Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 93, NWS Lake Charles, LA

August 17, 2016Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Aug 17, 2016, 12:57 AM CDT for Iberia Parish, Saint Martin Parish, St. Mary Parish, 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, 12:57 AM CDT (05:57 UTC)
Expired: Aug 17, 2016, 3:00 AM CDT
In force: 2 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Iberia Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.0 hours before the alert went out and 157 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.

439 
WGUS54 KLCH 170557
FFWLCH
LAC045-099-101-170800-
/O.NEW.KLCH.FF.W.0093.160817T0557Z-160817T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1257 AM CDT WED AUG 17 2016

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL ST. MARTIN PARISH IN SOUTH CENTRAL LOUISIANA...
  NORTHERN IBERIA PARISH IN SOUTH CENTRAL LOUISIANA...
  ST. MARY PARISH IN SOUTH CENTRAL LOUISIANA...

* UNTIL 300 AM CDT

* AT 1253 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED.
  RADAR IS INDICATING FROM ONE TO THREE INCHES OF RAIN HAS FALLEN IN
  THE LAST THREE HOURS. AN ADDITIONAL TWO TO THREE INCHES SHOULD BE
  EXPECTED AS STORMS TRAIN INTO SOUTH CENTRAL LOUISIANA THIS MORNING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MORGAN CITY...CATAHOULA...FRANKLIN...PATTERSON...JEANERETTE...
  CYPREMORT POINT...BURNS POINT...BALDWIN...CHARENTON...LAKE PELBA...
  COTE BLANCHE ISLAND...PATTERSON MEMORIAL AIRPORT...SORREL...
  ELLERSLIE...LAKE FAUSSE POINTE...GLENCOE...BUTTE LA ROSE...
  WEEKS ISLAND AND CENTERVILLE.

LAT...LON 2954 9152 2964 9156 2963 9165 2976 9161
      2976 9163 2971 9186 2982 9181 2985 9187
      2987 9173 3007 9168 3039 9175 3040 9163
      3026 9159 3023 9148 3010 9147 3010 9139
      3006 9137 2984 9128 2955 9126

$$

K. KUYPER

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 16, 11:56 PM CDT	Flash Flood Warning	LCH	Iberia, Lafayette, Saint Martin, Vermilion	3 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.