Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 94, NWS Lake Charles, LA

August 17, 20166 parishes in Louisiana

NWS Lake Charles, LA issued this flash flood warning at Aug 17, 2016, 12:41 PM CDT for 6 parishes in Louisiana. It was in force for 2 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 17, 2016, 12:41 PM CDT (17:41 UTC)
Expired
Aug 17, 2016, 2:45 PM CDT
In force
2 hr
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Flood severity
None

Counties Acadia Parish, LA, Iberia Parish, LA, Lafayette Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 127 km from the middle of the area, began a volume at 17:40 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.7 hours before the alert went out and 125 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, Lake Charles Mun, LA at 12:00Z on 2016-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 954 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, Lake Charles Mun, LA at 12:00Z on 2016-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
954 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
827 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

105 
WGUS54 KLCH 171741
FFWLCH
LAC001-045-055-099-101-113-171945-
/O.NEW.KLCH.FF.W.0094.160817T1741Z-160817T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1241 PM CDT WED AUG 17 2016

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN VERMILION PARISH IN SOUTHWESTERN LOUISIANA...
  WEST CENTRAL ST. MARTIN PARISH IN SOUTH CENTRAL LOUISIANA...
  NORTHWESTERN IBERIA PARISH IN SOUTH CENTRAL LOUISIANA...
  NORTHWESTERN ST. MARY PARISH IN SOUTH CENTRAL LOUISIANA...
  EAST CENTRAL ACADIA PARISH IN SOUTHWESTERN LOUISIANA...
  LAFAYETTE PARISH IN SOUTH CENTRAL LOUISIANA...

* UNTIL 245 PM CDT

* AT 1239 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED. ONE
  TO THREE INCHES OF ADDITIONAL RAINFALL IS EXPECTED WITH THESE
  STORMS THROUGH THE AFTERNOON.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LAFAYETTE...NEW IBERIA...ABBEVILLE...SCOTT...BREAUX BRIDGE...
  RAYNE...FRANKLIN...CARENCRO...ST. MARTINVILLE...JEANERETTE...
  AVERY ISLAND...BROUSSARD...YOUNGSVILLE...BALDWIN...ERATH...
  DELCAMBRE...DUSON...MAURICE...LOREAUVILLE AND COTEAU.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2975 9150 2979 9182 2980 9182 2980 9185
      2981 9182 2983 9183 2984 9188 2981 9192
      2983 9197 2982 9199 2982 9202 3033 9230
      3034 9216 3030 9214 3035 9208 3037 9186

$$

24
1 follow-up statement
566 
WGUS74 KLCH 171941
FFSLCH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
241 PM CDT WED AUG 17 2016

LAC001-045-055-099-101-113-171949-
/O.EXP.KLCH.FF.W.0094.000000T0000Z-160817T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VERMILION LA-ST. MARTIN LA-IBERIA LA-ST. MARY LA-ACADIA LA-
LAFAYETTE LA-
241 PM CDT WED AUG 17 2016

...THE FLASH FLOOD WARNING FOR NORTHEASTERN VERMILION...WEST CENTRAL
ST. MARTIN...NORTHWESTERN IBERIA...NORTHWESTERN ST. MARY...EAST
CENTRAL ACADIA AND LAFAYETTE PARISHES WILL EXPIRE AT 245 PM CDT...

SHOWERS AND THUNDERSTORMS HAVE DECREASED ACROSS THE AREA...WITH
HEAVY RAIN COMING TO AN END. THEREFORE FLASH FLOODING IS NO LONGER
EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY REMAINING
ROAD CLOSURES.

LAT...LON 2975 9150 2979 9182 2980 9182 2980 9185
      2981 9182 2983 9183 2984 9188 2981 9192
      2983 9197 2982 9199 2982 9202 3033 9230
      3034 9216 3030 9214 3035 9208 3037 9186

$$

24

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 16, 8:35 PM CDTRiver Flood WarningLCHAllen5 days
Aug 16, 9:58 PM CDTFlash Flood WarningLCHSaint Martin2 hr
Aug 16, 10:35 PM CDTFlash Flood WarningLCHAcadia, Lafayette, Vermilion55 min
Aug 16, 11:56 PM CDTFlash Flood WarningLCHIberia, Lafayette, Saint Martin, Vermilion3 hr
Aug 17, 12:57 AM CDTFlash Flood WarningLCHIberia, Saint Martin, St. Mary2 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.