National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Mostly Cloudy

85°F

29°C

Humidity 73%
Wind Speed S 14 G 21 mph
Barometer 29.87 in
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 17 Jun 9:55 am CDT
Extended Forecast for

Larose LA

Coastal Flood Advisory until June 18, 12:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory until June 18, 12:00am

    NOW until 12:00am Thu

    Coastal Flood Advisory

  • Today

    High: 86 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers and thunderstorms likely after 4am. Low around 79. Breezy, with a south wind 15 to 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 79 °F

    T-storms and
    Breezy

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 3pm. Partly sunny, with a high near 89. Heat index values as high as 106. Breezy, with a south wind 15 to 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    T-storms
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 81. South wind 10 to 15 mph. Chance of precipitation is 30%.

    Low: 81 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91. South wind around 10 mph.

    High: 91 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 79. South wind around 5 mph.

    Low: 79 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Light south wind increasing to 5 to 10 mph in the afternoon.

    High: 90 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 80. South wind around 5 mph.

    Low: 80 °F

    Partly Cloudy

Detailed Forecast

Today
Showers and thunderstorms likely, mainly between 4pm and 5pm. Mostly cloudy, with a high near 86. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers and thunderstorms likely after 4am. Low around 79. Breezy, with a south wind 15 to 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers and thunderstorms likely, mainly before 3pm. Partly sunny, with a high near 89. Heat index values as high as 106. Breezy, with a south wind 15 to 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 81. South wind 10 to 15 mph. Chance of precipitation is 30%.
Juneteenth
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91. South wind around 10 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 79. South wind around 5 mph.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Light south wind increasing to 5 to 10 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 80. South wind around 5 mph.
Sunday
Mostly sunny, with a high near 90. South wind 5 to 15 mph.
Sunday Night
Partly cloudy, with a low around 81. South wind around 10 mph.
Monday
Mostly sunny, with a high near 91. South wind around 10 mph.
Monday Night
Mostly clear, with a low around 79. South wind 5 to 10 mph.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Larose LA
 29.57°N 90.39°W
Last Update:
5:31 am CDT Jun 17, 2026
Forecast Valid:
10am CDT Jun 17, 2026-6pm CDT Jun 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation