Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 92, NWS Lake Charles, LA

August 16, 20164 parishes in Louisiana

NWS Lake Charles, LA issued this flash flood warning at Aug 16, 2016, 11:56 PM CDT for 4 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, 11:56 PM CDT (04:56 UTC)
Expired: Aug 17, 2016, 3:00 AM CDT
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Iberia Parish, LA, Lafayette Parish, LA, Saint Martin Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 119 km from the middle of the area, began a volume at 04:59 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 00:00Z, 4.9 hours before the alert went out and 117 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: 848 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

425 
WGUS54 KLCH 170456
FFWLCH
LAC045-055-099-113-170800-
/O.NEW.KLCH.FF.W.0092.160817T0456Z-160817T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1156 PM CDT TUE AUG 16 2016

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

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

* UNTIL 300 AM CDT

* AT 1153 PM CDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. 1 TO 4 INCHES OF RAIN HAVE FALLEN OVER THE PAST
  COUPLE OF HOURS...ESPECIALLY BETWEEN BREAUX BRIDGE AND ST.
  MARTINVILLE. FLASH FLOODING IS OCCURRING ARE EXPECTED TO BEGIN
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LAFAYETTE...NEW IBERIA...ABBEVILLE...SCOTT...BREAUX BRIDGE...
  CARENCRO...ST. MARTINVILLE...AVERY ISLAND...BROUSSARD...
  YOUNGSVILLE...ERATH...DELCAMBRE...HENDERSON...LOREAUVILLE...
  CECILIA...COTEAU...ACADIANA REGIONAL AIRPORT...HENRY...
  CADE AND LYDIA.

ADDITIONAL RAINFALL AMOUNTS OF 1 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.

&&

LAT...LON 2982 9207 3009 9211 3014 9214 3020 9212
      3026 9212 3028 9210 3032 9210 3038 9204
      3036 9203 3037 9201 3037 9199 3039 9198
      3041 9187 3039 9181 3039 9175 3006 9168
      2987 9173

$$

RUA

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 8:35 PM CDT	River Flood Warning	LCH	Allen	5 days
Aug 16, 9:58 PM CDT	Flash Flood Warning	LCH	Saint Martin	2 hr
Aug 16, 10:35 PM CDT	Flash Flood Warning	LCH	Acadia, Lafayette, Vermilion	55 min
Aug 17, 12:57 AM CDT	Flash Flood Warning	LCH	Iberia, Saint Martin, St. Mary	2 hr
Aug 17, 12:41 PM CDT	Flash Flood Warning	LCH	Acadia, Iberia, Lafayette, Saint Martin, St. Mary, Vermilion	2 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.