Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 32, NWS Lake Charles, LA

April 20, 2016Lafayette Parish, Saint Martin Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Apr 20, 2016, 5:52 PM CDT for Lafayette Parish, Saint Martin Parish, Louisiana. It was in force for 3 hr. 2 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: Apr 20, 2016, 5:52 PM CDT (22:52 UTC)
Expired: Apr 20, 2016, 8:45 PM CDT
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Lafayette Parish, LA, Saint Martin Parish, LA

The radar

The Lake Charles radar (KLCH), 118 km from the middle of the area, began a volume at 22:53 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, 6:05 PM CDT	FLASH FLOOD	4 Sw Lafayette, LA	PUBLIC POSTED PHOTO OF FLOODING AT AMBASSADOR PKWY AND JOHNSTON ST
Apr 20, 6:54 PM CDT	FLASH FLOOD	2 Wsw Lafayette, LA	MEDIA POSTED PHOTO OF WATER ENTERING HIGH SCHOOL AUDITORIUM FROM OUTSIDE OF THE BUILDING

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, 10.9 hours before the alert went out and 116 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.

056 
WGUS54 KLCH 202252
FFWLCH
LAC055-099-210145-
/O.NEW.KLCH.FF.W.0032.160420T2252Z-160421T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL ST. MARTIN PARISH IN SOUTH CENTRAL LOUISIANA...
  EASTERN LAFAYETTE PARISH IN SOUTH CENTRAL LOUISIANA...

* UNTIL 845 PM CDT

* AT 551 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. ONE TO THREE INCHES OF RAIN
  HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LAFAYETTE...SCOTT...BREAUX BRIDGE...CARENCRO...ST. MARTINVILLE...
  BROUSSARD...YOUNGSVILLE...CADE...PARKS AND MILTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3006 9183 3007 9190 3007 9195 3008 9207
      3012 9209 3013 9209 3012 9212 3012 9214
      3031 9210 3031 9179

$$

TINGLER

1 follow-up statement

431 
WGUS74 KLCH 210055
FFSLCH

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

LAC055-099-210145-
/O.CON.KLCH.FF.W.0032.000000T0000Z-160421T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ST. MARTIN LA-LAFAYETTE LA-
755 PM CDT WED APR 20 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM CDT FOR
WEST CENTRAL ST. MARTIN AND EASTERN LAFAYETTE PARISHES...

AT 752 PM CDT...DOPPLER RADAR INDICATED THE THUNDERSTORMS THAT
PRODUCED THE HEAVIEST RAIN HAVE EXITED THE AREA, HOWEVER LIGHT TO
MODERATE RAIN CONTINUES. ONE TO FOUR INCHES OF RAIN FELL AROUND THE
LAFAYETTE METRO AREA AND THE FLOOD WATERS WILL SLOWLY DRAIN OVER THE
NEXT FEW HOURS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LAFAYETTE...SCOTT...BREAUX BRIDGE...CARENCRO...ST. MARTINVILLE...
BROUSSARD...YOUNGSVILLE...CADE...PARKS AND MILTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 3006 9183 3007 9190 3007 9195 3008 9207
      3012 9209 3013 9209 3012 9212 3012 9214
      3031 9210 3031 9179

$$

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, 2:45 PM CDT	Flash Flood Warning	LCH	Allen, Jefferson Davis	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

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.