Alert archive / Louisiana / Flash Flood Warnings in 2012

Flash Flood Warning 24, NWS New Orleans, LA

May 23, 2012East Baton Rouge Parish, Livingston Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at May 23, 2012, 5:46 PM CDT for East Baton Rouge Parish, Livingston Parish, Louisiana. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 23, 2012, 5:46 PM CDT (22:46 UTC)
Expired: May 23, 2012, 6:43 PM CDT
In force: 57 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties East Baton Rouge Parish, LA, Livingston Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.8 hours before the alert went out and 122 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: 665 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1168 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

300 
WGUS54 KLIX 232246
FFWLIX
LAC033-063-240145-
/O.NEW.KLIX.FF.W.0024.120523T2246Z-120524T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
546 PM CDT WED MAY 23 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL EAST BATON ROUGE PARISH IN SOUTHEAST LOUISIANA...
  WEST CENTRAL LIVINGSTON PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF DENHAM SPRINGS...

* UNTIL 845 PM CDT

* AT 543 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
  FLASH FLOODING FROM A THUNDERSTORM NEAR DENHAM SPRINGS...MOVING    
  EAST AT 5 MPH. TWO TO THREE INCHES OF RAIN HAS LIKELY ALREADY      
  OCCURRED WITH AN ADDITIONAL TWO INCHES POSSIBLE THROUGH ABOUT 7 PM.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WALKER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

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 3056 9086 3041 9086 3042 9105 3059 9105

$$

1 follow-up statement

228 
WGUS74 KLIX 232343
FFSLIX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
643 PM CDT WED MAY 23 2012

LAC033-063-232352-
/O.CAN.KLIX.FF.W.0024.000000T0000Z-120524T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EAST BATON ROUGE LA-LIVINGSTON LA-
643 PM CDT WED MAY 23 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WEST CENTRAL
LIVINGSTON AND EAST CENTRAL EAST BATON ROUGE PARISHES...

THE THUNDERSTORMS THAT PROMPTED THE FLASH FLOOD WARNING HAVE 
DISSIPATED. FLASH FLOODING IS NO LONGER EXPECTED.

LAT...LON 3056 9086 3041 9086 3042 9105 3059 9105

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 3:51 AM CDT	Special Marine Warning	LIX		54 min
May 23, 3:05 PM CDT	Special Marine Warning	LIX		25 min
May 23, 3:26 PM CDT	Special Marine Warning	LIX		34 min
May 23, 3:40 PM CDT	Special Marine Warning	LIX		35 min
May 23, 5:40 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Livingston	30 min
May 23, 6:04 PM CDT	Severe Thunderstorm Warning	LIX	Washington	26 min

Nearby

Flash Flood Warnings in Louisiana, 2012 Every flash flood warning in 2012

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.