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

28°F

-2°C

Humidity 100%
Wind Speed NW 0 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 25 Dec 05:06 AM PST
Extended Forecast for

16 Miles NNE Winthrop WA

  • Christmas Day

    Christmas Day: Snow, mainly after 7am. High near 31. Light and variable wind. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.

    High: 31 °F

    Snow

  • Tonight

    Tonight: Snow likely, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 26. Light south wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Snow Likely
    then Slight
    Chance Snow

  • Friday

    Friday: Snow, mainly after 7am. High near 29. South wind 3 to 6 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 29 °F

    Snow

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 13. Northwest wind around 7 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 13 °F

    Snow Likely
    then Slight
    Chance Snow

  • Saturday

    Saturday: Sunny, with a high near 23. Northwest wind around 6 mph.

    High: 23 °F

    Sunny

  • Saturday Night

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

    Low: 13 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 29.

    High: 29 °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 31.

    High: 31 °F

    Mostly Cloudy

Detailed Forecast

Christmas Day
Snow, mainly after 7am. High near 31. Light and variable wind. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.
Tonight
Snow likely, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 26. Light south wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow, mainly after 7am. High near 29. South wind 3 to 6 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 13. Northwest wind around 7 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
Sunny, with a high near 23. Northwest wind around 6 mph.
Saturday Night
Mostly cloudy, with a low around 13.
Sunday
Partly sunny, with a high near 29.
Sunday Night
Mostly cloudy, with a low around 20.
Monday
Mostly cloudy, with a high near 31.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Mostly cloudy, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 34. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles NNE Winthrop WA
 48.7°N 120.09°W (Elev. 3681 ft)
Last Update:
2:17 am PST Dec 25, 2025
Forecast Valid:
6am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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Chance of Precipitation