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

NCSB (NCSW1)

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

NA

32°F

0°C

Humidity 95%
Wind Speed NW 3 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 25 Dec 03:06 PM PST
Extended Forecast for

Mazama WA

  • Christmas Day

    Christmas Day: Rain, possibly mixed with snow. High near 32. Calm wind. Chance of precipitation is 90%. Total daytime snow accumulation of less than a half inch possible.

    High: 32 °F

    Rain/Snow

  • Tonight

    Tonight: Rain, possibly mixed with snow, mainly before 7pm. Low around 21. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Rain/Snow
    then Slight
    Chance
    Rain/Snow

  • Friday

    Friday: Snow, mainly after 10am. High near 31. Light and variable 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 10. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 10 °F

    Snow then
    Chance Snow

  • Saturday

    Saturday: Sunny, with a high near 20. Calm wind.

    High: 20 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 28.

    High: 28 °F

    Mostly Cloudy

Detailed Forecast

Christmas Day
Rain, possibly mixed with snow. High near 32. Calm wind. Chance of precipitation is 90%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Rain, possibly mixed with snow, mainly before 7pm. Low around 21. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Friday
Snow, mainly after 10am. High near 31. Light and variable wind. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Friday Night
Snow, mainly before 10pm. Low around 10. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday
Sunny, with a high near 20. Calm wind.
Saturday Night
Partly cloudy, with a low around 10.
Sunday
Partly sunny, with a high near 27.
Sunday Night
Mostly cloudy, with a low around 18.
Monday
Mostly cloudy, with a high near 28.
Monday Night
Mostly cloudy, with a low around 21.
Tuesday
Partly sunny, with a high near 33.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 32. Chance of precipitation is 40%.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 25. Chance of precipitation is 50%.
New Year's Day
A chance of rain and snow. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mazama WA
 48.59°N 120.45°W (Elev. 2349 ft)
Last Update:
1:11 pm PST Dec 25, 2025
Forecast Valid:
3pm PST Dec 25, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation