Alert archive / Louisiana / Flash Flood Warnings in 2021

Flash Flood Warning 26, NWS Lake Charles, LA

May 17, 2021Lafayette Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at May 17, 2021, 7:01 PM CDT for Lafayette Parish, Louisiana. It was in force for 5 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
May 17, 2021, 7:01 PM CDT (00:01 UTC)
Expired
May 18, 2021, 12:00 AM CDT
In force
5 hr
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Flood severity
None

County Lafayette Parish, LA

The radar

The Lake Charles radar (KLCH), 112 km from the middle of the area, began a volume at 00:05 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, 0.0 hours before the alert went out and 111 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2021-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2021-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -80 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
114 J/kg
Mixed-layer CIN
-166 J/kg
Mixed-layer LCL
1016 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-80 m²/s²
0-3 km storm-relative helicity
-51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

428 
WGUS54 KLCH 180001
FFWLCH
LAC055-180300-
/O.NEW.KLCH.FF.W.0026.210518T0001Z-210518T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
701 PM CDT Mon May 17 2021

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Southeastern Lafayette Parish in south central Louisiana...

* Until 1000 PM CDT.

* At 701 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 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...
  Lafayette, Scott, Broussard, Youngsville, Maurice and Milton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3022 9213 3019 9198 3018 9198 3018 9197
      3018 9196 3018 9195 3013 9193 3007 9201
      3006 9204 3007 9207 3008 9207 3010 9208
      3012 9209 3013 9209 3012 9212 3012 9213
      3013 9218

FLASH FLOOD...RADAR INDICATED

$$

Brazzell
1 follow-up statement
969 
WGUS54 KLCH 180208
FFWLCH
LAC055-180500-
/O.EXT.KLCH.FF.W.0026.000000T0000Z-210518T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
908 PM CDT Mon May 17 2021

The National Weather Service in Lake Charles has extended the

* Flash Flood Warning for...
  Southeastern Lafayette Parish in south central Louisiana...

* Until midnight CDT.

* At 908 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 already occurring.

  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...
  Lafayette, Scott, Broussard, Youngsville, Maurice and Milton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3022 9213 3019 9198 3018 9198 3018 9197
      3018 9196 3018 9195 3013 9193 3007 9201
      3006 9204 3007 9207 3008 9207 3010 9208
      3012 9209 3013 9209 3012 9212 3012 9213
      3013 9218

FLASH FLOOD...RADAR INDICATED

$$

Brazzell

The office that day

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

IssuedProductOfficeCountiesLasted
May 17, 7:18 PM CDTTornado WarningLCHIberia, Lafayette, Saint Martin27 min
May 17, 7:19 PM CDTTornado WarningLCHLafayette, Vermilion26 min
May 17, 7:20 PM CDTFlash Flood WarningLCHVermilion3 hr
May 17, 7:35 PM CDTAreal Flood WarningLCHAcadia, Allen, Calcasieu, Evangeline, Jefferson Davis6 hr
May 17, 7:40 PM CDTSpecial Marine WarningLCH65 min
May 17, 7:46 PM CDTTornado WarningLCHIberia, Vermilion29 min
May 17, 8:22 PM CDTSpecial Weather StatementLCHSaint Martin38 min
May 17, 8:23 PM CDTFlash Flood Warning Considerable damage threatLCHIberia, Lafayette, Saint Martin, Vermilion3 hr
May 17, 8:33 PM CDTRiver Flood WarningLCHLafayette, Saint Landry, Saint Martin8 days
May 17, 8:33 PM CDTRiver Flood WarningLCHBeauregard, Vernon8 days
May 17, 8:33 PM CDTRiver Flood WarningLCHCalcasieu12 days
May 17, 8:33 PM CDTRiver Flood WarningLCHAcadia, Evangeline, Saint Landry5 days
May 17, 8:33 PM CDTRiver Flood WarningLCHAllen, Rapides21 days
May 17, 8:33 PM CDTRiver Flood WarningLCHAcadia, Allen, Evangeline, Jefferson Davis8 days
May 17, 8:33 PM CDTSpecial Marine WarningLCH87 min
May 17, 8:53 PM CDTSpecial Weather StatementLCHSaint Martin, St. Mary52 min
May 17, 9:49 PM CDTSpecial Weather StatementLCHIberia, St. Mary56 min
May 17, 9:54 PM CDTSpecial Marine WarningLCH96 min
May 17, 11:08 PM CDTAreal Flood WarningLCHVermilion3 hr
May 17, 11:44 PM CDTAreal Flood WarningLCHIberia, Lafayette, Saint Martin, Vermilion3 hr
May 18, 12:24 AM CDTSpecial Marine WarningLCH66 min
May 18, 1:40 AM CDTAreal Flood WarningLCHAcadia, Calcasieu, Jefferson Davis5 hr
May 18, 1:48 AM CDTSmall Craft AdvisoryLCH5 days
May 18, 2:25 AM CDTAreal Flood WarningLCHIberia, Lafayette, Saint Landry, Saint Martin, Vermilion6 hr
May 18, 2:25 AM CDTSpecial Marine WarningLCH50 min
May 18, 7:00 AM CDTAreal Flood WarningLCHCalcasieu, Jefferson Davis3 hr
May 18, 7:54 AM CDTAreal Flood WarningLCHIberia, Lafayette, Saint Martin, Vermilion2 hr
May 18, 9:47 AM CDTSpecial Marine WarningLCH58 min
May 18, 11:06 AM CDTRiver Flood WarningLCHAllen, Beauregard21 days
May 18, 11:56 AM CDTRiver Flood WarningLCHCalcasieu10 days
May 18, 1:25 PM CDTSpecial Marine WarningLCH65 min
May 18, 1:42 PM CDTCoastal Flood AdvisoryLCHCameron8 hr
May 18, 1:57 PM CDTWind AdvisoryLCHCameron, Saint Martin14 hr

Nearby

Flash Flood Warnings in Louisiana, 2021Every 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.