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 ENE 1 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 25 Dec 06:06 AM PST
Extended Forecast for

Winthrop WA

  • Christmas Day

    Christmas Day: Snow likely before 11am, then rain and snow. High near 31. Calm wind. Chance of precipitation is 80%. Total daytime snow accumulation of less than a half inch possible.

    High: 31 °F

    Rain/Snow

  • Tonight

    Tonight: Rain and snow likely before midnight, then a slight chance of rain between midnight and 1am. Cloudy, then gradually becoming partly cloudy, with a low around 24. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 24 °F

    Rain/Snow
    Likely then
    Slight Chance
    Rain

  • Friday

    Friday: Snow likely, mainly between 10am and 4pm. Mostly cloudy, with a high near 30. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 30 °F

    Snow Likely

  • Friday Night

    Friday Night: A 50 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 15. Northwest wind 3 to 6 mph. New snow accumulation of less than a half inch possible.

    Low: 15 °F

    Chance Snow
    then Slight
    Chance Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 31. Light northwest wind.

    High: 31 °F

    Mostly 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 32.

    High: 32 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 32.

    High: 32 °F

    Mostly Cloudy

Detailed Forecast

Christmas Day
Snow likely before 11am, then rain and snow. High near 31. Calm wind. Chance of precipitation is 80%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Rain and snow likely before midnight, then a slight chance of rain between midnight and 1am. Cloudy, then gradually becoming partly cloudy, with a low around 24. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow likely, mainly between 10am and 4pm. Mostly cloudy, with a high near 30. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
A 50 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 15. Northwest wind 3 to 6 mph. New snow accumulation of less than a half inch possible.
Saturday
Mostly sunny, with a high near 31. Light northwest wind.
Saturday Night
Mostly cloudy, with a low around 13.
Sunday
Partly sunny, with a high near 32.
Sunday Night
Mostly cloudy, with a low around 17.
Monday
Mostly cloudy, with a high near 32.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
Mostly cloudy, with a high near 35.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
A slight chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop WA
 48.48°N 120.19°W (Elev. 1801 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