Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 30, NWS Lake Charles, LA

April 20, 2016Allen Parish, Jefferson Davis Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Apr 20, 2016, 2:45 PM CDT for Allen Parish, Jefferson Davis Parish, Louisiana. It was in force for 3 hr. 1 report 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: Apr 20, 2016, 2:45 PM CDT (19:45 UTC)
Expired: Apr 20, 2016, 5:45 PM CDT
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Allen Parish, LA, Jefferson Davis Parish, LA

The radar

The Lake Charles radar (KLCH), 47 km from the middle of the area, began a volume at 19:46 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
Apr 20, 3:00 PM CDT	FLASH FLOOD	4 E Reeves, LA	ALLEN PARISH 911 REPORTS 190 CLOSED BETWEEN REEVES AND KINDER DUE TO FLOODING

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 12:00Z, 7.8 hours before the alert went out and 46 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: 1053 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

344 
WGUS54 KLCH 201945
FFWLCH
LAC003-053-202245-
/O.NEW.KLCH.FF.W.0030.160420T1945Z-160420T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
245 PM CDT WED APR 20 2016

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN ALLEN PARISH IN SOUTHWESTERN LOUISIANA...
  NORTHWESTERN JEFFERSON DAVIS PARISH IN SOUTHWESTERN LOUISIANA...

* UNTIL 545 PM CDT

* AT 244 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...
  REEVES...LEBLANC AND BULLER. 

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3058 9294 3038 9294 3038 9307 3058 9310

$$

06

1 follow-up statement

528 
WGUS74 KLCH 202230
FFSLCH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
530 PM CDT WED APR 20 2016

LAC003-053-202245-
/O.CON.KLCH.FF.W.0030.000000T0000Z-160420T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEN LA-JEFFERSON DAVIS LA-
530 PM CDT WED APR 20 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
SOUTHWESTERN ALLEN AND NORTHWESTERN JEFFERSON DAVIS PARISHES...

AT 528 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA HAS ENDED. THREE TO SIX INCHES OF
RAIN FELL ACROSS THE AREA, HOWEVER THE STORMS THAT PRODUCED THE
HEAVY RAIN HAVE MOVED EAST. FLOODING THAT IS OCCURRING WILL
GRADUALLY RECEDE THROUGH THE NEXT FEW HOURS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
REEVES...LEBLANC AND BULLER. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3058 9294 3038 9294 3038 9307 3058 9310

$$

TINGLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 4:01 AM CDT	Flash Flood Watch	LCH	Allen, Avoyelles, Beauregard, Cameron, Evangeline, Lafayette and 4 more	38 hr
Apr 20, 9:41 AM CDT	Areal Flood Advisory	LCH	Calcasieu	3 hr
Apr 20, 1:26 PM CDT	Special Weather Statement	LCH	Vernon	49 min
Apr 20, 1:33 PM CDT	Special Weather Statement	LCH	Beauregard	57 min
Apr 20, 2:13 PM CDT	Flash Flood Warning	LCH	Beauregard	3 hr
Apr 20, 2:29 PM CDT	Flash Flood Warning	LCH	Calcasieu	3 hr
Apr 20, 2:49 PM CDT	Special Weather Statement	LCH	Calcasieu	41 min
Apr 20, 2:59 PM CDT	Special Marine Warning	LCH		61 min
Apr 20, 3:19 PM CDT	Flash Flood Warning	LCH	Calcasieu	3 hr
Apr 20, 4:24 PM CDT	Special Weather Statement	LCH	Acadia, Lafayette	66 min
Apr 20, 4:28 PM CDT	Areal Flood Advisory	LCH	Evangeline, Saint Landry	3 hr
Apr 20, 5:16 PM CDT	Areal Flood Advisory	LCH	Acadia, Lafayette, Saint Landry, Saint Martin	4 hr
Apr 20, 5:32 PM CDT	Special Weather Statement	LCH	Lafayette, Saint Martin	43 min
Apr 20, 5:52 PM CDT	Flash Flood Warning	LCH	Lafayette, Saint Martin	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; radar from the NEXRAD Level II archive.