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

12 Miles NNW Mazama WA

  • Tonight

    Tonight: Snow before 4am, then rain and snow. The rain and snow could be heavy at times.  Temperature falling to near 23 by 9pm, then rising to around 33 during the remainder of the night. Breezy, with a southwest wind 10 to 18 mph.  Chance of precipitation is 100%. Total nighttime snow accumulation of 8 to 12 inches possible.

    Low: 23 °F

    Heavy Snow
    then
    Rain/Snow and
    Breezy

  • Wednesday

    Wednesday: Snow, possibly mixed with rain, becoming all snow after 8am. The rain and snow could be heavy at times.  High near 33. West wind 10 to 14 mph, with gusts as high as 22 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 24. Breezy, with a west wind 11 to 16 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 36 mph.  Chance of precipitation is 100%. New snow accumulation of 10 to 14 inches possible.

    Low: 24 °F

    Heavy Snow
    and Breezy

  • Thursday

    Thursday: Snow, mainly before 10am.  High near 26. West wind 13 to 15 mph, with gusts as high as 24 mph.  Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    High: 26 °F

    Snow then
    Chance Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly after 10pm.  Mostly cloudy, with a low around 23. Northwest wind around 10 mph.  Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 23 °F

    Snow Likely

  • Friday

    Friday: Snow.  High near 29. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 29 °F

    Snow

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm.  Mostly cloudy, with a low around 25. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 25 °F

    Snow Likely

  • Saturday

    Saturday: A 40 percent chance of snow.  Mostly cloudy, with a high near 27.

    High: 27 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Snow likely, mainly after 10pm.  Mostly cloudy, with a low around 24. Chance of precipitation is 60%.

    Low: 24 °F

    Snow Likely

Detailed Forecast

Tonight
Snow before 4am, then rain and snow. The rain and snow could be heavy at times. Temperature falling to near 23 by 9pm, then rising to around 33 during the remainder of the night. Breezy, with a southwest wind 10 to 18 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 rain and snow could be heavy at times. High near 33. West wind 10 to 14 mph, with gusts as high as 22 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 24. Breezy, with a west wind 11 to 16 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of 10 to 14 inches possible.
Thursday
Snow, mainly before 10am. High near 26. West wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Thursday Night
Snow likely, mainly after 10pm. Mostly cloudy, with a low around 23. Northwest wind around 10 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Friday
Snow. High near 29. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 25. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 27.
Saturday Night
Snow likely, mainly after 10pm. Mostly cloudy, with a low around 24. Chance of precipitation is 60%.
Sunday
Snow likely. Mostly cloudy, with a high near 26. Chance of precipitation is 70%.
Sunday Night
Snow likely. Mostly cloudy, with a low around 23. Chance of precipitation is 70%.
Monday
Snow. The snow could be heavy at times. High near 27. Chance of precipitation is 90%.
Monday Night
Snow. The snow could be heavy at times. Low around 24. Breezy. Chance of precipitation is 90%.
Tuesday
Snow. High near 25. Breezy. Chance of precipitation is 80%.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NNW Mazama WA
 48.78°N 120.5°W (Elev. 6663 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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