Alert archive / Texas / Flash Flood Warnings in 2017

Flash Flood Warning 39, NWS Lake Charles, LA

June 25, 2017Jefferson County, Orange County, Texas

NWS Lake Charles, LA issued this flash flood warning at Jun 25, 2017, 9:38 PM CDT for Jefferson County, Orange County, Texas. It was in force for 112 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: Jun 25, 2017, 9:38 PM CDT (02:38 UTC)
Expired: Jun 25, 2017, 11:30 PM CDT
In force: 112 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Jefferson County, TX, Orange County, TX

The radar

The Lake Charles radar (KLCH), 76 km from the middle of the area, began a volume at 02:39 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, 2.6 hours before the alert went out and 77 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: 1594 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 928 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

372 
WGUS54 KLCH 260238
FFWLCH
TXC245-361-260430-
/O.NEW.KLCH.FF.W.0039.170626T0238Z-170626T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
938 PM CDT SUN JUN 25 2017

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Central Jefferson County in southeastern Texas...
  Southern Orange County in southeastern Texas...

* Until 1130 PM CDT

* At 936 PM CDT, Doppler radar indicated a cluster of thunderstorms 
  producing heavy rain across the warned area moving west at 15 mph. 
  Up to two inches of rain have already fallen. Flash flooding is 
  expected to begin shortly.

* Some locations that will experience flooding include...
  Port Arthur, Nederland, Groves, Port Neches, Bridge City, 
  Hamshire, Central Gardens, Fannett, La Belle, Port Acres and 
  Southeast Texas Regional Airport.

Additional rainfall amounts of 1 to 2 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.

&&

LAT...LON 3004 9433 3005 9373 2999 9377 2998 9383
      2999 9386 2997 9384 2996 9387 2993 9386
      2986 9393 2984 9392 2985 9394 2984 9395
      2982 9394 2983 9392 2981 9393 2981 9395
      2980 9394 2980 9393 2979 9394 2971 9433

$$

MM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 5:50 PM CDT	Flash Flood Warning	LCH	Hardin	115 min

Nearby

Flash Flood Warnings in Texas, 2017 Every flash flood warning in 2017

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.