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 94%
Wind Speed SE 1 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 09 Dec 06:06 PM PST
Extended Forecast for

11 Miles NNE Mazama WA

  • Tonight

    Tonight: Snow before 4am, then rain and snow. The snow could be heavy at times.  Temperature falling to near 23 by 9pm, then rising to around 33 during the remainder of the night. South wind 9 to 15 mph becoming west after midnight. Winds could gust as high as 24 mph.  Chance of precipitation is 100%. Total nighttime snow accumulation of 8 to 12 inches possible.

    Low: 23 °F

    Heavy Snow
    then
    Rain/Snow

  • Wednesday

    Wednesday: Snow, possibly mixed with rain, becoming all snow after 8am. The snow could be heavy at times.  High near 33. West wind 8 to 11 mph.  Chance of precipitation is 100%. New snow accumulation of 9 to 13 inches possible.

    High: 33 °F

    Rain/Snow
    then Heavy
    Snow

  • Wednesday Night

    Wednesday Night: Snow. The snow could be heavy at times.  Low around 25. Breezy, with a west wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 33 mph.  Chance of precipitation is 90%. New snow accumulation of 6 to 10 inches possible.

    Low: 25 °F

    Heavy Snow
    and Breezy

  • Thursday

    Thursday: Snow likely, mainly before 10am.  Partly sunny, with a high near 28. West wind 11 to 14 mph, with gusts as high as 23 mph.  Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 28 °F

    Snow Likely
    then Chance
    Snow

  • Thursday Night

    Thursday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 24. Northwest wind around 10 mph.  New snow accumulation of less than a half inch possible.

    Low: 24 °F

    Chance Snow

  • Friday

    Friday: Snow likely.  Mostly cloudy, with a high near 29. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    High: 29 °F

    Snow Likely

  • Friday Night

    Friday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 25. New snow accumulation of less than one inch possible.

    Low: 25 °F

    Chance Snow

  • Saturday

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

    High: 26 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 25.

    Low: 25 °F

    Chance Snow

Detailed Forecast

Tonight
Snow before 4am, then rain and snow. The snow could be heavy at times. Temperature falling to near 23 by 9pm, then rising to around 33 during the remainder of the night. South wind 9 to 15 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 8 to 12 inches possible.
Wednesday
Snow, possibly mixed with rain, becoming all snow after 8am. The snow could be heavy at times. High near 33. West wind 8 to 11 mph. Chance of precipitation is 100%. New snow accumulation of 9 to 13 inches possible.
Wednesday Night
Snow. The snow could be heavy at times. Low around 25. Breezy, with a west wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of 6 to 10 inches possible.
Thursday
Snow likely, mainly before 10am. Partly sunny, with a high near 28. West wind 11 to 14 mph, with gusts as high as 23 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 24. Northwest wind around 10 mph. New snow accumulation of less than a half inch possible.
Friday
Snow likely. Mostly cloudy, with a high near 29. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 25. New snow accumulation of less than one inch possible.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 26.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 25.
Sunday
Snow likely. Mostly cloudy, with a high near 26. Chance of precipitation is 60%.
Sunday Night
Snow likely. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.
Monday
Snow. The snow could be heavy at times. High near 27. Chance of precipitation is 80%.
Monday Night
Snow. The snow could be heavy at times. Low around 24. 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:
11 Miles NNE Mazama WA
 48.76°N 120.33°W (Elev. 6581 ft)
5:48 pm PST Dec 9, 2025
6pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
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Additional Resources

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