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 92%
Wind Speed NW 1 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 25 Dec 01:06 PM PST
Extended Forecast for

11 Miles WSW Twisp WA

  • Christmas Day

    Christmas Day: Snow. High near 29. Calm wind. Chance of precipitation is 90%. Total daytime snow accumulation of 1 to 2 inches possible.

    High: 29 °F

    Snow

  • Tonight

    Tonight: Snow likely, mainly before 7pm. Mostly cloudy, with a low around 20. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Snow Likely
    then Slight
    Chance Snow

  • Friday

    Friday: Snow, mainly after 7am. High near 28. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 28 °F

    Snow

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 11. Northwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Low: 11 °F

    Snow Likely
    then Slight
    Chance Snow

  • Saturday

    Saturday: Sunny, with a high near 18. Northwest wind around 6 mph.

    High: 18 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 12.

    Low: 12 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 24.

    High: 24 °F

    Partly Sunny

Detailed Forecast

Christmas Day
Snow. High near 29. Calm wind. Chance of precipitation is 90%. Total daytime snow accumulation of 1 to 2 inches possible.
Tonight
Snow likely, mainly before 7pm. Mostly cloudy, with a low around 20. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow, mainly after 7am. High near 28. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 11. Northwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Saturday
Sunny, with a high near 18. Northwest wind around 6 mph.
Saturday Night
Partly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
Mostly cloudy, with a low around 12.
Monday
Partly sunny, with a high near 24.
Monday Night
Mostly cloudy, with a low around 21.
Tuesday
Partly sunny, with a high near 30.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 26.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 31.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles WSW Twisp WA
 48.31°N 120.33°W (Elev. 4390 ft)
Last Update:
1:11 pm PST Dec 25, 2025
Forecast Valid:
2pm PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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