Alert archive / Louisiana / Flash Flood Warnings in 2021

Flash Flood Warning 62, NWS Lake Charles, LA

September 28, 2021Calcasieu Parish, Cameron Parish, Jefferson Davis Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Sep 28, 2021, 10:18 AM CDT for Calcasieu Parish, Cameron Parish, Jefferson Davis Parish, Louisiana. It was in force for 4 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 28, 2021, 10:18 AM CDT (15:18 UTC)
Expired: Sep 28, 2021, 2:26 PM CDT
In force: 4 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Calcasieu Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA

The radar

The Lake Charles radar (KLCH), 21 km from the middle of the area, began a volume at 15:19 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.

What was reported inside it

Time	Report	Where	Remark
Sep 28, 12:33 PM CDT	FLASH FLOOD	1 S Lake Charles, LA	PUBLIC REPORTS OF FLOODED STREETS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.3 hours before the alert went out and 23 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: 922 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 830 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -95 m²/s²
0-3 km storm-relative helicity: -188 m²/s²
Significant tornado parameter: -0.3
Supercell composite: -3.3

Open this sounding in Storm Lab

The text

As transmitted.

429 
WGUS54 KLCH 281518
FFWLCH
LAC019-023-053-281830-
/O.NEW.KLCH.FF.W.0062.210928T1518Z-210928T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
1018 AM CDT Tue Sep 28 2021

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Calcasieu Parish in southwestern Louisiana...
  North Central Cameron Parish in southwestern Louisiana...
  Western Jefferson Davis Parish in southwestern Louisiana...

* Until 130 PM CDT.

* At 1018 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. Additional rainfall amounts of 2 to 4 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Lake Charles, Sulphur, Westlake, Vinton, Iowa, Lake Charles 
  Regional Airport, Moss Bluff, Starks, Carlyss, Buhler, Edgerly, 
  Gillis, Lebleu Settlement, Holmwood, Topsy, Hackberry, Lunita, 
  Toomey, Buller and Bell City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3029 9371 3039 9373 3040 9339 3040 9333
      3040 9324 3040 9314 3040 9313 3041 9313
      3042 9298 3004 9294 3003 9294 3004 9367
      3012 9366

FLASH FLOOD...RADAR INDICATED

$$

2 follow-up statements

096 
WGUS54 KLCH 281823
FFWLCH
LAC019-023-053-282000-
/O.EXT.KLCH.FF.W.0062.000000T0000Z-210928T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
123 PM CDT Tue Sep 28 2021

The National Weather Service in Lake Charles has extended the

* Flash Flood Warning for...
  Calcasieu Parish in southwestern Louisiana...
  North Central Cameron Parish in southwestern Louisiana...
  Western Jefferson Davis Parish in southwestern Louisiana...

* Until 300 PM CDT.

* At 123 PM CDT, Doppler radar indicated thunderstorms have ended 
  over much of the area, however heavy rain continues across the 
  southern portions of the warned area. Between 2 and 6 inches of 
  rain have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Lake Charles, Sulphur, Westlake, Vinton, Iowa, Lake Charles 
  Regional Airport, Moss Bluff, Starks, Carlyss, Buhler, Edgerly, 
  Gillis, Lebleu Settlement, Holmwood, Topsy, Hackberry, Lunita, 
  Toomey, Buller and Bell City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3029 9371 3039 9373 3040 9339 3040 9333
      3040 9324 3040 9314 3040 9313 3041 9313
      3042 9298 3004 9294 3003 9294 3004 9367
      3012 9366

FLASH FLOOD...RADAR INDICATED

$$

276 
WGUS74 KLCH 281926
FFSLCH

Flash Flood Statement
National Weather Service Lake Charles LA
226 PM CDT Tue Sep 28 2021

LAC019-023-053-281936-
/O.CAN.KLCH.FF.W.0062.000000T0000Z-210928T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Calcasieu LA-Cameron LA-Jefferson Davis LA-
226 PM CDT Tue Sep 28 2021

...FLASH FLOOD WARNING IS CANCELLED FOR CALCASIEU, NORTH CENTRAL 
CAMERON AND WESTERN JEFFERSON DAVIS PARISHES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3029 9371 3039 9373 3040 9339 3040 9333
      3040 9324 3040 9314 3040 9313 3041 9313
      3042 9298 3004 9294 3003 9294 3004 9367
      3012 9366

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 6:29 AM CDT	Special Weather Statement	LCH	Vernon	61 min
Sep 28, 6:39 AM CDT	Flash Flood Warning	LCH	Vernon	3 hr
Sep 28, 8:41 AM CDT	Flash Flood Warning Considerable damage threat	LCH	Allen, Beauregard, Rapides, Vernon	5 hr
Sep 28, 9:15 AM CDT	Flash Flood Warning	LCH	Allen, Beauregard, Calcasieu	5 hr
Sep 28, 9:43 AM CDT	Flash Flood Warning	LCH	Iberia	2 hr
Sep 28, 10:19 AM CDT	Special Weather Statement	LCH	Calcasieu	26 min
Sep 28, 12:26 PM CDT	Flash Flood Warning	LCH	Acadia, Evangeline, Saint Landry	3 hr
Sep 28, 12:41 PM CDT	River Flood Warning	LCH	Calcasieu	14 days
Sep 28, 2:11 PM CDT	River Flood Warning	LCH	Rapides	43 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.