Alert archive / Louisiana / Flash Flood Warnings in 2003

Flash Flood Warning 2, NWS New Orleans, LA

March 12, 2003Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Mar 12, 2003, 5:24 PM CST for Saint Bernard Parish, Louisiana. It was in force for 2 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: Mar 12, 2003, 5:24 PM CST (23:24 UTC)
Expired: Mar 12, 2003, 7:30 PM CST
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

County Saint Bernard Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.4 hours before the alert went out and 43 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: 251 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 643 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 202 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 122329
FFWNEW
LAC087-130130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
524 PM CST WED MAR 12 2003

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

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

* UNTIL 730 PM CST

* AT 514 PM CST...THE PUBLIC REPORTED WIDESPREAD STREET FLOODING 
WITH WATER INSIDE SOME CARS IN AND AROUND THE POYDRAS AREA.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS 
AND STREAMS...HIGHWAYS...STREETS AND UNDERPASSES.

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.

Issued	Product	Office	Counties	Lasted
Mar 12, 1:19 PM CST	Special Marine Warning	LIX		116 min
Mar 12, 2:13 PM CST	Severe Thunderstorm Warning	LIX	Lafourche, Terrebonne	47 min
Mar 12, 2:29 PM CST	Special Marine Warning	LIX		61 min
Mar 12, 3:13 PM CST	Special Marine Warning	LIX		2 hr
Mar 12, 3:28 PM CST	Severe Thunderstorm Warning	LIX	Saint James	47 min
Mar 12, 3:35 PM CST	Special Marine Warning	LIX		40 min
Mar 12, 4:17 PM CST	Severe Thunderstorm Warning	LIX	Livingston	58 min
Mar 12, 4:33 PM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	57 min
Mar 12, 5:08 PM CST	Special Marine Warning	LIX		2 hr
Mar 12, 5:35 PM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	55 min
Mar 12, 5:45 PM CST	Severe Thunderstorm Warning	LIX	Tangipahoa, Washington	60 min

Nearby

Flash Flood Warnings in Louisiana, 2003 Every flash flood warning in 2003

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.