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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Great Falls, Great Falls International Airport (KGTF)

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

Mist

23°F

-5°C

Humidity 92%
Wind Speed NE 8 MPH
Barometer 29.79 in (1008.81 mb)
Dewpoint 21°F (-6°C)
Visibility 1.75 mi
Wind Chill14°F (-10°C)
Last update 24 Dec 03:20 PM MST
Extended Forecast for

Great Falls International Airport MT

Winter Weather Advisory December 24, 07:00pm until December 25, 05:00am
Dense Fog Advisory until December 24, 11:00pm
Click here for hazard details and duration
Winter Weather Advisory
Dense Fog Advisory
  •  
    Dense Fog Advisory until December 24, 11:00pm

    NOW until 11:00pm Wed

    Dense Fog Advisory

  • This Afternoon

    High: 22 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a temperature rising to around 27 by 5am. East northeast wind 6 to 8 mph becoming south southwest after midnight.

    Low: 19 °F⇑

    Mostly Cloudy

  • Christmas Day

    Christmas Day: Mostly sunny, with a high near 50. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 50 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. South southwest wind 10 to 14 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 47. Southwest wind 14 to 21 mph, with gusts as high as 32 mph.

    High: 47 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 10. Southwest wind 16 to 18 mph, with gusts as high as 29 mph.

    Low: 10 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 16. West wind 13 to 21 mph becoming north northwest in the morning. Winds could gust as high as 30 mph.

    High: 16 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 0. Northwest wind 6 to 9 mph becoming south southwest after midnight.

    Low: 0 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Partly sunny, with a steady temperature around 22. East northeast wind around 10 mph.
Tonight
Mostly cloudy, with a temperature rising to around 27 by 5am. East northeast wind 6 to 8 mph becoming south southwest after midnight.
Christmas Day
Mostly sunny, with a high near 50. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 33. South southwest wind 10 to 14 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 47. Southwest wind 14 to 21 mph, with gusts as high as 32 mph.
Friday Night
Mostly cloudy, with a low around 10. Southwest wind 16 to 18 mph, with gusts as high as 29 mph.
Saturday
Mostly cloudy, with a high near 16. West wind 13 to 21 mph becoming north northwest in the morning. Winds could gust as high as 30 mph.
Saturday Night
Partly cloudy, with a low around 0. Northwest wind 6 to 9 mph becoming south southwest after midnight.
Sunday
Sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 21.
Monday
Mostly sunny, with a high near 43.
Monday Night
Partly cloudy, with a low around 28.
Tuesday
Partly sunny, with a high near 46.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
Partly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Great Falls International Airport MT
 47.46°N 111.4°W (Elev. 3599 ft)
Last Update:
2:22 pm MST Dec 24, 2025
Forecast Valid:
3pm MST Dec 24, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation