National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

SISTERS (K6K5)

Lat: 44.30445°NLon: 121.53909°WElev: 3168.0ft.

NA

50°F

10°C

Humidity 61%
Wind Speed SSW 10 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 37°F (3°C)
Visibility NA
Wind Chill46°F (8°C)
Last update 07 Dec 07:55 PM PST
Extended Forecast for

Mount Bachelor OR

  • Tonight

    Tonight: Snow likely before 1am, then rain and snow likely. Mostly cloudy, with a low around 34. West wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 34 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Monday

    Monday: Rain, possibly mixed with snow, becoming all rain after 10am. Snow level 8000 feet. High near 38. Southwest wind 13 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 38 °F

    Rain/Snow
    then Rain

  • Monday Night

    Monday Night: Rain likely before 10pm, then rain, possibly mixed with snow between 10pm and 4am, then rain after 4am. Snow level 7900 feet. Low around 37. Breezy, with a southwest wind 26 to 29 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 37 °F

    Rain/Snow and
    Breezy

  • Tuesday

    Tuesday: Rain before 7am, then rain, possibly mixed with snow between 7am and 10am, then rain after 10am. High near 43. Breezy, with a west wind 20 to 25 mph decreasing to 13 to 18 mph in the morning. Winds could gust as high as 55 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 43 °F

    Rain/Snow and
    Breezy then
    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 40. Breezy, with a west wind 21 to 24 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Rain and
    Breezy

  • Wednesday

    Wednesday: Rain. High near 42. Breezy. Chance of precipitation is 80%.

    High: 42 °F

    Rain and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.

    Low: 39 °F

    Rain Likely

  • Thursday

    Thursday: A 50 percent chance of rain, mainly before 4pm. Partly sunny, with a high near 43.

    High: 43 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before 10pm. Snow level 8000 feet. Partly cloudy, with a low around 33.

    Low: 33 °F

    Slight Chance
    Rain then
    Partly Cloudy

Detailed Forecast

Tonight
Snow likely before 1am, then rain and snow likely. Mostly cloudy, with a low around 34. West wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday
Rain, possibly mixed with snow, becoming all rain after 10am. Snow level 8000 feet. High near 38. Southwest wind 13 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Monday Night
Rain likely before 10pm, then rain, possibly mixed with snow between 10pm and 4am, then rain after 4am. Snow level 7900 feet. Low around 37. Breezy, with a southwest wind 26 to 29 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Tuesday
Rain before 7am, then rain, possibly mixed with snow between 7am and 10am, then rain after 10am. High near 43. Breezy, with a west wind 20 to 25 mph decreasing to 13 to 18 mph in the morning. Winds could gust as high as 55 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday Night
Rain. Low around 40. Breezy, with a west wind 21 to 24 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain. High near 42. Breezy. Chance of precipitation is 80%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.
Thursday
A 50 percent chance of rain, mainly before 4pm. Partly sunny, with a high near 43.
Thursday Night
A 20 percent chance of rain before 10pm. Snow level 8000 feet. Partly cloudy, with a low around 33.
Friday
Mostly sunny, with a high near 47.
Friday Night
Mostly clear, with a low around 33.
Saturday
A chance of rain and snow. Snow level rising to 7100 feet in the afternoon. Sunny, with a high near 47.
Saturday Night
A chance of rain and snow. Partly cloudy, with a low around 32.
Sunday
A chance of snow. Partly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Bachelor OR
 43.97°N 121.67°W (Elev. 6867 ft)
Last Update:
3:20 pm PST Dec 7, 2025
Forecast Valid:
8pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation