Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 63, NWS New Orleans, LA

August 13, 20169 parishes in Louisiana

NWS New Orleans, LA issued this flash flood warning at Aug 13, 2016, 8:14 AM CDT for 9 parishes in Louisiana. It was in force for 6 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
Aug 13, 2016, 8:14 AM CDT (13:14 UTC)
Expired
Aug 13, 2016, 2:15 PM CDT
In force
6 hr
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.2 hours before the alert went out and 161 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 12:00Z on 2016-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2016-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -120 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1240 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-120 m²/s²
0-3 km storm-relative helicity
-74 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

567 
WGUS54 KLIX 131314
FFWLIX
LAC005-033-037-047-063-077-091-121-125-131915-
/O.NEW.KLIX.FF.W.0063.160813T1314Z-160813T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
814 AM CDT SAT AUG 13 2016

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LIVINGSTON PARISH IN SOUTHEASTERN LOUISIANA...
  WEST BATON ROUGE PARISH IN SOUTHEASTERN LOUISIANA...
  WEST FELICIANA PARISH IN SOUTHEASTERN LOUISIANA...
  POINTE COUPEE PARISH IN SOUTHEASTERN LOUISIANA...
  ST. HELENA PARISH IN SOUTHEASTERN LOUISIANA...
  IBERVILLE PARISH IN SOUTHEASTERN LOUISIANA...
  EAST BATON ROUGE PARISH IN SOUTHEASTERN LOUISIANA...
  EAST FELICIANA PARISH IN SOUTHEASTERN LOUISIANA...
  ASCENSION PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 215 PM CDT SATURDAY

* AT 813 AM CDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
  HEAVY RAIN CONTINUING TO FALL OVER AREAS THAT HAVE RECEIVED
  BETWEEN 10 AND 26 INCHES OF RAINFALL IN THE PAST 24 HOURS.
  FLASH FLOODING IS ALREADY OCCURRING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BATON ROUGE...ZACHARY...BAKER...DENHAM SPRINGS...GONZALES...
  DONALDSONVILLE...PLAQUEMINE...PORT ALLEN...NEW ROADS...JACKSON...
  ST. FRANCISVILLE...CLINTON...GREENSBURG...OAK HILLS PLACE...
  ST. GABRIEL...WALKER...ADDIS...BRUSLY...
  WHITE CASTLE AND LIVINGSTON.

ADDITIONAL RAINFALL AMOUNTS OF 3 TO 6 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

&&

LAT...LON 3098 9180 3104 9172 3104 9165 3097 9166
      3100 9164 3100 9057 3049 9057 3034 9047
      3030 9056 3017 9064 3006 9096 3003 9122
      3010 9146 3023 9148 3026 9159 3044 9164
      3050 9175 3071 9173 3086 9182

$$

24/RR
1 follow-up statement
043 
WGUS74 KLIX 131423
FFSLIX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
923 AM CDT SAT AUG 13 2016

LAC005-033-037-047-063-077-091-121-125-131915-
/O.CON.KLIX.FF.W.0063.000000T0000Z-160813T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LIVINGSTON LA-WEST BATON ROUGE LA-WEST FELICIANA LA-POINTE COUPEE LA-
ST. HELENA LA-IBERVILLE LA-EAST BATON ROUGE LA-EAST FELICIANA LA-
ASCENSION LA-
923 AM CDT SAT AUG 13 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM CDT FOR
LIVINGSTON...WEST BATON ROUGE...WEST FELICIANA...POINTE COUPEE...ST.
HELENA...IBERVILLE...EAST BATON ROUGE...EAST FELICIANA AND ASCENSION
PARISHES...

AT 920 AM CDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THAT THE HEAVY RAIN WAS BEGINNING TO DIMINISH IN COVERAGE IN THE
PAST HOUR. BETWEEN ONE-QUARTER AND ONE-HALF INCH OF RAINFALL HAD
FALLEN SINCE 815 AM CDT. WIDESPREAD FLOODING IS ALREADY OCCURRING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BATON ROUGE...ZACHARY...BAKER...DENHAM SPRINGS...GONZALES...
DONALDSONVILLE...PLAQUEMINE...PORT ALLEN...NEW ROADS...JACKSON...ST.
FRANCISVILLE...CLINTON...GREENSBURG...OAK HILLS PLACE...ST. GABRIEL...
WALKER...ADDIS...BRUSLY...WHITE CASTLE AND LIVINGSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

STAY AWAY OR BE SWEPT AWAY. ALL RIVERS AND STREAMS ARE AT
DANGEROUSLY HIGH AND FAST-MOVING LEVELS. 

&&

LAT...LON 3098 9180 3104 9172 3104 9165 3097 9166
      3100 9164 3100 9057 3049 9057 3034 9047
      3030 9056 3017 9064 3006 9096 3003 9122
      3010 9146 3023 9148 3026 9159 3044 9164
      3050 9175 3071 9173 3086 9182

$$

24/RR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 10:44 PM CDTAreal Flood AdvisoryLIXAscension, East Baton Rouge, East Feliciana, Iberville, Livingston, Saint Helena and 1 more4 hr
Aug 13, 2:20 AM CDTFlash Flood WarningLIXEast Baton Rouge, East Feliciana, Pointe Coupee, Saint Helena, West Feliciana6 hr
Aug 13, 2:28 AM CDTFlash Flood WarningLIXAscension, East Baton Rouge, Iberville, Livingston, West Baton Rouge6 hr
Aug 13, 4:39 AM CDTSpecial Weather StatementLIXSaint Tammany66 min
Aug 13, 4:46 AM CDTRiver Flood WarningLIXEast Feliciana30 hr
Aug 13, 4:46 AM CDTRiver Flood WarningLIXEast Baton Rouge64 hr
Aug 13, 4:47 AM CDTFlash Flood Warning EmergencyLIXLivingston, Saint Helena, Tangipahoa3 hr
Aug 13, 8:48 AM CDTFlash Flood Warning EmergencyLIXEast Baton Rouge, Livingston3 hr
Aug 13, 8:52 AM CDTRiver Flood WarningLIXAscension7 days
Aug 13, 11:40 AM CDTFlash Flood Warning EmergencyLIXEast Baton Rouge, Livingston3 hr
Aug 13, 2:18 PM CDTFlash Flood WarningLIXAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 5 more8 hr
Aug 13, 2:35 PM CDTFlash Flood Warning EmergencyLIXEast Baton Rouge, Livingston6 hr
Aug 13, 4:07 PM CDTRiver Flood WarningLIXAscension, Livingston9 days

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; the sounding from the Mesonet's radiosonde archive.