Alert archive / Louisiana / Flash Flood Warnings in 2012

Flash Flood Warning 2, NWS New Orleans, LA

January 26, 20126 parishes in Louisiana

NWS New Orleans, LA issued this flash flood warning at Jan 26, 2012, 12:01 AM CST for 6 parishes in Louisiana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jan 26, 2012, 12:01 AM CST (06:01 UTC)
Expired: Jan 26, 2012, 3:00 AM CST
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Livingston Parish, LA, Saint Helena Parish, LA, West Baton Rouge Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 6.0 hours before the alert went out and 152 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: 794 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 544 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 225 m²/s²
0-3 km storm-relative helicity: 235 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

568 
WGUS54 KLIX 260601
FFWLIX
LAC033-037-047-063-091-121-260900-
/O.NEW.KLIX.FF.W.0002.120126T0601Z-120126T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1201 AM CST THU JAN 26 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST BATON ROUGE...EAST FELICIANA...IBERVILLE...
  NORTHWESTERN LIVINGSTON...NORTHWESTERN ST. HELENA...
  AND WEST BATON ROUGE PARISHES...

* UNTIL 300 AM CST

* AT 1151 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
  THUNDERSTORMS PRODUCING HEAVY RAINFALL ACROSS THE BATON ROUGE
  METRO AREA AS WELL AS LOCATIONS SOUTHWEST AND NORTHEAST OF THAT 
  AREA. REPEATED HEAVY RAIN FROM TRAINING THUNDERSTORMS WILL LIKELY
  LEAD TO FLASH FLOODING OF URBAN AND OTHER LOW LYING AREAS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES OF RAIN ARE POSSIBLE IN
THE WARNED AREA.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

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 3064 9129 3092 9121 3094 9119 3097 9120
      3098 9118 3098 9073 3098 9072 3036 9100
      3006 9134 3020 9150 3023 9148 3024 9154
      3031 9162

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 25, 7:45 PM CST	Flash Flood Watch	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 7 more	15 hr
Jan 25, 9:50 PM CST	Areal Flood Advisory	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 11 more	224 days
Jan 25, 11:05 PM CST	Areal Flood Advisory	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Helena, West Baton Rouge and 1 more	55 min
Jan 26, 2:50 AM CST	Special Marine Warning	LIX		25 min
Jan 26, 3:18 AM CST	Special Marine Warning	LIX		57 min
Jan 26, 3:29 AM CST	Special Marine Warning	LIX		31 min
Jan 26, 4:18 AM CST	Special Marine Warning	LIX		57 min
Jan 26, 4:23 AM CST	Areal Flood Advisory	LIX	Washington	112 min
Jan 26, 4:27 AM CST	Areal Flood Advisory	LIX	Livingston, Saint Tammany, Tangipahoa	2 hr
Jan 26, 4:30 AM CST	Small Craft Advisory	LIX		26 hr
Jan 26, 5:15 AM CST	Special Marine Warning	LIX		60 min
Jan 26, 5:34 AM CST	Special Marine Warning	LIX		56 min
Jan 26, 6:00 AM CST	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	107 min
Jan 26, 6:07 AM CST	Special Marine Warning	LIX		23 min
Jan 26, 6:17 AM CST	Special Marine Warning	LIX		118 min
Jan 26, 6:30 AM CST	Special Marine Warning	LIX		30 min
Jan 26, 7:12 AM CST	Tornado Warning	LIX	Plaquemines	33 min
Jan 26, 7:21 AM CST	Special Marine Warning	LIX		54 min
Jan 26, 7:33 AM CST	Special Marine Warning	LIX		27 min
Jan 26, 7:37 AM CST	Tornado Warning	LIX	Plaquemines	23 min
Jan 26, 7:55 AM CST	Special Marine Warning	LIX		2 hr
Jan 26, 8:04 AM CST	Special Marine Warning	LIX		56 min
Jan 26, 8:15 AM CST	Special Marine Warning	LIX		60 min
Jan 26, 8:59 AM CST	Special Marine Warning	LIX		61 min
Jan 26, 9:24 AM CST	River Flood Warning	LIX	Saint Tammany, Washington	6 days
Jan 26, 9:24 AM CST	River Flood Warning	LIX	Saint Tammany	6 days
Jan 26, 9:59 AM CST	River Flood Warning	LIX	Tangipahoa	33 hr
Jan 26, 9:59 AM CST	River Flood Warning	LIX	Tangipahoa	47 hr
Jan 26, 10:21 AM CST	River Flood Warning	LIX	East Baton Rouge, Livingston	72 hr
Jan 26, 10:21 AM CST	River Flood Warning	LIX	East Baton Rouge	23 hr
Jan 26, 10:24 AM CST	River Flood Warning	LIX	Saint Tammany	8 days
Jan 26, 10:25 AM CST	Special Marine Warning	LIX		50 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.