Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 5, NWS New Orleans, LA

March 11, 2016Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Mar 11, 2016, 1:50 AM CST for Tangipahoa Parish, Louisiana. It was in force for 2 hr. 2 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, 1:50 AM CST (07:50 UTC)
Expired: Mar 11, 2016, 4:15 AM CST
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Emergency: Flash flood emergency
Flood severity: None

County Tangipahoa Parish, LA

What was reported inside it

Time	Report	Where	Remark
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.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 25 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 7.8 hours before the alert went out and 81 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.

700 
WGUS54 KLIX 110750
FFWLIX
LAC105-111015-
/O.NEW.KLIX.FF.W.0005.160311T0750Z-160311T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

...FLASH FLOOD EMERGENCY FOR TANGIPAHOA 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...

* UNTIL 415 AM CST

* AT 148 AM CST...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING
  ACROSS THE WARNED AREA. HIGH WATER RESCUES WERE REPORTED BY LOCAL
  LAW ENFORCEMENT IN THE CITY OF HAMMOND.  6 TO 11 INCHES OF RAIN
  HAVE FALLEN. FLASH FLOODING IS ALREADY OCCURRING.

  THIS IS A FLASH FLOOD EMERGENCY FOR TANGIPAHOA PARISH INCLUDING
  THE CITY OF HAMMOND.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  HAMMOND...AMITE...PONCHATOULA...AMITE CITY...KENTWOOD...
  INDEPENDENCE...ROSELAND...ROBERT...WILMER...NATALBANY...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 3091 9035 3089 9032 3085 9030 3069 9025
      3036 9025 3028 9039 3029 9041 3049 9057
      3099 9055 3099 9035

$$

32

1 follow-up statement

539 
WGUS74 KLIX 110909
FFSLIX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
309 AM CST FRI MAR 11 2016

LAC105-111015-
/O.CON.KLIX.FF.W.0005.000000T0000Z-160311T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TANGIPAHOA LA-
309 AM CST FRI MAR 11 2016

...THIS IS A FLASH FLOOD EMERGENCY FOR TANGIPAHOA PARISH
INCLUDING THE CITY OF HAMMOND...

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM CST FOR
TANGIPAHOA PARISH...

AT 307 AM CST...TANGIPAHOA PARISH OFFICIALS REPORTED FLASH FLOODING
IN HAMMOND.  SEVERAL HOMES ARE REPORTED FLOODED AND HIGH WATER
RESCUES ARE OCCURRING. 7 TO 14 INCHES OF RAIN HAVE FALLEN. FLASH
FLOODING IS ALREADY OCCURRING.

THIS IS A FLASH FLOOD EMERGENCY FOR TANGIPAHOA PARISH INCLUDING
THE CITY OF HAMMOND. SEEK HIGHER GROUND NOW!

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

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 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 3091 9035 3089 9032 3085 9030 3069 9025
      3036 9025 3028 9039 3029 9041 3049 9057
      3099 9055 3099 9035

$$

32

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this flash flood warning went out at Mar 10, 11:38 PM CST, 2 hours 12 minutes earlier.

Area forecast discussion, Mar 10, 11:38 PM CST, 2 hours 12 minutes before

AREA FORECAST DISSCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1138 PM CST THU MAR 10 2016

.AVIATION...
IFR CONDITIONS WILL GENERALLY PREVAIL AT THE TERMINALS THROUGH
THE TAF FORECAST PERIOD. LOW CEILINGS AND MULTIPLE BOUTS OF
CONVECTION WILL IMPACT THE TAF SITES THROUGH THE DAY FRIDAY AND
INTO FRIDAY NIGHT. 11

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  68  72  65  72 / 100 100  80  90
BTR  68  73  65  74 / 100 100  80  80
ASD  69  73  67  73 / 100 100  90  90
MSY  69  73  67  74 / 100 100  90  90
GPT  68  73  67  72 / 100 100  90  90
PQL  68  73  66  72 / 100 100  90  90

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...FLASH FLOOD WATCH THROUGH SATURDAY AFTERNOON FOR LAZ034>037-039-
     040-046>050-056>072.

     COASTAL FLOOD ADVISORY UNTIL 6 PM CST FRIDAY FOR LAZ040-049-050-
     057-058-060>064-066>070-072.

GM...SMALL CRAFT ADVISORY UNTIL 6 PM CST FRIDAY FOR GMZ530-532-534-
     536-538-550-552-555-557-570-572-575-577.

MS...FLASH FLOOD WATCH THROUGH SATURDAY AFTERNOON FOR MSZ068>071-077-
     080>082.

     COASTAL FLOOD ADVISORY UNTIL 6 PM CST FRIDAY FOR MSZ080>082.

GM...SMALL CRAFT ADVISORY UNTIL 6 PM CST FRIDAY FOR GMZ532-534-536-
     538-550-552-555-557-570-572-575-577.

