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

31°F

-1°C

Humidity 100%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 26 Dec 12:06 AM PST
Extended Forecast for

Winthrop WA

  • Overnight

    Overnight: Patchy freezing fog. Mostly cloudy, with a steady temperature around 26. Calm wind.

    Low: 26 °F

    Patchy
    Freezing Fog

  • Friday

    Friday: Snow likely, mainly after 10am. Patchy freezing fog before 10am. Mostly cloudy, with a high near 32. Calm wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 32 °F

    Snow Likely
    and Patchy
    Freezing Fog

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 12. Northwest wind 3 to 5 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 12 °F

    Snow Likely
    then Slight
    Chance Snow

  • Saturday

    Saturday: Sunny, with a high near 23. Light northwest wind.

    High: 23 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 10. Calm wind.

    Low: 10 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 26.

    High: 26 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 26.

    High: 26 °F

    Mostly Cloudy

  • Monday Night

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

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Patchy freezing fog. Mostly cloudy, with a steady temperature around 26. Calm wind.
Friday
Snow likely, mainly after 10am. Patchy freezing fog before 10am. Mostly cloudy, with a high near 32. Calm wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 12. Northwest wind 3 to 5 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
Sunny, with a high near 23. Light northwest wind.
Saturday Night
Mostly cloudy, with a low around 10. Calm wind.
Sunday
Partly sunny, with a high near 26.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
Mostly cloudy, with a high near 26.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Mostly cloudy, with a high near 31.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 31. Chance of precipitation is 30%.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.
New Year's Day
A chance of rain and snow. Partly sunny, with a high near 31. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop WA
 48.48°N 120.19°W (Elev. 1801 ft)
Last Update:
11:57 pm PST Dec 25, 2025
Forecast Valid:
1am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Chance of Precipitation