Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS New Orleans, LA

March 11, 20165 parishes in Louisiana; 4 counties in Mississippi

NWS New Orleans, LA issued this flash flood warning at Mar 11, 2016, 1:24 AM CST for 5 parishes in Louisiana; 4 counties in Mississippi. It was in force for 3 hr. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 11, 2016, 1:24 AM CST (07:24 UTC)
Expired: Mar 11, 2016, 4:15 AM CST
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Livingston Parish, LA, Saint Helena Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Amite County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS

What was reported inside it

Time	Report	Where	Remark
Mar 11, 1:40 AM CST	FLASH FLOOD	Hammond, LA	HIGH WATER RESCUES ONGOING IN HAMMOND.
Mar 11, 1:50 AM CST	FLASH FLOOD	Folsom, LA	SEVERAL ROADS CLOSED DUE TO HIGH WATER IN THE FOLSOM AREA.
Mar 11, 2:15 AM CST	FLASH FLOOD	Hammond, LA	EAST MORRIS AVENUE IN HAMMOND CLOSED DUE TO HIGH WATER. THREE VEHICLES ABANDONED IN ROADWAY.
Mar 11, 2:55 AM CST	FLASH FLOOD	Hammond, LA	BROADCAST MEDIA ON SOCIAL MEDIA REPORTED WATER IN 40 TO 50 HOMES NEAR RUFUS BANKSTON AND QUICK BOULEVARD IN HAMMOND WITH WATER RESCUES OCCURRING.
Mar 11, 3:15 AM CST	FLASH FLOOD	Franklinton, LA	BROADCAST MEDIA RELAYED REPORT FROM FRANKLINTON POLICE DEPARTMENT OF MODERATE STREET FLOODING. ALSO REPORT THAT THE FAIRGROUNDS ARE FLOODED WITH THE POTENTIAL TO WASH OUT A BRIDGE. ONE CAR COMPLETELY SUBMERGED.
Mar 11, 3:30 AM CST	HEAVY RAIN 7.57	Livingston, LA	CO-OP OBSERVER IN LIVINGSTON REPORTS STORM TOTAL OF 7.57 INCHES AND STILL RAINING.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 7.4 hours before the alert went out and 83 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: 687 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 463 m²/s²
0-3 km storm-relative helicity: 470 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 14.9

Open this sounding in Storm Lab

The text

As transmitted.

042 
WGUS54 KLIX 110724
FFWLIX
LAC063-091-103-105-117-MSC005-109-113-147-111015-
/O.NEW.KLIX.FF.W.0004.160311T0724Z-160311T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
124 AM CST FRI MAR 11 2016

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WASHINGTON PARISH IN SOUTHEASTERN LOUISIANA...
  NORTHWESTERN ST. TAMMANY PARISH IN SOUTHEASTERN LOUISIANA...
  TANGIPAHOA PARISH IN SOUTHEASTERN LOUISIANA...
  LIVINGSTON PARISH IN SOUTHEASTERN LOUISIANA...
  ST. HELENA PARISH IN SOUTHEASTERN LOUISIANA...
  WALTHALL COUNTY IN SOUTHERN MISSISSIPPI...
  NORTHWESTERN PEARL RIVER COUNTY IN SOUTHERN MISSISSIPPI...
  EASTERN AMITE COUNTY IN SOUTHERN MISSISSIPPI...
  PIKE COUNTY IN SOUTHERN MISSISSIPPI...

* UNTIL 415 AM CST

* AT 120 AM CST...EMERGENCY MANAGEMENT AND THE PUBLIC REPORTED FLASH
  FLOODING ACROSS THE WARNED AREA. NUMEROUS ROADS IN SEVERAL
  PARISHES AND COUNTIES HAVE BEEN REPORTED AS CLOSED DUE TO HIGH
  WATER COVERING THEM. 6 TO 11 INCHES OF RAIN HAVE FALLEN. FLASH
  FLOODING IS ALREADY OCCURRING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  HAMMOND...MCCOMB...BOGALUSA...DENHAM SPRINGS...FRANKLINTON...
  LIBERTY...GREENSBURG...AMITE...PONCHATOULA...WALKER...AMITE CITY...
  MAGNOLIA...KENTWOOD...LIVINGSTON...SUMMIT...INDEPENDENCE...
  TYLERTOWN...VARNADO...ROSELAND AND FRENCH SETTLEMENT.

ADDITIONAL RAINFALL AMOUNTS OF 3 TO 5 INCHES ARE POSSIBLE IN THE
WARNED AREA OVER THE NEXT 3 HOURS.  


PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 3134 9004 3114 9001 3113 8994 3107 8992
      3107 8984 3100 8983 3101 8954 3068 8966
      3056 9012 3030 9032 3029 9040 3034 9049
      3023 9066 3018 9069 3034 9086 3039 9096
      3064 9092 3072 9084 3131 9081 3135 9068

$$

32

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 10, 7:12 PM CST	River Flood Warning	LIX	Ascension, Livingston	6 days
Mar 10, 7:12 PM CST	River Flood Warning	LIX	Tangipahoa	50 hr
Mar 10, 7:12 PM CST	River Flood Warning	LIX	Tangipahoa	68 hr
Mar 10, 7:56 PM CST	Flash Flood Warning	LIX	Ascension, Assumption, Livingston, Saint Helena, Saint James, Saint Tammany and 2 more	2 hr
Mar 10, 9:28 PM CST	Flash Flood Warning	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 5 more	4 hr
Mar 11, 1:50 AM CST	Flash Flood Warning Emergency	LIX	Tangipahoa	2 hr
Mar 11, 2:13 AM CST	River Flood Warning	LIX	Washington	4 days
Mar 11, 2:21 AM CST	Special Marine Warning	LIX		114 min
Mar 11, 3:13 AM CST	Special Marine Warning	LIX		62 min
Mar 11, 3:33 AM CST	Special Weather Statement	LIX	Assumption, Lafourche, Saint James, Terrebonne	57 min
Mar 11, 4:06 AM CST	Severe Thunderstorm Warning	LIX	Assumption, Lafourche, Saint James, Saint John the Baptist, Terrebonne	24 min
Mar 11, 4:12 AM CST	Flash Flood Warning	LIX	Saint Tammany, Washington	4 hr
Mar 11, 4:16 AM CST	Flash Flood Warning Emergency	LIX	Livingston, Tangipahoa	3 hr
Mar 11, 4:28 AM CST	Severe Thunderstorm Warning	LIX	Ascension, Jefferson, Lafourche, Livingston, Orleans, Plaquemines and 5 more	32 min
Mar 11, 4:31 AM CST	Special Marine Warning	LIX		59 min
Mar 11, 4:48 AM CST	Special Marine Warning	LIX		42 min
Mar 11, 4:57 AM CST	Severe Thunderstorm Warning	LIX	Jefferson, Livingston, Orleans, Plaquemines, Saint Bernard, Saint Charles and 3 more	33 min
Mar 11, 5:04 AM CST	Coastal Flood Warning	LIX	Saint John the Baptist	49 hr
Mar 11, 5:08 AM CST	Special Marine Warning	LIX		67 min
Mar 11, 5:15 AM CST	Special Weather Statement	LIX	Plaquemines	45 min
Mar 11, 5:18 AM CST	Special Marine Warning	LIX		42 min
Mar 11, 5:21 AM CST	Severe Thunderstorm Warning	LIX	Orleans, Plaquemines, Saint Bernard, Saint Tammany, Tangipahoa, Washington	39 min
Mar 11, 5:50 AM CST	River Flood Warning	LIX	Tangipahoa	50 hr
Mar 11, 6:04 AM CST	Special Marine Warning	LIX		56 min
Mar 11, 6:30 AM CST	River Flood Warning	LIX	Ascension, Livingston	7 days
Mar 11, 7:22 AM CST	Flash Flood Warning Emergency	LIX	Saint Tammany, Tangipahoa, Washington	13 hr
Mar 11, 7:37 AM CST	Areal Flood Warning	LIX	Ascension, East Baton Rouge, Livingston	9 hr
Mar 11, 7:58 AM CST	Areal Flood Warning	LIX	Saint Tammany	3 hr
Mar 11, 8:53 AM CST	Areal Flood Warning	LIX	East Baton Rouge, East Feliciana, Saint Helena	3 hr
Mar 11, 12:01 PM CST	Flash Flood Warning	LIX	Saint Tammany	8 hr
Mar 11, 12:08 PM CST	Flash Flood Warning Emergency	LIX	Saint Tammany	8 hr
Mar 11, 4:29 PM CST	Areal Flood Warning	LIX	Livingston	3 hr
Mar 10, 9:02 PM CST	Areal Flood Advisory	LIX	Amite, Pike, Walthall	118 min
Mar 11, 2:17 AM CST	River Flood Warning	LIX	Jackson	15 days
Mar 11, 2:19 AM CST	River Flood Warning	LIX	Jackson	5 days
Mar 11, 5:58 AM CST	Special Weather Statement	LIX	Hancock, Pearl River	62 min
Mar 11, 6:54 AM CST	Special Weather Statement	LIX	Harrison	36 min
Mar 11, 7:30 AM CST	Areal Flood Advisory	LIX	Hancock, Harrison, Jackson	3 hr
Mar 11, 7:44 AM CST	Flash Flood Warning	LIX	Walthall	8 hr
Mar 11, 7:59 AM CST	Flash Flood Warning	LIX	Pike	8 hr
Mar 11, 8:40 AM CST	Flash Flood Warning	LIX	Harrison, Jackson	3 hr
Mar 11, 9:09 AM CST	River Flood Warning	LIX	Harrison	71 hr
Mar 11, 9:15 AM CST	River Flood Warning	LIX	Harrison	57 hr

Nearby

Flash Flood Warnings in Louisiana, 2016 Flash Flood Warnings in Mississippi, 2016 Every flash flood warning in 2016

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.