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 100%
Wind Speed NW 4 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill28°F (-2°C)
Last update 25 Dec 12:06 AM PST
Extended Forecast for

25 Miles N Mazama WA

  • Overnight

    Overnight: Partly cloudy, with a low around 14. Wind chill values as low as -1. South wind around 15 mph.

    Low: 14 °F

    Partly Cloudy

  • Christmas Day

    Christmas Day: Snow, mainly after 1pm. High near 23. Wind chill values as low as zero. South wind 11 to 14 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 23 °F

    Chance Snow
    then Snow

  • Thursday Night

    Thursday Night: Snow, mainly before 10pm. Low around 18. Breezy, with a west wind 14 to 18 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 18 °F

    Snow then
    Snow Likely
    and Breezy

  • Friday

    Friday: Snow. High near 20. Wind chill values as low as -2. Breezy, with a south wind around 21 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 20 °F

    Snow and
    Breezy

  • Friday Night

    Friday Night: Snow, mainly before 10pm. Low around 0. Breezy, with a northwest wind 17 to 20 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 0 °F

    Snow and
    Breezy then
    Chance Snow
    and Blustery

  • Saturday

    Saturday: Mostly sunny, with a high near 11.

    High: 11 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 4.

    Low: 4 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 19.

    High: 19 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 13.

    Low: 13 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 14. Wind chill values as low as -1. South wind around 15 mph.
Christmas Day
Snow, mainly after 1pm. High near 23. Wind chill values as low as zero. South wind 11 to 14 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Thursday Night
Snow, mainly before 10pm. Low around 18. Breezy, with a west wind 14 to 18 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Friday
Snow. High near 20. Wind chill values as low as -2. Breezy, with a south wind around 21 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Friday Night
Snow, mainly before 10pm. Low around 0. Breezy, with a northwest wind 17 to 20 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Saturday
Mostly sunny, with a high near 11.
Saturday Night
Mostly cloudy, with a low around 4.
Sunday
Mostly cloudy, with a high near 19.
Sunday Night
Mostly cloudy, with a low around 13.
Monday
Mostly cloudy, with a high near 25.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Mostly cloudy, with a high near 30.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 23.
Wednesday
A 30 percent chance of snow. Partly sunny, with a high near 28.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
25 Miles N Mazama WA
 48.98°N 120.4°W (Elev. 7438 ft)
Last Update:
9:17 pm PST Dec 24, 2025
Forecast Valid:
12am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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Chance of Precipitation