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

MOCCASIN (MSCM8)

Lat: 47.05818°NLon: 109.95082°WElev: 4256.0ft.

NA

27°F

-3°C

Humidity 91%
Wind Speed NNW 3 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Last update 24 Dec 07:00 PM MST
Extended Forecast for

3 Miles WNW Windham MT

Dense Fog Advisory December 24, 09:20pm until December 24, 11:00pm
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory December 24, 09:20pm until December 24, 11:00pm

    NOW until 11:00pm Wed

    Dense Fog Advisory

  • Tonight

    Low: 37 °F

    Mostly Cloudy

  • Christmas Day

    Christmas Day: Mostly sunny, with a high near 53. West southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 35. South southwest wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 49. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 34 mph.

    High: 49 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 15. West southwest wind 15 to 18 mph, with gusts as high as 28 mph.

    Low: 15 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 22. Northwest wind 18 to 20 mph, with gusts as high as 30 mph.

    High: 22 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1. Northwest wind 7 to 14 mph becoming west southwest after midnight. Winds could gust as high as 22 mph.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 34. Southwest wind 6 to 8 mph.

    High: 34 °F

    Sunny

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 37. South southeast wind around 10 mph becoming west southwest after midnight.
Christmas Day
Mostly sunny, with a high near 53. West southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 35. South southwest wind 10 to 14 mph, with gusts as high as 25 mph.
Friday
Partly sunny, with a high near 49. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 34 mph.
Friday Night
Partly cloudy, with a low around 15. West southwest wind 15 to 18 mph, with gusts as high as 28 mph.
Saturday
Partly sunny, with a high near 22. Northwest wind 18 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 1. Northwest wind 7 to 14 mph becoming west southwest after midnight. Winds could gust as high as 22 mph.
Sunday
Sunny, with a high near 34. Southwest wind 6 to 8 mph.
Sunday Night
Partly cloudy, with a low around 21.
Monday
Mostly sunny, with a high near 47.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Windham MT
 47.09°N 110.21°W (Elev. 4600 ft)
Last Update:
9:06 pm MST Dec 24, 2025
Forecast Valid:
9pm MST Dec 24, 2025-6pm MST Dec 31, 2025
 
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Additional Resources

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