Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 7, NWS New Orleans, LA

March 11, 2016Livingston Parish, Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Mar 11, 2016, 4:16 AM CST for Livingston Parish, Tangipahoa Parish, Louisiana. It was in force for 3 hr. 1 report 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, 4:16 AM CST (10:16 UTC)
Expired
Mar 11, 2016, 7:45 AM CST
In force
3 hr
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Emergency
Flash flood emergency
Flood severity
None

Counties Livingston Parish, LA, Tangipahoa Parish, LA

What was reported inside it

TimeReportWhereRemark
Mar 11, 5:45 AM CSTFLASH FLOOD3 W Ponchatoula, LANWS STORM SPOTTER REPORTED HOMES FLOODED IN SUBDIVISION 3 MILES WEST OF PONCHATOULA. STORM TOTAL 13.10 INCHES OF RAIN SINCE 4 PM THURSDAY.

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, 10.3 hours before the alert went out and 79 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-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 2016-03-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 687 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2016-03-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 463 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

768 
WGUS54 KLIX 111016
FFWLIX
LAC063-105-111345-
/O.NEW.KLIX.FF.W.0007.160311T1016Z-160311T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

...FLASH FLOOD EMERGENCY FOR TANGIPAHOA PARISH AND FAR EASTERN
LIVINGSTON PARISH INCLUDING THE CITY OF HAMMOND...

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  TANGIPAHOA PARISH IN SOUTHEASTERN LOUISIANA...
  NORTHEASTERN LIVINGSTON PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 745 AM CST

* AT 415 AM CST...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING
  ACROSS THE WARNED AREA.  NUMEROUS HOMES ARE REPORTED FLOODED
  AROUND HAMMOND AND HIGH WATER RESCUES HAVE BEEN REPORTED DUE TO
  FLOODING. 7 TO 14 INCHES OF RAIN HAVE FALLEN. FLASH FLOODING IS
  ALREADY OCCURRING.

  THIS IS A FLASH FLOOD EMERGENCY FOR TANGIPAHOA PARISH AND
  FAR EASTERN LIVINGSTON PARISH INCLUDING THE CITY OF HAMMOND. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  HAMMOND...AMITE...PONCHATOULA...AMITE CITY...KENTWOOD...
  INDEPENDENCE...ROSELAND...ALBANY...SPRINGFIELD...ROBERT...WILMER...
  NATALBANY...KILLIAN...TANGIPAHOA AND TICKFAW.

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. THIS IS AN EXTREMELY DANGEROUS AND LIFE
THREATENING SITUATION. DO NOT ATTEMPT TO TRAVEL UNLESS YOU ARE
FLEEING AN AREA SUBJECT TO FLOODING OR UNDER AN EVACUATION ORDER.

&&

LAT...LON 3099 9035 3091 9035 3089 9032 3085 9030
      3067 9025 3035 9026 3030 9031 3030 9035
      3028 9037 3030 9043 3032 9043 3034 9048
      3030 9054 3030 9056 3028 9057 3045 9067
      3065 9063 3066 9057 3091 9057 3100 9055

$$

32

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 10, 7:12 PM CSTRiver Flood WarningLIXAscension, Livingston6 days
Mar 10, 7:12 PM CSTRiver Flood WarningLIXTangipahoa50 hr
Mar 10, 7:12 PM CSTRiver Flood WarningLIXTangipahoa68 hr
Mar 10, 7:56 PM CSTFlash Flood WarningLIXAscension, Assumption, Livingston, Saint Helena, Saint James, Saint Tammany and 2 more2 hr
Mar 10, 9:28 PM CSTFlash Flood WarningLIXAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 5 more4 hr
Mar 11, 1:24 AM CSTFlash Flood WarningLIXLivingston, Saint Helena, Saint Tammany, Tangipahoa, Washington3 hr
Mar 11, 1:50 AM CSTFlash Flood Warning EmergencyLIXTangipahoa2 hr
Mar 11, 2:13 AM CSTRiver Flood WarningLIXWashington4 days
Mar 11, 2:21 AM CSTSpecial Marine WarningLIX114 min
Mar 11, 3:13 AM CSTSpecial Marine WarningLIX62 min
Mar 11, 3:33 AM CSTSpecial Weather StatementLIXAssumption, Lafourche, Saint James, Terrebonne57 min
Mar 11, 4:06 AM CSTSevere Thunderstorm WarningLIXAssumption, Lafourche, Saint James, Saint John the Baptist, Terrebonne24 min
Mar 11, 4:12 AM CSTFlash Flood WarningLIXSaint Tammany, Washington4 hr
Mar 11, 4:28 AM CSTSevere Thunderstorm WarningLIXAscension, Jefferson, Lafourche, Livingston, Orleans, Plaquemines and 5 more32 min
Mar 11, 4:31 AM CSTSpecial Marine WarningLIX59 min
Mar 11, 4:48 AM CSTSpecial Marine WarningLIX42 min
Mar 11, 4:57 AM CSTSevere Thunderstorm WarningLIXJefferson, Livingston, Orleans, Plaquemines, Saint Bernard, Saint Charles and 3 more33 min
Mar 11, 5:04 AM CSTCoastal Flood WarningLIXSaint John the Baptist49 hr
Mar 11, 5:08 AM CSTSpecial Marine WarningLIX67 min
Mar 11, 5:15 AM CSTSpecial Weather StatementLIXPlaquemines45 min
Mar 11, 5:18 AM CSTSpecial Marine WarningLIX42 min
Mar 11, 5:21 AM CSTSevere Thunderstorm WarningLIXOrleans, Plaquemines, Saint Bernard, Saint Tammany, Tangipahoa, Washington39 min
Mar 11, 5:50 AM CSTRiver Flood WarningLIXTangipahoa50 hr
Mar 11, 6:04 AM CSTSpecial Marine WarningLIX56 min
Mar 11, 6:30 AM CSTRiver Flood WarningLIXAscension, Livingston7 days
Mar 11, 7:22 AM CSTFlash Flood Warning EmergencyLIXSaint Tammany, Tangipahoa, Washington13 hr
Mar 11, 7:37 AM CSTAreal Flood WarningLIXAscension, East Baton Rouge, Livingston9 hr
Mar 11, 7:58 AM CSTAreal Flood WarningLIXSaint Tammany3 hr
Mar 11, 8:53 AM CSTAreal Flood WarningLIXEast Baton Rouge, East Feliciana, Saint Helena3 hr
Mar 11, 12:01 PM CSTFlash Flood WarningLIXSaint Tammany8 hr
Mar 11, 12:08 PM CSTFlash Flood Warning EmergencyLIXSaint Tammany8 hr
Mar 11, 4:29 PM CSTAreal Flood WarningLIXLivingston3 hr

Nearby

Flash Flood Warnings in Louisiana, 2016Every 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.