Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 69, NWS New Orleans, LA

August 16, 20166 parishes in Louisiana

NWS New Orleans, LA issued this flash flood warning at Aug 16, 2016, 3:29 PM CDT for 6 parishes in Louisiana. It was in force for 3 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 16, 2016, 3:29 PM CDT (20:29 UTC)
Expired
Aug 16, 2016, 6:30 PM CDT
In force
3 hr
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Pointe Coupee Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.5 hours before the alert went out and 150 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 2016-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1926 joules per kilogram.LCLLFCEL10008507005003002001001 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 2016-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.1939Sfc1 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
1926 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
763 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

832 
WGUS54 KLIX 162029
FFWLIX
LAC033-037-047-077-121-125-162330-
/O.NEW.KLIX.FF.W.0069.160816T2029Z-160816T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
329 PM CDT TUE AUG 16 2016

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST BATON ROUGE PARISH IN SOUTHEASTERN LOUISIANA...
  EASTERN WEST FELICIANA PARISH IN SOUTHEASTERN LOUISIANA...
  SOUTHEASTERN POINTE COUPEE PARISH IN SOUTHEASTERN LOUISIANA...
  CENTRAL IBERVILLE PARISH IN SOUTHEASTERN LOUISIANA...
  WESTERN EAST BATON ROUGE PARISH IN SOUTHEASTERN LOUISIANA...
  EAST FELICIANA PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 630 PM CDT

* AT 328 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BATON ROUGE...ZACHARY...BAKER...PLAQUEMINE...PORT ALLEN...
  JACKSON...ST.
  FRANCISVILLE...CLINTON...ADDIS...BRUSLY...SLAUGHTER...WILSON...NORWOOD...
  ERWINVILLE...MERRYDALE...SPILLMAN...BROWNFIELDS AND BATON ROUGE
  AIRPORT.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3099 9100 3099 9131 3055 9144 3021 9126
      3076 9095

$$
1 follow-up statement
927 
WGUS74 KLIX 162219
FFSLIX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
519 PM CDT TUE AUG 16 2016

LAC033-037-047-077-121-125-162228-
/O.CAN.KLIX.FF.W.0069.000000T0000Z-160816T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEST BATON ROUGE LA-WEST FELICIANA LA-POINTE COUPEE LA-IBERVILLE LA-
EAST BATON ROUGE LA-EAST FELICIANA LA-
519 PM CDT TUE AUG 16 2016

...THE FLASH FLOOD WARNING FOR WEST BATON ROUGE...EASTERN WEST
FELICIANA...SOUTHEASTERN POINTE COUPEE...CENTRAL IBERVILLE...WESTERN
EAST BATON ROUGE AND EAST FELICIANA PARISHES IS CANCELLED...

THE HEAVY RAIN HAS ENDED. FLASH FLOODING IS NO LONGER EXPECTED TO
POSE A THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3099 9100 3099 9131 3055 9144 3021 9126
      3076 9095

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 11:59 AM CDTAreal Flood WarningLIXAscension, East Baton Rouge, Iberville, Livingston, Pointe Coupee, Saint James and 2 more27 hr
Aug 16, 12:48 PM CDTSpecial Marine WarningLIX42 min
Aug 16, 1:02 PM CDTSpecial Weather StatementLIXJefferson43 min
Aug 16, 1:05 PM CDTSpecial Weather StatementLIXSaint Tammany40 min
Aug 16, 1:32 PM CDTSpecial Marine WarningLIX43 min
Aug 16, 1:35 PM CDTSpecial Weather StatementLIXLivingston, Saint John the Baptist40 min
Aug 16, 1:39 PM CDTSpecial Marine WarningLIX36 min
Aug 16, 2:12 PM CDTSpecial Weather StatementLIXLivingston63 min
Aug 16, 2:40 PM CDTSpecial Weather StatementLIXSaint Helena65 min
Aug 16, 3:00 PM CDTSpecial Weather StatementLIXWest Baton Rouge30 min
Aug 16, 3:11 PM CDTFlash Flood WarningLIXSaint Helena3 hr
Aug 16, 3:23 PM CDTSpecial Weather StatementLIXWest Baton Rouge, West Feliciana67 min
Aug 16, 4:41 PM CDTSpecial Weather StatementLIXAssumption64 min

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.