Alert archive / Louisiana / Flash Flood Warnings in 2007

Flash Flood Warning 13, NWS New Orleans, LA

May 4, 2007Livingston Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at May 4, 2007, 8:45 AM CDT for Livingston Parish, Louisiana. It was in force for 90 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 4, 2007, 8:45 AM CDT (13:45 UTC)
Expired: May 4, 2007, 10:15 AM CDT
In force: 90 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Livingston Parish, LA

What was reported inside it

Time	Report	Where	Remark
May 4, 9:40 AM CDT	FLASH FLOOD	10 Ne Sorrento, LA	FLASH FLOODING OF ANCILLARY ROADS REPORTED AROUND FRENCH SETTLEMENT AND SOUTHERN LIVINGSTON PARISH

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 1.8 hours before the alert went out and 218 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: 93 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KLIX 041347
FFWLIX
LAC063-041515-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
845 AM CDT FRI MAY 4 2007

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LIVINGSTON PARISH IN SOUTHEAST LOUISIANA...

* UNTIL 1015 AM CDT

* AT 845 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS PRODCUING VERY HEAVY RAIN MOVING ACROSS THE SOUTHERN 
  HALF OF LIVINGSTON PARISH. RADAR RAINFALL ESTIMATES INDICATE THAT  
  TWO TO THREE INCHES OF RAIN HAVE FALLEN OVER SOUTHERN LIVINGSTON   
  PARISH EARLY THIS MORNING. THUNDERSTORMS PRODUCING ADDITIONAL      
  HEAVY RAINFALL ARE LIKELY THROUGH 10 AM OVER THE WARNED AREA.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS 
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY 
AUTOMOBILE.

LAT...LON 3025 9073 3031 9053 3047 9057 3043 9090

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 10:56 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Pointe Coupee, West Baton Rouge	25 min
May 4, 2:18 AM CDT	Special Marine Warning	LIX		57 min
May 4, 3:00 AM CDT	Tornado Warning	LIX	Jefferson, Plaquemines	30 min
May 4, 3:15 AM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	2 hr
May 4, 4:22 AM CDT	Severe Thunderstorm Warning	LIX	Plaquemines	38 min
May 4, 5:01 AM CDT	Special Marine Warning	LIX		59 min
May 4, 5:05 AM CDT	Severe Thunderstorm Warning	LIX	Plaquemines	25 min
May 4, 5:35 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge	25 min
May 4, 5:37 AM CDT	Severe Thunderstorm Warning	LIX	Plaquemines	23 min
May 4, 5:46 AM CDT	Special Marine Warning	LIX		59 min
May 4, 5:51 AM CDT	Severe Thunderstorm Warning	LIX	Saint John the Baptist	24 min
May 4, 6:00 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge	30 min
May 4, 6:38 AM CDT	Special Marine Warning	LIX		67 min
May 4, 6:46 AM CDT	Flash Flood Warning	LIX	Saint John the Baptist	119 min
May 4, 7:42 AM CDT	Severe Thunderstorm Warning	LIX	Livingston	33 min
May 4, 7:53 AM CDT	Special Marine Warning	LIX		67 min
May 4, 10:39 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Livingston	36 min
May 4, 11:03 AM CDT	Special Marine Warning	LIX		87 min
May 4, 12:08 PM CDT	Flash Flood Watch	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard, Saint Helena and 5 more	6 hr
May 4, 12:19 PM CDT	Tornado Warning	LIX	Livingston	26 min
May 4, 12:22 PM CDT	Special Marine Warning	LIX		83 min
May 4, 12:55 PM CDT	Severe Thunderstorm Warning	LIX	Saint John the Baptist	50 min
May 4, 1:09 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Saint Charles	51 min
May 4, 1:12 PM CDT	Special Marine Warning	LIX		93 min
May 4, 1:59 PM CDT	Severe Thunderstorm Warning	LIX	Saint Bernard	31 min
May 4, 2:27 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Plaquemines	48 min
May 4, 2:29 PM CDT	Flash Flood Warning	LIX	Jefferson, Orleans	2 hr
May 4, 2:29 PM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Saint Bernard	2 hr
May 4, 2:42 PM CDT	Special Marine Warning	LIX		93 min
May 4, 3:07 PM CDT	Severe Thunderstorm Warning	LIX	Plaquemines	23 min
May 4, 4:10 PM CDT	Special Marine Warning	LIX		2 hr

Nearby

Flash Flood Warnings in Louisiana, 2007 Every flash flood warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.