Alert archive / Louisiana / Flash Flood Warnings in 2026

Flash Flood Warning 49, NWS Lake Charles, LA

June 21, 2026Lafayette Parish, Saint Martin Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Jun 21, 2026, 5:29 AM CDT for Lafayette Parish, Saint Martin Parish, Louisiana. It was in force for 6 hr. 4 reports 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
Jun 21, 2026, 5:29 AM CDT (10:29 UTC)
Expired
Jun 21, 2026, 11:30 AM CDT
In force
6 hr
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Flood severity
None

Counties Lafayette Parish, LA, Saint Martin Parish, LA

The radar

The Lake Charles radar (KLCH), 125 km from the middle of the area, began a volume at 10:29 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

TimeReportWhereRemark
Jun 21, 7:00 AM CDTFLASH FLOOD1 Ene Breaux Bridge, LAReport of water entering St. Martin Hospital in Breaux Bridge.
Jun 21, 7:40 AM CDTFLASH FLOOD2 Se Cecilia, LAStalled vehicles and high water/impassable road ways being reported around St. Martin Parish.
Jun 21, 7:55 AM CDTFLASH FLOOD2 E Lafayette, LADELAYED REPORT. Stream gauge at Surrey Street reports the Vermilion River rapidly rose 3 feet into Minor flood.
Jun 21, 9:23 AM CDTFLASH FLOODBreaux Bridge, LAGrand Pointe Avenue completely flooded. Road closed at HWY 347.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this flash flood warning; the first came 91 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 10.5 hours before the alert went out and 124 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 2026-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2175 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 2026-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.193958Sfc1 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
2175 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
831 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

Open this sounding in Storm Lab

The text

As transmitted.

648 
WGUS54 KLCH 211029
FFWLCH
LAC055-099-211330-
/O.NEW.KLCH.FF.W.0049.260621T1029Z-260621T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
529 AM CDT Sun Jun 21 2026

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Eastern Lafayette Parish in south central Louisiana...
  Northwestern St. Martin Parish in south central Louisiana...

* Until 830 AM CDT.

* At 529 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 3 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...
  Lafayette, Scott, Breaux Bridge, Carencro, Arnaudville, Broussard, 
  Youngsville, Henderson, Cecilia and Parks.

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 3039 9198 3041 9197 3040 9194 3041 9189
      3041 9183 3040 9182 3020 9175 3009 9198
      3021 9214 3037 9200 3037 9199

FLASH FLOOD...RADAR INDICATED

$$

Denson
2 follow-up statements
681 
WGUS54 KLCH 211211
FFWLCH
LAC055-099-211430-
/O.EXT.KLCH.FF.W.0049.000000T0000Z-260621T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
711 AM CDT Sun Jun 21 2026

The National Weather Service in Lake Charles has extended the

* Flash Flood Warning for...
  Eastern Lafayette Parish in south central Louisiana...
  Northwestern St. Martin Parish in south central Louisiana...

* Until 930 AM CDT.

* At 711 AM CDT, the public reported thunderstorms producing heavy 
  rain across the warned area. Between 2 and 5 inches of rain have 
  fallen. Additional rainfall amounts of 1 to 2 inches are possible 
  in the warned area. Flash flooding is already occurring.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Public reported.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Lafayette, Scott, Breaux Bridge, Carencro, Arnaudville, Broussard, 
  Youngsville, Henderson, Cecilia and Parks.

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 3039 9198 3041 9197 3040 9194 3041 9189
      3041 9183 3040 9182 3020 9175 3009 9198
      3021 9214 3037 9200 3037 9199

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Denson
744 
WGUS54 KLCH 211410
FFWLCH
LAC055-099-211630-
/O.EXT.KLCH.FF.W.0049.000000T0000Z-260621T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
910 AM CDT Sun Jun 21 2026

The National Weather Service in Lake Charles has extended the

* Flash Flood Warning for...
  Eastern Lafayette Parish in south central Louisiana...
  Northwestern St. Martin Parish in south central Louisiana...

* Until 1130 AM CDT.

* At 910 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 6 inches of rain 
  have fallen. Additional rainfall amounts of around 1 inch are 
  possible in the warned area. Flash flooding is already occurring.

  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...
  Lafayette, Scott, Breaux Bridge, Carencro, Arnaudville, Broussard, 
  Youngsville, Henderson, Cecilia and Parks.

