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

10 Miles SW Twisp WA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 24. Light southwest wind.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Snow, mainly after 10am. High near 28. Light and variable wind becoming west 5 to 8 mph in the morning. Winds could gust as high as 18 mph. 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. Wind chill values as low as zero. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 11 °F

    Snow Likely
    then Slight
    Chance Snow

  • Saturday

    Saturday: Sunny, with a high near 19. Wind chill values as low as zero. Northwest wind 6 to 8 mph.

    High: 19 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 9. West wind around 5 mph becoming calm in the evening.

    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 13.

    Low: 13 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny

  • Monday Night

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

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 24. Light southwest wind.
Friday
Snow, mainly after 10am. High near 28. Light and variable wind becoming west 5 to 8 mph in the morning. Winds could gust as high as 18 mph. 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. Wind chill values as low as zero. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Saturday
Sunny, with a high near 19. Wind chill values as low as zero. Northwest wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 9. West wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
Mostly cloudy, with a low around 13.
Monday
Partly sunny, with a high near 25.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Partly sunny, with a high near 30.
Tuesday Night
A 10 percent chance of snow. Mostly cloudy, with a low around 25.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 31.
Wednesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 25.
New Year's Day
A 40 percent chance of snow. Mostly cloudy, with a high near 30.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles SW Twisp WA
 48.28°N 120.29°W (Elev. 4596 ft)
Last Update:
11:57 pm PST Dec 25, 2025
Forecast Valid:
12am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Chance of Precipitation