Alert archive / Louisiana / Flash Flood Warnings in 2002

Flash Flood Warning 8, NWS New Orleans, LA

August 6, 2002Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Aug 6, 2002, 9:36 AM CDT for Saint Tammany Parish, Louisiana. It was in force for 114 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: Aug 6, 2002, 9:36 AM CDT (14:36 UTC)
Expired: Aug 6, 2002, 11:30 AM CDT
In force: 114 min
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, 2.6 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-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: 1356 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 449 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

000 
WHUS54 KLIX 061436 CCA
FFWNEW
LAC103-061630-

BULLETIN - EAS ACTIVATION REQUESTED ... CORRECTION
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
935 AM CDT TUE AUG 6 2002

CORRECTION FOR WARNING HEADER WHICH SHOULD BE NEWFFWNEW NOT NEWSMWNEW

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ST. TAMMANY PARISH IN SOUTHEAST LOUISIANA

* UNTIL 1130 AM CDT

* AT 912 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY 
RAIN CONTINUING OVER MAINLY THE NORTHERN AND CENTRAL SECTIONS OF ST. 
TAMMANY PARISH. THE CONTINUED DEVELOPMENT OF SHOWERS AND  
THUNDERSTORMS OVER THE SAME AREA THAT RECEIVED LOCALLY HEAVY RAIN 
LATE LAST NIGHT AND EARLIER THIS MORNING SUGGESTS A HIGH THREAT OF 
FLOODING IN SOME SECTIONS.  GREATEST THREAT OF SIGNIFICANT RAIN IN 
THE NEXT TWO HOURS IS FROM JUST NORTH OF SLIDELL TO SUN AND BUSH AND 
AREAS FROM COVINGTON NORTHWARD.  

ST TAMMANY PARISH OFFICE OF EMERGENCY PREPAREDNESS DIRECTOR REPORTED 
ROADS WERE FLOODED IN THE FOLSOM AREA. WATER IS GETTING CLOSE TO 
OVER TOPPING A BOGUE FALAYA RIVER BRIDGE JUST EAST OF FOLSOM AT 930 
AM. 

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.

EXPECTED FLOODING OF RIVERS WILL BE COVERED UNDER A SEPARATE 
BULLETIN.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCAND HAVE THEM 
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.

Issued	Product	Office	Counties	Lasted
Aug 6, 4:29 AM CDT	Flash Flood Warning	LIX	Saint Tammany, Washington	2 hr
Aug 6, 5:30 AM CDT	Tornado Warning	LIX	Saint Tammany	30 min
Aug 6, 6:30 AM CDT	Flash Flood Warning	LIX	Saint Tammany	2 hr
Aug 6, 6:31 AM CDT	Flash Flood Warning	LIX	Saint Tammany	119 min
Aug 6, 1:31 PM CDT	Flash Flood Warning	LIX	East Feliciana, Saint Helena	119 min

Nearby

Flash Flood Warnings in Louisiana, 2002 Every 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.