Alert archive / Louisiana / Flash Flood Warnings in 2012

Flash Flood Warning 23, NWS New Orleans, LA

May 7, 2012East Feliciana Parish, West Feliciana Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at May 7, 2012, 5:42 PM CDT for East Feliciana Parish, West Feliciana 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 outline as issued.

The facts

Issued: May 7, 2012, 5:42 PM CDT (22:42 UTC)
Expired: May 7, 2012, 8:03 PM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties East Feliciana Parish, LA, West Feliciana Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.7 hours before the alert went out and 156 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: 1878 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 514 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: -45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

854 
WGUS54 KLIX 072242
FFWLIX
LAC037-125-080145-
/O.NEW.KLIX.FF.W.0023.120507T2242Z-120508T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
542 PM CDT MON MAY 7 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST FELICIANA PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITIES OF...JACKSON...CLINTON...
  SOUTHEASTERN WEST FELICIANA PARISH IN SOUTHEAST LOUISIANA...

* UNTIL 845 PM CDT

* AT 537 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA OF WEST AND 
EAST FELICIANA PARISHES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3094 9133 3092 9087 3072 9088 3071 9126
      3079 9139

$$

1 follow-up statement

531 
WGUS74 KLIX 080103
FFSLIX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
803 PM CDT MON MAY 7 2012

LAC037-125-080111-
/O.CAN.KLIX.FF.W.0023.000000T0000Z-120508T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EAST FELICIANA LA-WEST FELICIANA LA-
803 PM CDT MON MAY 7 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN WEST
FELICIANA AND EAST FELICIANA PARISHES...

THE THREAT OF FLASH FLOODING HAS ENDED ACROSS WEST AND EAST 
FELICIANA PARISHES.

LAT...LON 3094 9133 3092 9087 3072 9088 3071 9126
      3079 9139

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 7:17 PM CDT	Areal Flood Advisory	LIX	Assumption, Iberville	118 min
May 6, 8:48 PM CDT	Flash Flood Warning	LIX	Iberville, Pointe Coupee, West Baton Rouge	117 min
May 6, 10:41 PM CDT	Areal Flood Advisory	LIX	Pointe Coupee, West Feliciana	2 hr
May 7, 2:20 PM CDT	Areal Flood Advisory	LIX	Saint Tammany	115 min
May 7, 3:23 PM CDT	Severe Thunderstorm Warning	LIX	Terrebonne	67 min
May 7, 5:25 PM CDT	Areal Flood Advisory	LIX	East Feliciana, West Feliciana	110 min
May 7, 5:47 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana	28 min
May 7, 5:57 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Livingston, Saint Helena	33 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.