National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

NCSB (NCSW1)

Lat: 48.42528°NLon: 120.14194°WElev: 1697.0ft.

NA

35°F

2°C

Humidity 98%
Wind Speed N 1 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 09 Dec 10:06 PM PST
Extended Forecast for

13 Miles SW Twisp WA

  • Tonight

    Tonight: Rain and snow. The rain and snow could be heavy at times. Temperature rising to around 32 by 3am. West wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 10 to 14 inches possible.

    Low: 26 °F⇑

    Heavy Snow
    then
    Rain/Snow

  • Wednesday

    Wednesday: Snow, possibly mixed with rain, becoming all snow after 1pm. The rain and snow could be heavy at times. High near 34. Windy, with a west wind 28 to 31 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.

    High: 34 °F

    Rain/Snow and
    Windy

  • Wednesday Night

    Wednesday Night: Snow. The snow could be heavy at times. Low around 25. Windy, with a west wind 21 to 30 mph, with gusts as high as 48 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.

    Low: 25 °F

    Heavy Snow
    and Windy

  • Thursday

    Thursday: Snow likely, mainly before 10am. Mostly cloudy, with a high near 27. Windy, with a west wind 21 to 26 mph decreasing to 15 to 20 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 27 °F

    Snow Likely
    and Windy

  • Thursday Night

    Thursday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 23. West wind around 11 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Chance Snow

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 29. New snow accumulation of less than a half inch possible.

    High: 29 °F

    Chance Snow

  • Friday Night

    Friday Night: A 40 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 25. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Chance Snow

  • Saturday

    Saturday: A 30 percent chance of snow, mainly after 10am. Partly sunny, with a high near 26.

    High: 26 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Snow

Detailed Forecast

Tonight
Rain and snow. The rain and snow could be heavy at times. Temperature rising to around 32 by 3am. West wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 10 to 14 inches possible.
Wednesday
Snow, possibly mixed with rain, becoming all snow after 1pm. The rain and snow could be heavy at times. High near 34. Windy, with a west wind 28 to 31 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.
Wednesday Night
Snow. The snow could be heavy at times. Low around 25. Windy, with a west wind 21 to 30 mph, with gusts as high as 48 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.
Thursday
Snow likely, mainly before 10am. Mostly cloudy, with a high near 27. Windy, with a west wind 21 to 26 mph decreasing to 15 to 20 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 23. West wind around 11 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 29. New snow accumulation of less than a half inch possible.
Friday Night
A 40 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 25. New snow accumulation of less than a half inch possible.
Saturday
A 30 percent chance of snow, mainly after 10am. Partly sunny, with a high near 26.
Saturday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 23.
Sunday
Snow likely, mainly after 10am. Mostly cloudy, with a high near 26. Chance of precipitation is 60%.
Sunday Night
Snow likely. Mostly cloudy, with a low around 22. Chance of precipitation is 60%.
Monday
Snow. The snow could be heavy at times. High near 24. Chance of precipitation is 80%.
Monday Night
Snow. The snow could be heavy at times. Low around 22. Chance of precipitation is 90%.
Tuesday
Snow likely. Mostly cloudy, with a high near 25. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
13 Miles SW Twisp WA
 48.23°N 120.34°W (Elev. 7201 ft)
Last Update:
5:48 pm PST Dec 9, 2025
Forecast Valid:
10pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation