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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Hazardous Weather Conditions

Current conditions at

NCSB (NCSW1)

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

NA

10°F

-12°C

Humidity 88%
Wind Speed NNW 2 MPH
Barometer NA
Dewpoint 7°F (-14°C)
Visibility NA
Last update 01 Jan 06:06 AM PST
Extended Forecast for

4 Miles SSW Twisp WA

Air Stagnation Advisory until January 1, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory until January 1, 12:00pm

    NOW until 12:00pm Thu

    Air Stagnation Advisory

  • New Year's Day

    High: 30 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: A 50 percent chance of snow. Mostly cloudy, with a low around 25. Calm wind. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Chance Snow

  • Friday

    Friday: A 40 percent chance of snow. Mostly cloudy, with a high near 29. Calm wind. New snow accumulation of less than a half inch possible.

    High: 29 °F

    Chance Snow

  • Friday Night

    Friday Night: Snow likely, mainly after 4am. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Snow Likely

  • Saturday

    Saturday: Snow likely before 10am, then rain, possibly mixed with snow. High near 32. Light and variable wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 32 °F

    Rain/Snow

  • Saturday Night

    Saturday Night: Rain likely, possibly mixed with snow, becoming all snow after 10pm. Mostly cloudy, with a low around 31. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Sunday

    Sunday: Snow likely, mainly before 10am. Mostly cloudy, with a high near 33. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

Detailed Forecast

New Year's Day
A 20 percent chance of snow after 10am. Mostly cloudy, with a high near 30. Calm wind.
Tonight
A 50 percent chance of snow. Mostly cloudy, with a low around 25. Calm wind. New snow accumulation of less than a half inch possible.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 29. Calm wind. New snow accumulation of less than a half inch possible.
Friday Night
Snow likely, mainly after 4am. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
Snow likely before 10am, then rain, possibly mixed with snow. High near 32. Light and variable wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Saturday Night
Rain likely, possibly mixed with snow, becoming all snow after 10pm. Mostly cloudy, with a low around 31. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday
Snow likely, mainly before 10am. Mostly cloudy, with a high near 33. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
A 30 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 27.
Monday
A 30 percent chance of snow, mainly between 10am and 4pm. Partly sunny, with a high near 32.
Monday Night
A 20 percent chance of snow before 10pm. Partly cloudy, with a low around 24.
Tuesday
A 30 percent chance of snow. Partly sunny, with a high near 32.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 26.
Wednesday
A 50 percent chance of snow. Partly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Twisp WA
 48.31°N 120.17°W (Elev. 4193 ft)
Last Update:
2:53 am PST Jan 1, 2026
Forecast Valid:
6am PST Jan 1, 2026-6pm PST Jan 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation