Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

NCSB (NCSW1)

Lat: 48.42528°NLon: 120.14194°WElev: 1697.0ft.

NA

34°F

1°C

Humidity 100%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 08 Dec 09:06 PM PST
Extended Forecast for

3 Miles SW Mazama WA

  • Tonight

    Tonight: Rain before 11pm, then rain and snow. The rain could be heavy at times.  Low around 33. West wind around 11 mph, with gusts as high as 25 mph.  Chance of precipitation is 100%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow

  • Tuesday

    Tuesday: A slight chance of snow before 1pm, then snow likely, possibly mixed with rain.  Increasing clouds, with a high near 37. West wind 5 to 13 mph.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Slight Chance
    Snow then
    Rain/Snow
    Likely

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow, becoming all rain after 4am.  Temperature falling to near 31 by 8pm, then rising to around 38 during the remainder of the night. Light and variable wind.  Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 31 °F

    Rain/Snow

  • Wednesday

    Wednesday: Rain before 10am, then rain, possibly mixed with snow between 10am and 1pm, then rain after 1pm.  High near 42. West wind around 8 mph, with gusts as high as 21 mph.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 42 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain.  Low around 36. West wind around 6 mph.  Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 36 °F

    Rain

  • Thursday

    Thursday: Rain likely, possibly mixed with snow before 1pm, then rain likely between 1pm and 4pm, then rain likely, possibly mixed with snow after 4pm.  Mostly cloudy, with a high near 40. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow.  Mostly cloudy, with a low around 34. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 34 °F

    Chance
    Rain/Snow

  • Friday

    Friday: A chance of rain and snow before 1pm, then a chance of rain.  Mostly cloudy, with a high near 41. Chance of precipitation is 50%.

    High: 41 °F

    Chance
    Rain/Snow

  • Friday Night

    Friday Night: A 40 percent chance of rain.  Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

Detailed Forecast

Tonight
Rain before 11pm, then rain and snow. The rain could be heavy at times. Low around 33. West wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than a half inch possible.
Tuesday
A slight chance of snow before 1pm, then snow likely, possibly mixed with rain. Increasing clouds, with a high near 37. West wind 5 to 13 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Tuesday Night
Rain, possibly mixed with snow, becoming all rain after 4am. Temperature falling to near 31 by 8pm, then rising to around 38 during the remainder of the night. Light and variable wind. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Wednesday
Rain before 10am, then rain, possibly mixed with snow between 10am and 1pm, then rain after 1pm. High near 42. West wind around 8 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday Night
Rain. Low around 36. West wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday
Rain likely, possibly mixed with snow before 1pm, then rain likely between 1pm and 4pm, then rain likely, possibly mixed with snow after 4pm. Mostly cloudy, with a high near 40. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 34. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday
A chance of rain and snow before 1pm, then a chance of rain. Mostly cloudy, with a high near 41. Chance of precipitation is 50%.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 36.
Saturday
A chance of rain before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm. Partly sunny, with a high near 41. Chance of precipitation is 50%.
Saturday Night
Rain likely, possibly mixed with snow. Mostly cloudy, with a low around 33. Chance of precipitation is 70%.
Sunday
Rain and snow likely. Mostly cloudy, with a high near 39. Chance of precipitation is 70%.
Sunday Night
Rain and snow likely. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Monday
Rain and snow likely. Mostly cloudy, with a high near 38. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Mazama WA
 48.57°N 120.47°W (Elev. 3199 ft)
8:22 pm PST Dec 8, 2025
9pm PST Dec 8, 2025-6pm PST Dec 15, 2025
 
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Additional Resources

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