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 E 0 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 25 Dec 07:06 PM PST
Extended Forecast for

4 Miles W Winthrop WA

  • Tonight

    Tonight: A slight chance of rain, snow, and freezing rain before midnight, then a slight chance of snow between midnight and 1am. Patchy freezing fog before 2am, then patchy freezing fog after 3am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 20%.

    Low: 22 °F

    Slight Chance
    Wintry Mix
    and Patchy
    Freezing Fog

  • Friday

    Friday: Snow, mainly after 7am. Patchy freezing fog between 8am and 9am. High near 30. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 30 °F

    Snow and
    Patchy
    Freezing Fog

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 12. Northwest wind around 5 mph becoming calm in the evening. 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 22. Calm wind.

    High: 22 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 9. Calm wind.

    Low: 9 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 25.

    High: 25 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of rain, snow, and freezing rain before midnight, then a slight chance of snow between midnight and 1am. Patchy freezing fog before 2am, then patchy freezing fog after 3am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 20%.
Friday
Snow, mainly after 7am. Patchy freezing fog between 8am and 9am. High near 30. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 80%. 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 around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
Sunny, with a high near 22. Calm wind.
Saturday Night
Mostly cloudy, with a low around 9. Calm wind.
Sunday
Partly sunny, with a high near 25.
Sunday Night
Mostly cloudy, with a low around 15.
Monday
Mostly cloudy, with a high near 25.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Mostly cloudy, with a high near 30.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 10%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 30. Chance of precipitation is 30%.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
New Year's Day
A 40 percent chance of snow. Partly sunny, with a high near 30.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Winthrop WA
 48.47°N 120.25°W (Elev. 2743 ft)
Last Update:
3:48 pm PST Dec 25, 2025
Forecast Valid:
7pm PST Dec 25, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Chance of Precipitation