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

34°F

1°C

Humidity 97%
Wind Speed WNW 1 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 09 Dec 08:06 PM PST
Extended Forecast for

14 Miles NNE Mazama WA

  • Tonight

    Tonight: Snow before 2am, then rain, possibly mixed with snow. The snow could be heavy at times.  Temperature rising to around 35 by 4am. South wind around 10 mph becoming southwest after midnight. Winds could gust as high as 24 mph.  Chance of precipitation is 100%. Total nighttime snow accumulation of 5 to 9 inches possible.

    Low: 28 °F

    Heavy Snow
    then
    Rain/Snow

  • Wednesday

    Wednesday: Rain, possibly mixed with snow.  High near 40. West wind 7 to 10 mph.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow, possibly mixed with rain.  Low around 30. West wind 9 to 15 mph, with gusts as high as 24 mph.  Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 30 °F

    Rain/Snow

  • Thursday

    Thursday: Snow likely, possibly mixed with rain before 10am, then a chance of snow.  Partly sunny, with a high near 35. West wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Thursday Night

    Thursday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 26. Northwest wind around 7 mph.  New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Chance Snow

  • Friday

    Friday: Snow likely before 1pm, then rain likely, possibly mixed with snow.  Mostly cloudy, with a high near 37. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Friday Night

    Friday Night: A chance of rain and snow.  Mostly cloudy, with a low around 27. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Chance
    Rain/Snow

  • Saturday

    Saturday: A chance of rain and snow.  Partly sunny, with a high near 34. Chance of precipitation is 30%.

    High: 34 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A chance of rain and snow.  Mostly cloudy, with a low around 27. Chance of precipitation is 50%.

    Low: 27 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Snow before 2am, then rain, possibly mixed with snow. The snow could be heavy at times. Temperature rising to around 35 by 4am. South wind around 10 mph becoming southwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 5 to 9 inches possible.
Wednesday
Rain, possibly mixed with snow. High near 40. West wind 7 to 10 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday Night
Snow, possibly mixed with rain. Low around 30. West wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Thursday
Snow likely, possibly mixed with rain before 10am, then a chance of snow. Partly sunny, with a high near 35. West wind 10 to 15 mph, with gusts as high as 25 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 26. Northwest wind around 7 mph. New snow accumulation of less than a half inch possible.
Friday
Snow likely before 1pm, then rain likely, possibly mixed with snow. Mostly cloudy, with a high near 37. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Saturday
A chance of rain and snow. Partly sunny, with a high near 34. Chance of precipitation is 30%.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 50%.
Sunday
Snow likely, possibly mixed with rain. Mostly cloudy, with a high near 34. Chance of precipitation is 60%.
Sunday Night
Snow likely, possibly mixed with rain. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.
Monday
Rain and snow. High near 33. Chance of precipitation is 80%.
Monday Night
Rain and snow. Low around 26. Chance of precipitation is 90%.
Tuesday
Snow likely. Mostly cloudy, with a high near 33. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
14 Miles NNE Mazama WA
 48.78°N 120.31°W (Elev. 4570 ft)
5:48 pm PST Dec 9, 2025
8pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
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Additional Resources

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