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 3039 9198 3041 9197 3040 9194 3041 9189
      3041 9183 3040 9182 3020 9175 3009 9198
      3021 9214 3037 9200 3037 9199

FLASH FLOOD...RADAR INDICATED

$$

Tingler

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lake Charles, LA wrote its last area forecast discussion before this flash flood warning went out at Jun 21, 12:38 AM CDT, 4 hours 51 minutes earlier. Its key messages:

  • Slight Risk (level 2 of 4) for flash flooding for lower Southeast Texas and far Southwest Louisiana and a Marginal Risk (level 1 of 4) for most of the area through the early afternoon.
  • Rain chances will start to decrease this evening and will range from 0 to 20 percent the week ahead.
  • Temperatures will start to increase this week with highs in the low to mid 90s.
Area forecast discussion, Jun 21, 12:38 AM CDT, 4 hours 51 minutes before
Area Forecast Discussion
National Weather Service Lake Charles LA
1238 AM CDT Sun Jun 21 2026

...New DISCUSSION, AVIATION, MARINE, FIRE WEATHER...

.KEY MESSAGES...

- Slight Risk (level 2 of 4) for flash flooding for lower
  Southeast Texas and far Southwest Louisiana and a Marginal Risk
  (level 1 of 4) for most of the area through the early
  afternoon.

- Rain chances will start to decrease this evening and will range
  from 0 to 20 percent the week ahead.

- Temperatures will start to increase this week with highs in the
  low to mid 90s.

&&

.DISCUSSION...
(Today through Saturday)
Issued at 1226 AM CDT Sun Jun 21 2026

A stream of Gulf fed moisture filters across across Southeast TX and
Southwest LA today. The coastal trough driving daily convective
showers and storms is showing signs of diminishing toward the
east. After a brief morning round of scattered activity, warming
in the lowest 1km AGL will create a cap decreasing the potential
for further convection. Highs will top out in the low 90s for most
locations while retaining that muggy high humidity.

The column begins to dry out further on Monday locally and likely
warm enough to inhibit convection under some weak subsidence.
Resulting less cloud cover will hedge high temperatures higher in
the lower 90s. Messaging will be pivoting away from flood concerns,
thankfully, to seasonal heat hazards or cautioning at the least.
Given the amount of antecedent rainfall, surfaces will likely carry
high RH during the afternoons amid the upcoming work week. This
will border many interior locations near heat advisory criteria so
outdoor activities should be padded with rest, cooling off, and
hydration.

We continue the warm / relatively drier pattern Tuesday where mid
90s are likely across central Louisiana and interior Southeast
Texas. Winds out of the south will acquire more southwest components
as surface high pressure moving across the SECONUS and broadening
over the central Gulf waters. These hot and dry conditions with
light southerly winds will stay in the forecast through Friday
night. Some of the guidance hints at an upper level trough
developing by the weekend, but this solution is weak and not well
represented in blended guidance or ensembles. That said, outside
of a quick seabreeze or garden variety pop up, rain chances stay
around 10% or less for the extended range.

Kowalski / 30

&&

.AVIATION...
(06Z TAFS)
Issued at 1226 AM CDT Sun Jun 21 2026

Given the amount of surface moisture, and high dewpoints
areas of MVFR conditions will persist overnight while scattered SHRA
and TS attempt to develop along the coast moving north as scattered
clusters. Winds outside of convection will maintain southeast
components through daybreak. Scattered TS possible after sunrise,
but chances decrease through late morning and afternoon and drier
air begins to infiltrate the column.

30

&&

.MARINE...
Issued at 1226 AM CDT Sun Jun 21 2026

The pressure gradient will gradually tighten into Sunday night which
is increase winds. Sunday night into Monday there could be a brief
period where winds reach SCA criteria over a portion of the gulf
waters. Winds will decrease again by Tuesday with a light to
moderate onshore flow anticipated through the remainder of the
week.

&&

.FIRE WEATHER...
Issued at 1226 AM CDT Sun Jun 21 2026

No fire weather concerns through the period. That said, with respect
to rainfall, the pattern is showing signs of a much drier forecast
this coming week with chances of rain under 15% through Friday.

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...None.
TX...None.
GM...None.
&&

PUBLIC/FIRE/MARINE...30
AVIATION...30

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 7:39 AM CDTSpecial Weather StatementLCHEvangeline36 min
Jun 21, 7:57 AM CDTFlash Flood WarningLCHAcadia, Allen, Evangeline, Jefferson Davis3 hr
Jun 21, 8:17 AM CDTRiver Flood WarningLCHLafayette, Vermilion29 hr
Jun 21, 10:51 AM CDTAreal Flood WarningLCHAcadia, Allen, Evangeline, Jefferson Davis3 hr

Nearby

Flash Flood Warnings in Louisiana, 2026Every flash flood warning in 2026

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.