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

3 Miles SW Mazama WA

  • Tonight

    Tonight: Snow before 1am, then rain. The snow could be heavy at times.  Temperature rising to around 38 by 4am. Light east wind.  Chance of precipitation is 100%. Total nighttime snow accumulation of 3 to 7 inches possible.

    Low: 34 °F

    Heavy Snow
    then
    Rain/Snow

  • Wednesday

    Wednesday: Rain. The rain could be heavy at times.  High near 42. West wind 5 to 9 mph.  Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

    High: 42 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: Rain before 1am, then rain, possibly mixed with snow between 1am and 4am, then rain likely after 4am. The rain could be heavy at times.  Low around 35. West wind around 8 mph.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 35 °F

    Heavy Rain
    then
    Rain/Snow

  • Thursday

    Thursday: Rain likely before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm.  Mostly cloudy, with a high near 40. West wind 8 to 16 mph, with gusts as high as 26 mph.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: Snow likely, possibly mixed with rain, mainly after 4am.  Mostly cloudy, with a low around 33. West wind 3 to 5 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow
    Likely

  • Friday

    Friday: Rain likely, possibly mixed with snow, becoming all rain after 1pm.  Mostly cloudy, with a high near 41. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 41 °F

    Rain/Snow
    Likely

  • Friday Night

    Friday Night: A chance of rain before 1am, then a chance of rain and snow.  Mostly cloudy, with a low around 33. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 33 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Saturday

    Saturday: A chance of rain and snow before 1pm, then a chance of rain.  Partly sunny, with a high near 39. Chance of precipitation is 30%.

    High: 39 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of rain.  Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain

Detailed Forecast

Tonight
Snow before 1am, then rain. The snow could be heavy at times. Temperature rising to around 38 by 4am. Light east wind. Chance of precipitation is 100%. Total nighttime snow accumulation of 3 to 7 inches possible.
Wednesday
Rain. The rain could be heavy at times. High near 42. West wind 5 to 9 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
Wednesday Night
Rain before 1am, then rain, possibly mixed with snow between 1am and 4am, then rain likely after 4am. The rain could be heavy at times. Low around 35. West wind around 8 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday
Rain likely before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm. Mostly cloudy, with a high near 40. West wind 8 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
Snow likely, possibly mixed with rain, mainly after 4am. Mostly cloudy, with a low around 33. West wind 3 to 5 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Rain likely, possibly mixed with snow, becoming all rain after 1pm. Mostly cloudy, with a high near 41. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday Night
A chance of rain before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 50%. Little or no snow accumulation expected.
Saturday
A chance of rain and snow before 1pm, then a chance of rain. Partly sunny, with a high near 39. Chance of precipitation is 30%.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 31.
Sunday
Rain likely. Mostly cloudy, with a high near 39. Chance of precipitation is 70%.
Sunday Night
Rain likely. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Monday
Rain, possibly mixed with snow. High near 37. Chance of precipitation is 80%.
Monday Night
Rain and snow. Low around 32. Chance of precipitation is 90%.
Tuesday
Rain and snow. High near 38. Chance of precipitation is 80%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Mazama WA
 48.57°N 120.47°W (Elev. 3199 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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