Coastal and Marine Impacts from Imelda and Humberto as Both Track Away from the Southeast U.S.

Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine and rip current conditions to the east coast of Florida and Georgia today, spreading north along much of the east coast of the U.S. this week. Heavy rainfall north and west of Imelda falling across coastal Florida and Georgia into the Carolinas could cause isolated flash and urban flooding through Tuesday. Read More >

Current conditions at

Great Falls, Great Falls International Airport (KGTF)

Lat: 47.47333°NLon: 111.38222°WElev: 3675.0ft.

Clear

82°F

28°C

Humidity 24%
Wind Speed SSW 12 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 29 Sep 03:00 PM MDT
Extended Forecast for

Great Falls International Airport MT

  • Tonight

    Tonight: Increasing clouds, with a low around 54. South southeast wind 7 to 9 mph becoming southwest in the evening.

    Low: 54 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 76. Southwest wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 76 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight.  Mostly cloudy, with a low around 49. West southwest wind 5 to 10 mph becoming south in the evening.

    Low: 49 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. South southwest wind 10 to 17 mph, with gusts as high as 28 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight.  Mostly cloudy, with a low around 47. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    Low: 47 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 70. Southwest wind 8 to 13 mph, with gusts as high as 23 mph.

    High: 70 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers.  Mostly cloudy, with a low around 43. Southwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 43 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 66. Southwest wind around 11 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 54. South southeast wind 7 to 9 mph becoming southwest in the evening.
Tuesday
Partly sunny, with a high near 76. Southwest wind 7 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 49. West southwest wind 5 to 10 mph becoming south in the evening.
Wednesday
Mostly sunny, with a high near 73. South southwest wind 10 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 47. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Thursday
Partly sunny, with a high near 70. Southwest wind 8 to 13 mph, with gusts as high as 23 mph.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 43. Southwest wind around 10 mph, with gusts as high as 18 mph.
Friday
Mostly sunny, with a high near 66. Southwest wind around 11 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 37.
Sunday
A chance of showers. Mostly cloudy, with a high near 53.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 32.
Monday
A slight chance of showers. Mostly sunny, with a high near 54.
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ABOUT THIS FORECAST

 
Point Forecast:
Great Falls International Airport MT
 47.49°N 111.37°W (Elev. 3635 ft)
2:10 pm MDT Sep 29, 2025
3pm MDT Sep 29, 2025-6pm MDT Oct 6, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database