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

32°F

0°C

Humidity 100%
Wind Speed NW 0 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 10 Dec 12:06 AM PST
Extended Forecast for

10 Miles NNW Mazama WA

  • Overnight

    Overnight: Snow before 2am, then rain and snow. The snow could be heavy at times.  Temperature rising to around 35 by 5am. Southwest wind around 14 mph.  Chance of precipitation is 100%. Total nighttime snow accumulation of 5 to 9 inches possible.

    Low: 28 °F

    Rain/Snow

  • Wednesday

    Wednesday: Rain before 10am, then rain, possibly mixed with snow between 10am and 11am, then rain after 11am. The rain could be heavy at times.  High near 34. West wind 5 to 8 mph.  Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 34 °F

    Rain/Snow
    then Heavy
    Rain

  • Wednesday Night

    Wednesday Night: Rain and snow, becoming all snow after 1am. The rain and snow could be heavy at times.  Low around 26. Breezy, with a west wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 30 mph.  Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    Low: 26 °F

    Rain/Snow and
    Breezy

  • Thursday

    Thursday: Snow before 10am, then a chance of snow after 4pm.  High near 30. West wind 11 to 17 mph.  Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 30 °F

    Snow then
    Chance Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly after 10pm.  Mostly cloudy, with a low around 25. Northwest wind around 10 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Snow Likely

  • Friday

    Friday: Snow.  High near 32. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 32 °F

    Snow

  • Friday Night

    Friday Night: Snow likely, mainly before 10pm.  Mostly cloudy, with a low around 29. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 29 °F

    Snow Likely

  • Saturday

    Saturday: A 40 percent chance of snow, mainly before 10am.  Partly sunny, with a high near 30.

    High: 30 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

Detailed Forecast

Overnight
Snow before 2am, then rain and snow. The snow could be heavy at times. Temperature rising to around 35 by 5am. Southwest wind around 14 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 5 to 9 inches possible.
Wednesday
Rain before 10am, then rain, possibly mixed with snow between 10am and 11am, then rain after 11am. The rain could be heavy at times. High near 34. West wind 5 to 8 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain and snow, becoming all snow after 1am. The rain and snow could be heavy at times. Low around 26. Breezy, with a west wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Thursday
Snow before 10am, then a chance of snow after 4pm. High near 30. West wind 11 to 17 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Thursday Night
Snow likely, mainly after 10pm. Mostly cloudy, with a low around 25. Northwest wind around 10 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow. High near 32. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday Night
Snow likely, mainly before 10pm. Mostly cloudy, with a low around 29. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Saturday
A 40 percent chance of snow, mainly before 10am. Partly sunny, with a high near 30.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 27.
Sunday
Snow likely. Mostly cloudy, with a high near 30. Chance of precipitation is 70%.
Sunday Night
Snow likely. Mostly cloudy, with a low around 28. Chance of precipitation is 70%.
Monday
Snow. The snow could be heavy at times. High near 31. Chance of precipitation is 90%.
Monday Night
Snow. The snow could be heavy at times. Low around 26. Chance of precipitation is 90%.
Tuesday
Snow. High near 27. Chance of precipitation is 80%.
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NNW Mazama WA
 48.74°N 120.49°W (Elev. 5673 ft)
12:07 am PST Dec 10, 2025
12am PST Dec 10, 2025-6pm PST Dec 16, 2025
 
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Additional Resources

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