Alert archive / Louisiana / Flash Flood Warnings in 2002

Flash Flood Warning 7, NWS New Orleans, LA

August 6, 2002Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Aug 6, 2002, 6:31 AM CDT for Saint Tammany Parish, Louisiana. It was in force for 119 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, 6:31 AM CDT (11:31 UTC)
Expired: Aug 6, 2002, 8:30 AM CDT
In force: 119 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 00:00Z, 11.5 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: 1508 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KLIX 061131 CCA
FFWNEW
LAC103-061330-

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

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS REISSUED A

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

* UNTIL 830 AM CDT

* AT 622 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY 
  HEAVY RAIN 6 MILES EAST OF ABITA SPRINGS TO BUSH...MOVING NORTH AT 
  25 MPH. 

  ST. TAMMANY PARISH OFFICE OF EMERGENCY PREPAREDNESS REPORTED 
  FLOODING OF HIGHWAY 40 IN THE VICINITY OF BUSH. OTHER LOW LYING
  AREAS MAY ALSO BE EXPERIENCING FLOODING ALONG HIGHWAY 40 BETWEEN 
  FOLSOM AND BUSH.  AN OVERNIGHT RAINFALL REPORT OF 4.10 INCHES WAS 
  RECEIVED FROM THE TOWN OF SUN...BUT THE HEAVIEST RAINFALL OCCURRED 
  OVER FOLSOM AND BUSH SINCE MIDNIGHT.

  WASHINGTON PARISH OFFICIALS DID NOT REPORT ANY PROBLEMS WITH 
  FLOODING. THE FLASH FLOOD WARNING WAS NOT EXTENDED FOR WASHINGTON 
  PARISH...WHICH EXPIRED AT 630 AM CDT.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABONDONED. 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.

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, 9:36 AM CDT	Flash Flood Warning	LIX	Saint Tammany	114 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.