Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 101, NWS Lake Charles, LA

December 3, 2016Calcasieu Parish, Cameron Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Dec 3, 2016, 7:02 PM CST for Calcasieu Parish, Cameron Parish, Louisiana. It was in force for 3 hr. 4 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: Dec 3, 2016, 7:02 PM CST (01:02 UTC)
Expired: Dec 3, 2016, 10:00 PM CST
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Calcasieu Parish, LA, Cameron Parish, LA

The radar

The Lake Charles radar (KLCH), 20 km from the middle of the area, began a volume at 01:05 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.

What was reported inside it

Time	Report	Where	Remark
Dec 3, 7:14 PM CST	FLASH FLOOD	Sulphur, LA	REPORT OF WATER IN RESIDENTIAL HOUSE.
Dec 3, 7:41 PM CST	FLASH FLOOD	Sulphur, LA	BROADCAST MEDIA REPORT OF HOME TAKING IN WATER ON BREAUX LANE.
Dec 3, 8:30 PM CST	FLASH FLOOD	Johnsons Bayou, LA	HWY 82 MILE MARKER 20 AT JOHNSONS BAYOU HAS WATER COVERING ROADWAY.
Dec 3, 9:48 PM CST	FLASH FLOOD	Sulphur, LA	LOTS OF FLOODING BETWEEN HWY 90 AND BURTON. SEVERAL HOMES AND STREET FLOODED.

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

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.0 hours before the alert went out and 21 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 417 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 464 m²/s²
0-3 km storm-relative helicity: 670 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

055 
WGUS54 KLCH 040102
FFWLCH
LAC019-023-040400-
/O.NEW.KLCH.FF.W.0101.161204T0102Z-161204T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
702 PM CST SAT DEC 3 2016

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CAMERON PARISH IN SOUTHWESTERN LOUISIANA...
  CALCASIEU PARISH IN SOUTHWESTERN LOUISIANA...

* UNTIL 1000 PM CST

* AT 700 PM CST...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. 2 TO 5 INCHES OF RAIN HAS
  ALREADY FALLEN IN THE WARNED AREA TODAY. FLASH FLOODING IS
  EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LAKE CHARLES...SULPHUR...CAMERON...WESTLAKE...VINTON...IOWA...MOSS
  BLUFF...LAKE CHARLES REGIONAL AIRPORT...STARKS...SABINE NATIONAL
  WILDLIFE...DE QUINCY...JOHNSONS BAYOU...HAYES...GRAND LAKE...
  DEQUINCY...GILLIS...GIBBSTOWN...HOLMWOOD...BUHLER AND HACKETTS
  CORNER.

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 2980 9391 2985 9379 3014 9369 3029 9371
      3039 9376 3040 9349 3049 9349 3049 9339
      3040 9338 3037 9304 3016 9300 3014 9292
      3009 9291 3009 9300 2995 9299 2976 9312
      2977 9334 2980 9334 2974 9375 2970 9384

$$

06

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 3, 6:15 PM CST	Special Marine Warning	LCH		60 min
Dec 3, 6:18 PM CST	Areal Flood Advisory	LCH	Calcasieu, Cameron	117 min
Dec 3, 7:46 PM CST	Special Marine Warning	LCH		59 min
Dec 3, 8:05 PM CST	Areal Flood Advisory	LCH	Allen, Beauregard, Jefferson Davis	115 min
Dec 3, 9:04 PM CST	Special Marine Warning	LCH		116 min
Dec 3, 9:07 PM CST	Areal Flood Advisory	LCH	Allen, Cameron, Jefferson Davis	113 min
Dec 3, 9:12 PM CST	River Flood Warning	LCH	Allen	5 days
Dec 3, 9:12 PM CST	River Flood Warning	LCH	Allen, Jefferson Davis	7 days
Dec 3, 9:44 PM CST	Special Weather Statement	LCH	Acadia, Lafayette	61 min
Dec 3, 9:47 PM CST	Special Weather Statement	LCH	Vermilion	58 min
Dec 3, 11:12 PM CST	Special Weather Statement	LCH	Lafayette, Saint Landry, Vermilion	63 min
Dec 4, 12:42 AM CST	Areal Flood Advisory	LCH	Iberia, Lafayette, Saint Martin, Vermilion	2 hr
Dec 4, 1:32 AM CST	Special Weather Statement	LCH	Saint Martin	28 min
Dec 4, 3:18 AM CST	Small Craft Advisory	LCH		33 hr
Dec 4, 6:55 AM CST	River Flood Warning	LCH	Lafayette, Vermilion	4 days
Dec 4, 10:12 AM CST	River Flood Warning	LCH	Acadia, Evangeline, Saint Landry	71 hr
Dec 4, 10:12 AM CST	River Flood Warning	LCH	Calcasieu	47 hr
Dec 4, 10:12 AM CST	River Flood Warning	LCH	Calcasieu	4 days

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; radar from the NEXRAD Level II archive.