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Sulphur, Louisianna 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Sulphur LA
National Weather Service Forecast for: Sulphur LA
Issued by: National Weather Service Lake Charles, LA
Updated: 7:46 am CDT Jul 26, 2025
 
Today

Today: Showers and thunderstorms likely, mainly before 3pm. Some of the storms could produce heavy rainfall.  Partly sunny, with a high near 89. Heat index values as high as 98. South wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Heavy Rain

Tonight

Tonight: A 30 percent chance of showers and thunderstorms before 7pm.  Partly cloudy, with a low around 77. South wind around 5 mph becoming calm  in the evening.
Chance
T-storms then
Partly Cloudy
Sunday

Sunday: Showers and thunderstorms likely, mainly between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm.  Mostly sunny, with a high near 92. Heat index values as high as 103. Calm wind becoming southeast around 5 mph in the morning.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
T-storms
Likely
Sunday
Night
Sunday Night: A chance of thunderstorms before 7pm.  Mostly clear, with a low around 76. South wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%.
Chance
T-storms then
Mostly Clear
Monday

Monday: Sunny, with a high near 95. Calm wind.
Sunny

Monday
Night
Monday Night: Clear, with a low around 76. South wind around 5 mph becoming calm.
Clear

Tuesday

Tuesday: Sunny and hot, with a high near 98. Northwest wind around 5 mph becoming calm.
Hot

Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 77. Calm wind.
Partly Cloudy

Wednesday

Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 96. Northwest wind around 5 mph becoming calm  in the afternoon.
Chance
T-storms

Hi 89 °F Lo 77 °F Hi 92 °F Lo 76 °F Hi 95 °F Lo 76 °F Hi 98 °F Lo 77 °F Hi 96 °F

 

Today
 
Showers and thunderstorms likely, mainly before 3pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 89. Heat index values as high as 98. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 77. South wind around 5 mph becoming calm in the evening.
Sunday
 
Showers and thunderstorms likely, mainly between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly sunny, with a high near 92. Heat index values as high as 103. Calm wind becoming southeast around 5 mph in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
 
A chance of thunderstorms before 7pm. Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Monday
 
Sunny, with a high near 95. Calm wind.
Monday Night
 
Clear, with a low around 76. South wind around 5 mph becoming calm.
Tuesday
 
Sunny and hot, with a high near 98. Northwest wind around 5 mph becoming calm.
Tuesday Night
 
Partly cloudy, with a low around 77. Calm wind.
Wednesday
 
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 96. Northwest wind around 5 mph becoming calm in the afternoon.
Wednesday Night
 
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 76.
Thursday
 
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.
Thursday Night
 
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Friday
 
Showers and thunderstorms likely. Mostly sunny, with a high near 92. Chance of precipitation is 70%.

 

Forecast from NOAA-NWS for Sulphur LA.

Weather Forecast Discussion
806
FXUS64 KLCH 261134
AFDLCH

Area Forecast Discussion
National Weather Service Lake Charles LA
634 AM CDT Sat Jul 26 2025

...New AVIATION...

.KEY MESSAGES...

- scattered showers and thunderstorms, some with torrential
  rainfall, frequent lightning and gusty winds, possible again
  today.

- Marginal risk of excessive rain for portions of the area today.
  Expect highest totals along and south of I-10.

- Another heat wave develops rapidly Monday into Wednesday of next
  week.

&&

.SHORT TERM...
(Today through Monday night)
Issued at 1200 AM CDT Sat Jul 26 2025

Tropical wave is moving into southeast Texas at this hour. Weakness
will remain near enough to the region today to allow for another
round of scattered to numerous convective activity this afternoon.
High pressure starts to rebuild aloft into Sunday and Monday,
bringing a gradual close of daytime rain chances through the
remainder of the short term period.

High pressure and dry air building back into the region will also
bring about clearing skies and warming temperatures during daytime
hours. Highs will return to the mid 90s Sunday and upper 90s Monday.
Even though daytime dewpoints should be on the way down to start the
work week, remnant moisture evaporating from the ground may result
in localized humid/steamy conditions. Thus, max Heat Indices in the
105 to 110F range could be possible to start the work week.

11/Calhoun

&&

.LONG TERM...
(Tuesday through Saturday)
Issued at 1200 AM CDT Sat Jul 26 2025

Ridging aloft struggles to hold on into the midweek. High pressure
slides into central Texas where it broadens out and weakness over
the region develops. In response to falling heights, a return to
typical diurnal summer daytime PoPs will develop from east to west,
maybe by Tuesday but definitely by Wednesday for central and
southwest Louisiana.
Perhaps due to the localized convection, some guidance develops a
lowering of pressure in the northeast Gulf. This feature does not
appear to take on any tropical wave features and should only be a
disturbed area of convection moving near the region until high
pressure develops once again by the weekend.

11/Calhoun

&&

.AVIATION...
(12Z TAFS)
Issued at 626 AM CDT Sat Jul 26 2025

Nocturnals carried on overnight, with convection increasing in
coverage this morning as it spreads inland across SETX and W LA.
Terminals directly impacted by this activity could see periods of
reduced VIS from heavy rain, gusty winds, and frequent lightning.
We will see this activity continue into the evening hours before
tapering, with more quiet overnight conditions.

&&

.MARINE...
Issued at 1200 AM CDT Sat Jul 26 2025

Tropical wave is moving near the northeast Gulf and is beginning to
move into east Texas. Winds over the waters are seeing some
localized enhancement with the trof, thus the Small Craft Advisory
will continue until 7 AM today. Winds and seas will diminish
thereafter and will remain low for the forecast period.

Weakness remaining near the region will allow for the development of
overnight scattered to numerous thunderstorms this morning and again
Sunday morning. High pressure builds in into Monday decreasing rain
chances to start the work week.&&

.FIRE WEATHER...
Issued at 1200 AM CDT Sat Jul 26 2025

Tropical wave is moving into east Texas. Its proximity to the region
combined with latent tropical moisture should feed another round of
scattered to numerous showers and thunderstorms in the region. Rain
chances continue on Sunday, but are lower as the feature dissipates.
High pressure begins building in late Sunday into Monday, further
pausing rain chances and bringing about hot and dry, albeit humid,
conditions to the forecast.

&&

.FIRE WEATHER...
Issued at 1200 AM CDT Sat Jul 26 2025

Tropical wave is moving into east Texas. Its proximity to the region
combined with latent tropical moisture should feed another round of
scattered to numerous showers and thunderstorms in the region. Rain
chances continue on Sunday, but are lower as the feature dissipates.
High pressure begins building in late Sunday into Monday, further
pausing rain chances and bringing about hot and dry, albeit humid,
conditions to the forecast.

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  91  73  96  74 /  50  10  30   0
LCH  89  78  92  76 /  50  10  50   0
LFT  89  76  92  75 /  60  10  40   0
BPT  88  77  92  75 /  70  10  50   0

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...None.
TX...None.
GM...Small Craft Advisory until 7 AM CDT this morning for GMZ432-435-
     436-452-455-472-475.

&&

$$

SHORT TERM...11
LONG TERM....11
AVIATION...87
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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