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 >

Current conditions at

Gary Cooper Bridge I-15 MP 242 (MTYEP)

Lat: 47.13948°NLon: 111.85908°WElev: 3427.0ft.

NA

27°F

-3°C

Humidity 82%
Wind Speed NNE 5 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Wind Chill21°F (-6°C)
Last update 24 Dec 10:45 AM MST
Extended Forecast for

4 Miles WSW Cascade MT

  • Today

    Today: Mostly sunny, with a high near 34. South wind around 10 mph, with gusts as high as 18 mph.

    High: 34 °F

    Mostly Sunny

  • Tonight

    Tonight: Rain, snow, and freezing rain before 3am, then rain likely, possibly mixed with snow. Steady temperature around 26. Southwest wind 7 to 10 mph becoming northeast in the evening. Chance of precipitation is 80%. Little or no ice accumulation expected. Little or no snow accumulation expected.

    Low: 26 °F

    Wintry Mix

  • Christmas Day

    Christmas Day: A chance of rain and snow before 8am, then a chance of rain between 8am and 11am. Mostly sunny, with a high near 45. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 45 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 36. South southwest wind 13 to 18 mph, with gusts as high as 24 mph.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 44. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 34 mph.

    High: 44 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 10. Breezy, with a southwest wind 22 to 29 mph, with gusts as high as 40 mph. Little or no snow accumulation expected.

    Low: 10 °F

    Chance Snow
    and Breezy

  • Saturday

    Saturday: A 30 percent chance of snow before 11am. Partly sunny, with a high near 24. Blustery, with a west northwest wind 20 to 25 mph becoming north 10 to 15 mph in the morning. Winds could gust as high as 34 mph. Little or no snow accumulation expected.

    High: 24 °F

    Chance Snow
    and Blustery
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 10. North northeast wind 7 to 11 mph becoming south southwest in the evening.

    Low: 10 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 34. South wind around 10 mph, with gusts as high as 18 mph.
Tonight
Rain, snow, and freezing rain before 3am, then rain likely, possibly mixed with snow. Steady temperature around 26. Southwest wind 7 to 10 mph becoming northeast in the evening. Chance of precipitation is 80%. Little or no ice accumulation expected. Little or no snow accumulation expected.
Christmas Day
A chance of rain and snow before 8am, then a chance of rain between 8am and 11am. Mostly sunny, with a high near 45. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Thursday Night
Mostly cloudy, with a low around 36. South southwest wind 13 to 18 mph, with gusts as high as 24 mph.
Friday
Partly sunny, with a high near 44. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 34 mph.
Friday Night
A 40 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 10. Breezy, with a southwest wind 22 to 29 mph, with gusts as high as 40 mph. Little or no snow accumulation expected.
Saturday
A 30 percent chance of snow before 11am. Partly sunny, with a high near 24. Blustery, with a west northwest wind 20 to 25 mph becoming north 10 to 15 mph in the morning. Winds could gust as high as 34 mph. Little or no snow accumulation expected.
Saturday Night
Partly cloudy, with a low around 10. North northeast wind 7 to 11 mph becoming south southwest in the evening.
Sunday
Partly sunny, with a high near 34.
Sunday Night
Partly cloudy, with a low around 26. Breezy.
Monday
Partly sunny, with a high near 42. Breezy.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 46. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Cascade MT
 47.24°N 111.79°W (Elev. 4747 ft)
Last Update:
9:22 am MST Dec 24, 2025
Forecast Valid:
11am MST Dec 24, 2025-6pm MST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation