Alert archive / Louisiana / Flash Flood Warnings in 2021

Flash Flood Warning 6, NWS Lake Charles, LA

April 13, 2021Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Apr 13, 2021, 2:47 PM CDT for Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana. It was in force for 4 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: Apr 13, 2021, 2:47 PM CDT (19:47 UTC)
Expired: Apr 13, 2021, 7:00 PM CDT
In force: 4 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Iberia Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.8 hours before the alert went out and 174 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: 2326 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 457 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 184 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 8.9

Open this sounding in Storm Lab

The text

As transmitted.

390 
WGUS54 KLCH 131947
FFWLCH
LAC045-099-101-132145-
/O.NEW.KLCH.FF.W.0006.210413T1947Z-210413T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
247 PM CDT Tue Apr 13 2021

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Central Iberia Parish in south central Louisiana...
  Southeastern St. Martin Parish in south central Louisiana...
  St. Mary Parish in south central Louisiana...

* Until 445 PM CDT.

* At 247 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...
  Morgan City, Franklin, Patterson, Berwick, Burns Point, Bayou 
  Vista, Stephensville, Cypremort Point, Baldwin, Patterson Memorial 
  Airport, Ellerslie, Charenton, Sorrel, Glencoe, Cote Blanche 
  Island, Pierre Part, Amelia, Centerville and Weeks Island.

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 2999 9126 2986 9120 2981 9110 2964 9111
      2963 9108 2959 9122 2954 9127 2947 9127
      2946 9133 2947 9132 2952 9144 2950 9155
      2962 9157 2963 9168 2973 9163 2970 9189
      2975 9190 2982 9185 2980 9192 2983 9196

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

$$

Rua

2 follow-up statements

140 
WGUS54 KLCH 132039
FFWLCH
LAC045-099-101-132230-
/O.EXT.KLCH.FF.W.0006.000000T0000Z-210413T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
339 PM CDT Tue Apr 13 2021

The National Weather Service in Lake Charles has extended the

* Flash Flood Warning for...
  Central Iberia Parish in south central Louisiana...
  Southeastern St. Martin Parish in south central Louisiana...
  St. Mary Parish in south central Louisiana...

* Until 530 PM CDT.

* At 339 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...
  Morgan City, Franklin, Patterson, Berwick, Burns Point, Bayou 
  Vista, Stephensville, Cypremort Point, Baldwin, Patterson Memorial 
  Airport, Ellerslie, Charenton, Sorrel, Glencoe, Cote Blanche 
  Island, Pierre Part, Amelia, Centerville and Weeks Island.

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 2999 9126 2986 9120 2981 9110 2964 9111
      2963 9108 2959 9122 2954 9127 2947 9127
      2946 9133 2947 9132 2952 9144 2950 9155
      2962 9157 2963 9168 2973 9163 2970 9189
      2975 9190 2982 9185 2980 9192 2983 9196

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

$$

Rua

196 
WGUS54 KLCH 132210
FFWLCH
LAC045-099-101-140000-
/O.EXT.KLCH.FF.W.0006.000000T0000Z-210414T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
510 PM CDT Tue Apr 13 2021

The National Weather Service in Lake Charles has extended the

* Flash Flood Warning for...
  Central Iberia Parish in south central Louisiana...
  Southeastern St. Martin Parish in south central Louisiana...
  St. Mary Parish in south central Louisiana...

* Until 700 PM CDT.

* At 510 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across 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...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...
  Morgan City, Franklin, Patterson, Berwick, Burns Point, Bayou 
  Vista, Stephensville, Cypremort Point, Baldwin, Patterson Memorial 
  Airport, Ellerslie, Charenton, Sorrel, Glencoe, Cote Blanche 
  Island, Pierre Part, Amelia, Centerville and Weeks Island.

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 2999 9126 2986 9120 2981 9110 2964 9111
      2963 9108 2959 9122 2954 9127 2947 9127
      2946 9133 2947 9132 2952 9144 2950 9155
      2962 9157 2963 9168 2973 9163 2970 9189
      2975 9190 2982 9185 2980 9192 2983 9196

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

$$

Warthen

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 6:47 AM CDT	Special Weather Statement	LCH	Beauregard	43 min
Apr 13, 7:07 AM CDT	Special Weather Statement	LCH	Allen	38 min
Apr 13, 7:26 AM CDT	Special Weather Statement	LCH	Allen, Beauregard, Evangeline, Vernon	49 min
Apr 13, 8:29 AM CDT	Special Weather Statement	LCH	Evangeline	61 min
Apr 13, 9:10 AM CDT	Special Weather Statement	LCH	Saint Landry	50 min
Apr 13, 10:56 AM CDT	Special Weather Statement	LCH	Acadia	49 min
Apr 13, 11:46 AM CDT	Special Weather Statement	LCH	Lafayette, Saint Martin	44 min
Apr 13, 12:33 PM CDT	Special Weather Statement	LCH	Saint Martin	57 min
Apr 13, 12:53 PM CDT	Flash Flood Warning	LCH	Iberia, Lafayette, Saint Martin, St. Mary, Vermilion	6 hr
Apr 13, 1:09 PM CDT	River Flood Warning	LCH	Lafayette, Saint Martin, Vermilion	18 hr
Apr 13, 1:33 PM CDT	Special Weather Statement	LCH	Saint Martin	57 min
Apr 13, 2:24 PM CDT	Special Weather Statement	LCH	Saint Martin	51 min
Apr 13, 2:55 PM CDT	Special Weather Statement	LCH	St. Mary	65 min
Apr 13, 3:31 PM CDT	Flash Flood Watch	LCH	Allen, Avoyelles, Beauregard, Cameron, Evangeline, Lafayette and 4 more	4 days
Apr 13, 4:33 PM CDT	Special Marine Warning	LCH		27 min
Apr 13, 5:16 PM CDT	Special Marine Warning	LCH		59 min
Apr 13, 5:20 PM CDT	Special Weather Statement	LCH	Lafayette	40 min
Apr 13, 6:49 PM CDT	Special Weather Statement	LCH	Assumption	41 min
Apr 13, 6:53 PM CDT	Special Marine Warning	LCH		67 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.