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

LIBBY (LBBM8)

Lat: 48.40361°NLon: 115.53917°WElev: 2070.0ft.

NA

38°F

3°C

Humidity 100%
Wind Speed SSE 0 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 25 Dec 01:25 PM MST
Extended Forecast for

18 Miles SW Fortine MT

Winter Weather Advisory December 26, 12:00pm until December 27, 05:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Christmas Day

    Christmas Day: A slight chance of snow before 3pm, then a chance of rain and snow. Mostly cloudy, with a high near 35. South southwest wind 3 to 5 mph. Chance of precipitation is 40%. Total daytime snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance
    Rain/Snow

  • Tonight

    Tonight: Snow, mainly before 9pm. Low around 29. South southwest wind 6 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Snow then
    Mostly Cloudy

  • Friday

    Friday: Snow, mainly before 4pm. The snow could be heavy at times. High near 31. South southwest wind 6 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 31 °F

    Heavy Snow

  • Friday Night

    Friday Night: Snow. Patchy blowing snow between 8pm and 2am. Low around 17. Southwest wind 15 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 17 °F

    Snow and
    Patchy
    Blowing Snow

  • Saturday

    Saturday: A 50 percent chance of snow, mainly before 11am. Mostly cloudy, with a high near 21. Southwest wind 6 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. New snow accumulation of less than one inch possible.

    High: 21 °F

    Chance Snow
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 7.

    Low: 7 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 17.

    High: 17 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 13.

    Low: 13 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 22.

    High: 22 °F

    Mostly Cloudy

Detailed Forecast

Christmas Day
A slight chance of snow before 3pm, then a chance of rain and snow. Mostly cloudy, with a high near 35. South southwest wind 3 to 5 mph. Chance of precipitation is 40%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow, mainly before 9pm. Low around 29. South southwest wind 6 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Friday
Snow, mainly before 4pm. The snow could be heavy at times. High near 31. South southwest wind 6 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Friday Night
Snow. Patchy blowing snow between 8pm and 2am. Low around 17. Southwest wind 15 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Saturday
A 50 percent chance of snow, mainly before 11am. Mostly cloudy, with a high near 21. Southwest wind 6 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. New snow accumulation of less than one inch possible.
Saturday Night
Mostly cloudy, with a low around 7.
Sunday
Partly sunny, with a high near 17.
Sunday Night
Mostly cloudy, with a low around 13.
Monday
Mostly cloudy, with a high near 22.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Mostly cloudy, with a high near 26.
Tuesday Night
Mostly cloudy, with a low around 22.
Wednesday
A chance of snow. Mostly cloudy, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
18 Miles SW Fortine MT
 48.58°N 115.15°W (Elev. 5600 ft)
Last Update:
1:01 pm MST Dec 25, 2025
Forecast Valid:
1pm MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation