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

HEBGEN LAKE (HBRM8)

Lat: 44.66597°NLon: 111.09911°WElev: 6700.0ft.

NA

39°F

4°C

Humidity 88%
Wind Speed W 2 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 25 Dec 02:39 PM MST
Extended Forecast for

West Yellowstone MT

Winter Weather Advisory December 26, 02:00am until December 26, 06:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Christmas Day

    Christmas Day: A chance of rain before 4pm, then a chance of rain and snow. Partly sunny, with a high near 42. South southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 42 °F

    Chance
    Rain/Snow

  • Tonight

    Tonight: Rain and snow likely before 11pm, then snow. Low around 29. South southwest wind around 8 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 29 °F

    Rain/Snow
    Likely then
    Snow

  • Friday

    Friday: Snow, mainly before 3pm. High near 35. Southwest wind 13 to 21 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 35 °F

    Snow

  • Friday Night

    Friday Night: Snow likely. Mostly cloudy, with a low around 17. South southwest wind around 14 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    Low: 17 °F

    Snow Likely

  • Saturday

    Saturday: Snow. High near 25. Southwest wind 10 to 15 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 25 °F

    Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before 11pm. Partly cloudy, with a low around -5. West northwest wind around 6 mph becoming calm in the evening.

    Low: -5 °F

    Slight Chance
    Snow then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 19. Light and variable wind.

    High: 19 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around -1. Calm wind.

    Low: -1 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

Detailed Forecast

Christmas Day
A chance of rain before 4pm, then a chance of rain and snow. Partly sunny, with a high near 42. South southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Tonight
Rain and snow likely before 11pm, then snow. Low around 29. South southwest wind around 8 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Friday
Snow, mainly before 3pm. High near 35. Southwest wind 13 to 21 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Friday Night
Snow likely. Mostly cloudy, with a low around 17. South southwest wind around 14 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Saturday
Snow. High near 25. Southwest wind 10 to 15 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
A 20 percent chance of snow before 11pm. Partly cloudy, with a low around -5. West northwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 19. Light and variable wind.
Sunday Night
Mostly clear, with a low around -1. Calm wind.
Monday
Mostly sunny, with a high near 24.
Monday Night
Partly cloudy, with a low around 5.
Tuesday
Partly sunny, with a high near 30.
Tuesday Night
Mostly cloudy, with a low around 10.
Wednesday
Partly sunny, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 14.
New Year's Day
A slight chance of snow. Mostly cloudy, with a high near 36.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
West Yellowstone MT
 44.67°N 111.09°W (Elev. 6686 ft)
Last Update:
1:27 pm MST Dec 25, 2025
Forecast Valid:
3pm MST Dec 25, 2025-6pm MST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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