Alert archive / Louisiana / Flash Flood Warnings in 2021

Flash Flood Warning 37, NWS Lake Charles, LA

June 21, 2021Allen Parish, Evangeline Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Jun 21, 2021, 7:17 PM CDT for Allen Parish, Evangeline Parish, 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: Jun 21, 2021, 7:17 PM CDT (00:17 UTC)
Expired: Jun 21, 2021, 10:30 PM CDT
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Allen Parish, LA, Evangeline Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.3 hours before the alert went out and 80 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: 1777 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 868 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

817 
WGUS54 KLCH 220017
FFWLCH
LAC003-039-220330-
/O.NEW.KLCH.FF.W.0037.210622T0017Z-210622T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
717 PM CDT Mon Jun 21 2021

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  West Central Evangeline Parish in central Louisiana...
  East Central Allen Parish in southwestern Louisiana...

* Until 1030 PM CDT.

* At 717 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Oberlin, Bond and Allen Parish Airport.

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.

&&

LAT...LON 3077 9260 3074 9245 3061 9248 3061 9260
      3057 9271 3058 9279 3060 9284 3069 9283
      3077 9277

FLASH FLOOD...RADAR INDICATED

$$

Jones

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 7:14 PM CDT	Special Weather Statement	LCH	Evangeline	31 min
Jun 21, 7:59 PM CDT	Special Weather Statement	LCH	Avoyelles	46 min
Jun 22, 6:57 AM CDT	Special Weather Statement	LCH	Allen, Jefferson Davis	33 min
Jun 22, 7:39 AM CDT	Flash Flood Warning	LCH	Acadia, Allen, Beauregard, Evangeline, Jefferson Davis, Saint Landry	2 hr
Jun 22, 10:34 AM CDT	Special Weather Statement	LCH	Vermilion	41 min
Jun 22, 12:28 PM CDT	Special Weather Statement	LCH	St. Mary	47 min
Jun 22, 3:15 PM CDT	Flash Flood Warning	LCH	Calcasieu	3 hr

Nearby

Flash Flood Warnings in Louisiana, 2021 Every flash flood warning in 2021

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.