Alert archive / Louisiana / Flash Flood Warnings in 2002

Flash Flood Warning 25, NWS New Orleans, LA

September 26, 2002Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Sep 26, 2002, 3:08 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 4 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
Sep 26, 2002, 3:08 PM CDT (20:08 UTC)
Expired
Sep 26, 2002, 7:00 PM CDT
In force
4 hr
Issued by
NWS New Orleans, LA
Area
Whole counties

County Saint Tammany Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.1 hours before the alert went out and 30 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 2002-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2002-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.193958Sfc1 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
941 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
42 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 
WGUS54 KLIX 262008
FFWNEW
LAC103-270000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
305 PM CDT THU SEP 26 2002

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLOOD WARNING FOR...
  ST. TAMMANY PARISH
  THIS INCLUDES THE CITY OF SLIDELL AND EDEN ISLE

* UNTIL 700 PM CDT

* AT 300 PM CDT...LOCAL TIDAL SURGE FLOODING IS STILL AFFECTING 
  THE NORTHSHORE COMMUNITY AND THE SOUTHERN PORTIONS OF SLIDELL 
  ALONG HIGHWAY 11. WATERS WILL SLOWLY RECEDE THROUGHOUT THE 
  AFTERNOON WITH CONDITIONS RETURNING TO NORMAL AFTER 7 PM.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE TO HIGHER
GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 25, 8:59 PM CDTFlash Flood WarningLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles6 hr
Sep 25, 11:41 PM CDTTornado WarningLIXJefferson, Lafourche109 min
Sep 25, 11:41 PM CDTTornado WarningLIXLafourche34 min
Sep 26, 12:20 AM CDTTornado WarningLIXTerrebonne40 min
Sep 26, 12:20 AM CDTTornado WarningLIXLafourche40 min
Sep 26, 1:06 AM CDTTornado WarningLIXLafourche24 min
Sep 26, 1:06 AM CDTTornado WarningLIXTerrebonne24 min
Sep 26, 1:35 AM CDTTornado WarningLIXTerrebonne7 days
Sep 26, 2:21 AM CDTTornado WarningLIXTerrebonne39 min
Sep 26, 3:22 AM CDTFlash Flood WarningLIXAssumption, Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard and 4 more4 hr
Sep 26, 7:41 AM CDTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard3 hr
Sep 26, 8:24 AM CDTFlash Flood WarningLIXSaint Tammany3 hr
Sep 26, 10:56 AM CDTFlash Flood WarningLIXJefferson, Plaquemines, Saint Bernard2 hr
Sep 26, 11:52 AM CDTFlash Flood WarningLIXSaint Tammany3 hr
Sep 26, 1:30 PM CDTFlash Flood WarningLIXJefferson3 hr
Sep 26, 2:26 PM CDTFlash Flood WarningLIXSaint John the Baptist, Tangipahoa4 hr
Sep 26, 6:01 PM CDTFlash Flood WarningLIXLivingston, Saint John the Baptist, Saint Tammany, Tangipahoa6 hr

Nearby

Flash Flood Warnings in Louisiana, 2002Every flash flood warning in 2002

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.