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

YELLOW MULE (YLWM8)

Lat: 45.1661°NLon: 111.35954°WElev: 9200.0ft.

NA

29°F

-2°C

Humidity 62%
Wind Speed S 26 MPH
Barometer NA
Dewpoint 17°F (-8°C)
Visibility NA
Wind Chill14°F (-10°C)
Last update 25 Dec 04:04 PM MST
Extended Forecast for

14 Miles S Big Sky 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 20 percent chance of snow before 5pm. Partly sunny, with a steady temperature around 39. South wind around 11 mph, with gusts as high as 28 mph.

    High: 39 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Snow likely, mainly after 1am. Mostly cloudy, with a low around 30. South wind around 11 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 30 °F

    Snow Likely

  • Friday

    Friday: Snow, mainly before noon. Temperature rising to near 35 by noon, then falling to around 26 during the remainder of the day. Breezy, with a southwest wind 16 to 24 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 35 °F⇓

    Breezy. Snow
    then Chance
    Snow

  • Friday Night

    Friday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 17. South wind around 11 mph, with gusts as high as 31 mph. New snow accumulation of less than one inch possible.

    Low: 17 °F

    Chance Snow

  • Saturday

    Saturday: Snow. High near 24. West wind around 10 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 24 °F

    Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 0. West northwest wind around 6 mph becoming calm in the evening.

    Low: 0 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 21. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 21 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 2. Light south wind.

    Low: 2 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 29.

    High: 29 °F

    Sunny

Detailed Forecast

Christmas Day
A 20 percent chance of snow before 5pm. Partly sunny, with a steady temperature around 39. South wind around 11 mph, with gusts as high as 28 mph.
Tonight
Snow likely, mainly after 1am. Mostly cloudy, with a low around 30. South wind around 11 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Friday
Snow, mainly before noon. Temperature rising to near 35 by noon, then falling to around 26 during the remainder of the day. Breezy, with a southwest wind 16 to 24 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 17. South wind around 11 mph, with gusts as high as 31 mph. New snow accumulation of less than one inch possible.
Saturday
Snow. High near 24. West wind around 10 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Saturday Night
A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 0. West northwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 21. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 2. Light south wind.
Monday
Sunny, with a high near 29.
Monday Night
Partly cloudy, with a low around 11.
Tuesday
Partly sunny, with a high near 33.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Partly sunny, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 19.
New Year's Day
A slight chance of snow. Mostly cloudy, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles S Big Sky MT
 45.06°N 111.28°W (Elev. 6998 ft)
Last Update:
3:52 pm MST Dec 25, 2025
Forecast Valid:
4pm MST Dec 25, 2025-6pm MST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation