Alert archive / Louisiana / Flash Flood Warnings in 2002

Flash Flood Warning 9, NWS New Orleans, LA

August 6, 2002East Feliciana Parish, Saint Helena Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Aug 6, 2002, 1:31 PM CDT for East Feliciana Parish, Saint Helena 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, 1:31 PM CDT (18:31 UTC)
Expired: Aug 6, 2002, 3:30 PM CDT
In force: 119 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties East Feliciana Parish, LA, Saint Helena Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.5 hours before the alert went out and 130 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 
WGUS54 KLIX 061831
FFWNEW
LAC037-091-062030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
123 PM CDT TUE AUG 6 2002

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST FELICIANA PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES TRHE CITIES OF NORWOOD...WILSON AND CLINTON
  ST. HELENA PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITIES OF GREENSBURG...PINE GROVE

* UNTIL 330 PM CDT

* AT 118 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER
  OF VERY STRONG SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAIN FROM 
  NORWOOD TO CLINTON TO PINE GROVE. THIS AREA OF HEAVY RAIN IS DRIFTING
  EAST AND NORTHEAST ABOUT 5 MPH.

DOPPLER RADAR HAS INDICATED 4 TO 6 INCHES OF RAIN IN THE PAST 3 
HOURS IN PORTIONS OF EAST FELICIANA TO ST. HELENA PARISHES WITH THE 
MAIN PROBLEM PRESENTLY EXISTING FROM NORWOOD TO CLINTON TO PINE 
GROVE. CREEKS...RIVERS AND BAYOUS MAY HAVE RAPID RISES DUE TO 
SATURATED SOIL AND PREVIOUS HEAVY RAINFALL. 

THIS IS BECOMING A CRITICAL FLOOD SITUATION IN THESE PARISHES.

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 FLOODING 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, 6:31 AM CDT	Flash Flood Warning	LIX	Saint Tammany	119 min
Aug 6, 9:36 AM CDT	Flash Flood Warning	LIX	Saint Tammany	114 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.