Alert archive / Louisiana / Flash Flood Warnings in 2016

Flash Flood Warning 86, NWS Lake Charles, LA

August 15, 2016Jefferson Davis Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Aug 15, 2016, 11:20 AM CDT for Jefferson Davis Parish, Louisiana. It was in force for 55 min. 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 15, 2016, 11:20 AM CDT (16:20 UTC)
Expired: Aug 15, 2016, 12:15 PM CDT
In force: 55 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

County Jefferson Davis Parish, LA

The radar

The Lake Charles radar (KLCH), 56 km from the middle of the area, began a volume at 16:20 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 12:00Z, 4.3 hours before the alert went out and 54 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: 1132 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 803 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

344 
WGUS54 KLCH 151620
FFWLCH
LAC053-151715-
/O.NEW.KLCH.FF.W.0086.160815T1620Z-160815T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1120 AM CDT MON AUG 15 2016

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

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

* UNTIL 1215 PM CDT

* AT 1118 AM CDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. ALTHOUGH RADAR ESTIMATES ONLY ON THE ORDER OF A HALF-
  INCH FALLING IN THE PAST HOUR WITH THIS ACTIVITY...THIS RAINFALL
  HAS THE POTENTIAL TO LEAD TO ADDITIONAL FLASH FLOODING ON TOP
  OF WHAT IS ALREADY OCCURRING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  JENNINGS...PINE ISLAND...HATHAWAY AND ROANOKE. 

ADDITIONAL RAINFALL AMOUNTS OF ONE-HALF INCH ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3044 9283 3044 9263 3032 9263 3031 9262
      3027 9262 3026 9263 3025 9262 3019 9262
      3017 9274

$$

25

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 10:36 PM CDT	Areal Flood Warning	LCH	Acadia, Cameron, Evangeline, Iberia, Jefferson Davis, Lafayette and 3 more	12 hr
Aug 15, 10:27 AM CDT	River Flood Warning	LCH	Allen	5 days
Aug 15, 2:19 PM CDT	Areal Flood Warning	LCH	Acadia, Evangeline, Iberia, Jefferson Davis, Lafayette, Saint Landry and 2 more	5 days
Aug 15, 2:28 PM CDT	Areal Flood Warning	LCH	Cameron	8 days
Aug 15, 5:26 PM CDT	Special Weather Statement	LCH	Rapides	49 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.