Alert archive / Louisiana / Flash Flood Warnings in 2021

Flash Flood Warning 39, NWS Lake Charles, LA

June 22, 2021Calcasieu Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Jun 22, 2021, 3:15 PM CDT for Calcasieu 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 22, 2021, 3:15 PM CDT (20:15 UTC)
Expired: Jun 22, 2021, 5:45 PM CDT
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

County Calcasieu Parish, LA

The radar

The Lake Charles radar (KLCH), 4 km from the middle of the area, began a volume at 20:19 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

Shreveport, LA (KSHV), launched 12:00Z, 8.3 hours before the alert went out and 265 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1238 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

190 
WGUS54 KLCH 222015
FFWLCH
LAC019-222245-
/O.NEW.KLCH.FF.W.0039.210622T2015Z-210622T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
315 PM CDT Tue Jun 22 2021

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Southeastern Calcasieu Parish in southwestern Louisiana...

* Until 545 PM CDT.

* At 315 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 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...
  Lake Charles, Sulphur, Westlake, Iowa, Lake Charles Regional 
  Airport, Moss Bluff, Lebleu Settlement and Holmwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3005 9328 3007 9334 3034 9333 3036 9322
      3037 9322 3037 9304 3026 9303 3005 9301
      3005 9313 3005 9316 3005 9318 3005 9320
      3005 9321 3005 9322

FLASH FLOOD...RADAR INDICATED

$$

Rua

1 follow-up statement

024 
WGUS74 KLCH 222053
FFSLCH

Flash Flood Statement
National Weather Service Lake Charles LA
353 PM CDT Tue Jun 22 2021

LAC019-222245-
/O.CON.KLCH.FF.W.0039.000000T0000Z-210622T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calcasieu LA-
353 PM CDT Tue Jun 22 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM CDT THIS 
AFTERNOON FOR SOUTHEASTERN CALCASIEU PARISH...

At 353 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1 and 2 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...
  Lake Charles, Sulphur, Westlake, Iowa, Lake Charles Regional 
  Airport, Moss Bluff, Lebleu Settlement and Holmwood.

The highest rainfall rates until 5 pm are expected to be in the  
Moss Bluff to LeBleu Settlement areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3005 9328 3007 9334 3034 9333 3036 9322
      3037 9322 3037 9304 3026 9303 3005 9301
      3005 9313 3005 9316 3005 9318 3005 9320
      3005 9321 3005 9322

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR 

$$

Rua

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, 7:17 PM CDT	Flash Flood Warning	LCH	Allen, Evangeline	3 hr
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

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; radar from the NEXRAD Level II archive.