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

27°F

-3°C

Humidity 100%
Wind Speed N 1 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Last update 25 Dec 07:06 AM PST
Extended Forecast for

23 Miles N Mazama WA

  • Christmas Day

    Christmas Day: Snow, mainly after 1pm. High near 32. Southeast wind around 7 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.

    High: 32 °F

    Chance Snow
    then Snow

  • Tonight

    Tonight: Snow before 1am, then a slight chance of snow after 4am. Low around 22. South wind around 7 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 22 °F

    Snow then
    Chance Snow

  • Friday

    Friday: Snow, mainly after 7am. High near 29. South wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 29 °F

    Snow

  • Friday Night

    Friday Night: Snow, mainly before 10pm. Low around 4. Wind chill values as low as -6. Northwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 4 °F

    Snow then
    Chance Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 14. North wind around 6 mph.

    High: 14 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 8.

    Low: 8 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 26.

    High: 26 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 10 percent chance of snow after 4am. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday

    Monday: A 20 percent chance of snow before 10am. Mostly cloudy, with a high near 34.

    High: 34 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Christmas Day
Snow, mainly after 1pm. High near 32. Southeast wind around 7 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.
Tonight
Snow before 1am, then a slight chance of snow after 4am. Low around 22. South wind around 7 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Friday
Snow, mainly after 7am. High near 29. South wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Friday Night
Snow, mainly before 10pm. Low around 4. Wind chill values as low as -6. Northwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Saturday
Mostly sunny, with a high near 14. North wind around 6 mph.
Saturday Night
Mostly cloudy, with a low around 8.
Sunday
Partly sunny, with a high near 26.
Sunday Night
A 10 percent chance of snow after 4am. Mostly cloudy, with a low around 18.
Monday
A 20 percent chance of snow before 10am. Mostly cloudy, with a high near 34.
Monday Night
Mostly cloudy, with a low around 24.
Tuesday
A 10 percent chance of rain. Mostly cloudy, with a high near 37.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 20%.
Wednesday
A 40 percent chance of snow. Mostly cloudy, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
23 Miles N Mazama WA
 48.95°N 120.48°W (Elev. 5246 ft)
Last Update:
2:17 am PST Dec 25, 2025
Forecast Valid:
7am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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Chance of Precipitation