&&

Hazardous weather outlook, Mar 10, 6:00 PM CST, 7 hours 50 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
600 PM CST THU MAR 10 2016

GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037-
039-040-046>050-056>072-MSZ068>071-077-080>082-111400-
LAKE PONTCHARTRAIN AND LAKE MAUREPAS-MISSISSIPPI SOUND-
LAKE BORGNE-CHANDELEUR SOUND-BRETON SOUND-
COASTAL WATERS FROM PORT FOURCHON LA TO LOWER ATCHAFALAYA RIVER
LA OUT 20 NM-
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER
TO PORT FOURCHON LOUISIANA OUT 20 NM-
COASTAL WATERS FROM BOOTHVILLE LA TO SOUTHWEST PASS OF THE
MISSISSIPPI RIVER OUT 20 NM-
COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND OUT
20 NM-
COASTAL WATERS FROM PORT FOURCHON LOUISIANA TO LOWER ATCHAFALAYA
RIVER LA FROM 20 TO 60 NM-
COASTAL WATERS FROM SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO
PORT FOURCHON LOUISIANA FROM 20 TO 60 NM-
COASTAL WATERS FROM STAKE ISLAND LA TO SOUTHWEST PASS OF THE
MISSISSIPPI RIVER FROM 20 TO 60 NM-
COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND
LOUISIANA OUT 20 TO 60 NM-POINTE COUPEE-WEST FELICIANA-
EAST FELICIANA-ST. HELENA-WASHINGTON-ST. TAMMANY-IBERVILLE-
WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON-ASSUMPTION-
ST. JAMES-ST. JOHN THE BAPTIST-UPPER LAFOURCHE-ST. CHARLES-
UPPER JEFFERSON-ORLEANS-UPPER PLAQUEMINES-UPPER ST. BERNARD-
UPPER TERREBONNE-LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON-
LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA-
SOUTHERN TANGIPAHOA-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER-
HANCOCK-HARRISON-JACKSON-
600 PM CST THU MAR 10 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
LOUISIANA...SOUTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS.

.DAY ONE...TONIGHT

SMALL CRAFT ADVISORIES REMAIN IN EFFECT FOR ALL THE COASTAL WATERS TONIGHT.

A COASTAL FLOOD ADVISORY IS IN EFFECT FOR ALL COASTAL LOCATIONS
FROM THE MOUTH OF THE ATCHAFALAYA RIVER TO THE MISSISSIPPI-ALABAMA
STATE LINE. TIDES UP TO 2.5 ABOVE NORMAL CAN BE EXPECTED WITH A FEW
LOCATIONS SEEING TIDES OF 3 TO 3.5 FEET ABOVE NORMAL LEVELS.

A MARGINAL RISK OF SEVERE THUNDERSTORMS WILL EXIST FOR THE ENTIRE
AREA TONIGHT. THE MAIN CONCERNS WILL BE DAMAGING WINDS AND THE
POSSIBILITY OF AN ISOLATED TORNADO.

A FLASH FLOOD WATCH REMAINS IN EFFECT. HEAVY RAINFALL IS EXPECTED TO
IMPACT SOME AREAS OVERNIGHT WITH A FEW INCHES OF RAINFALL POSSIBLE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A FLASH FLOOD WATCH WILL REMAIN IN EFFECT FOR THE ENTIRE AREA
THROUGH SATURDAY AFTERNOON. STORM TOTAL RAINFALL AMOUNTS OF 7 TO 10
INCHES ARE EXPECTED WITH LOCALLY HIGHER AMOUNTS POSSIBLE.

A SMALL CRAFT ADVISORY WILL REMAIN IN EFFECT FOR ALL OF THE
COASTAL WATERS THROUGH FRIDAY FOR HAZARDOUS CONDITIONS FOR SMALL
CRAFT.

A COASTAL FLOOD ADVISORY WILL REMAIN IN EFFECT FOR ALL COASTAL
LOCATIONS FROM THE MOUTH OF THE ATCHAFALAYA RIVER TO THE MISSISSIPPI-
ALABAMA STATE LINE THROUGH FRIDAY. TIDES UP TO 2.5 FEET ABOVE NORMAL
CAN BE EXPECTED WITH A FEW LOCATIONS SEEING TIDES OF 3 TO 3.5 FEET
ABOVE NORMAL LEVELS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THROUGH SATURDAY...MAINLY FOR
FLOOD REPORTING.

In the hours before

Local storm report, Mar 10, 8:26 PM CST, 5 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
826 PM CST THU MAR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0805 PM     FLASH FLOOD      2 NW SPRINGFIELD        30.45N 90.57W
03/10/2016                   LIVINGSTON         LA   BROADCAST MEDIA

            PORTIONS OF GEORGE WHITE ROAD REPORTED UNDER A FOOT OF
            WATER.

&&

BWAGNER

Local storm report, Mar 11, 1:44 AM CST, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
144 AM CST FRI MAR 11 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1230 AM     FLASH FLOOD      HAMMOND                 30.51N 90.46W
03/11/2016                   TANGIPAHOA         LA   EMERGENCY MNGR

            NUMEROUS ROADS CLOSED ACROSS TANGIPAHOA PARISH DUE TO
            HIGH WATER.

&&

BWAGNER

Local storm report, Mar 11, 1:47 AM CST, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
147 AM CST FRI MAR 11 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0140 AM     FLASH FLOOD      HAMMOND                 30.51N 90.46W
03/11/2016                   TANGIPAHOA         LA   LAW ENFORCEMENT

            HIGH WATER RESCUES ONGOING IN HAMMOND.

&&

BWAGNER

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, 1:24 AM CST	Flash Flood Warning	LIX	Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington	3 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

Nearby

Flash Flood Warnings in Louisiana, 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.