 10 1995
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
FLASH FLOOD WARNING    EFFECTIVE UNTIL  315 AM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...ASCENSION PARISH...SOUTHERN LIVINGSTON PARISH
 
NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SCATTERED
THUNDERSTORMS...WITH LOCALLY HEAVY RAINFALL...CONTINUE OVER
ASCENSION AND SOUHTERN LIVINGSTON PARISHES. THESE THUNDERSTORMS
WERE MOVING EAST-NORTHEAST AT 25 MILES PER HOUR. STORM COVERAGE
AND INTENSITY HAS DIMINISHED OVER THE PAST SEVERAL HOURS.
 
DOPPLER RADAR RAINFALL ESTIMATES AROUND THREE INCHES HAVE OCCURRED
OVER ASCENSION AND SOUTHERN LIVINGSTON PARISH DURING THE PAST
THREE HOURS. ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH ARE
POSSIBLE IN THE NEXT TWO HOURS.
 
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 SHOULD BE
ABANDONED QUICKLY.  MOVE 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, May 10, 1:12 AM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORTS
NATIONAL WEATHER SERVICE NEW ORLEANS LA
115 AM CDT WED MAY 10 1995

TIME(CDT)  .....CITY LOCATION...... STATE ...EVENT/REMARKS...
           ....COUNTY LOCATION......

7 PM          NEW ORLEANS            LA   4 CONFIRMED DEATHS DUE TO
5/8/95        ORLEANS                     FLOODING.  REPORTED BY
 TO                                       ORLEANS EOC
4 AM
5/9/95

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:47 PM CDT	Severe Thunderstorm Warning	LIX	St. Mary	58 min
May 9, 8:14 PM CDT	Severe Thunderstorm Warning	LIX	Washington	61 min
May 9, 8:16 PM CDT	Severe Thunderstorm Warning	LIX	Iberia, Saint Martin	59 min
May 9, 8:17 PM CDT	Severe Thunderstorm Warning	LIX	Iberville	58 min
May 9, 8:40 PM CDT	Severe Thunderstorm Warning	LIX	Ascension	65 min
May 9, 9:06 PM CDT	Severe Thunderstorm Warning	LIX	Livingston	54 min
May 9, 9:25 PM CDT	Severe Thunderstorm Warning	LIX	Orleans, Saint Tammany	65 min
May 9, 11:12 PM CDT	Tornado Warning	LIX	Orleans, Saint Tammany	63 min
May 10, 12:12 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, West Baton Rouge	63 min
May 10, 1:24 AM CDT	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa	3 hr
May 10, 2:22 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa	68 min
May 10, 4:26 AM CDT	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa	4 hr
May 10, 8:04 AM CDT	Severe Thunderstorm Warning	LIX	Orleans, Saint Bernard	56 min
May 10, 11:13 AM CDT	Severe Thunderstorm Warning	LIX	Plaquemines, Saint Bernard	62 min
May 10, 3:30 PM CDT	Tornado Warning	LIX	Avoyelles, Saint Landry	60 min
May 10, 3:53 PM CDT	Severe Thunderstorm Warning	LIX	Iberville, Saint Martin	67 min
May 10, 4:36 PM CDT	Severe Thunderstorm Warning	LIX	Saint Landry	69 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.