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

NCSB (NCSW1)

Lat: 48.42528°NLon: 120.14194°WElev: 1697.0ft.

NA

30°F

-1°C

Humidity 94%
Wind Speed NW 4 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill26°F (-3°C)
Last update 25 Dec 12:06 PM PST
Extended Forecast for

5 Miles NW Mazama WA

  • Christmas Day

    Christmas Day: Snow.  High near 32. Calm wind.  Chance of precipitation is 80%. Total daytime snow accumulation of around an inch possible.

    High: 32 °F

    Snow

  • Tonight

    Tonight: Snow likely, mainly before 7pm.  Mostly cloudy, with a low around 26. Calm wind.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 26 °F

    Snow Likely

  • Friday

    Friday: Snow, mainly after 10am.  High near 31. Light south wind.  Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 31 °F

    Snow

  • Friday Night

    Friday Night: Snow, mainly before 10pm.  Low around 15. West wind 3 to 5 mph.  Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 15 °F

    Snow then
    Chance Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 26. Calm wind.

    High: 26 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 36.

    High: 36 °F

    Mostly Cloudy

Detailed Forecast

Christmas Day
Snow. High near 32. Calm wind. Chance of precipitation is 80%. Total daytime snow accumulation of around an inch possible.
Tonight
Snow likely, mainly before 7pm. Mostly cloudy, with a low around 26. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Friday
Snow, mainly after 10am. High near 31. Light south wind. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Friday Night
Snow, mainly before 10pm. Low around 15. West wind 3 to 5 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Saturday
Mostly sunny, with a high near 26. Calm wind.
Saturday Night
Mostly cloudy, with a low around 14.
Sunday
Partly sunny, with a high near 32.
Sunday Night
Mostly cloudy, with a low around 20.
Monday
Mostly cloudy, with a high near 36.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Mostly cloudy, with a high near 39.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 20%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NW Mazama WA
 48.65°N 120.52°W (Elev. 3412 ft)
9:21 am PST Dec 25, 2025
1pm PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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