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 >

Hazardous Weather Conditions

Current conditions at

SAWMILL FLATS (MEFW1)

Lat: 46.9675°NLon: 121.08444°WElev: 3000.0ft.

NA

42°F

6°C

Humidity 85%
Wind Speed NW 2 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 07 Dec 07:25 PM PST
Extended Forecast for

Chinook Pass WA

  • Tonight

    Tonight: A chance of snow before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 30. Southwest wind 15 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 50%. Total nighttime snow accumulation of less than one inch possible.

    Low: 30 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Monday

    Monday: Rain and snow, becoming all rain after 10am. The rain could be heavy at times. High near 36. Southwest wind around 15 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    High: 36 °F

    Rain/Snow
    then Heavy
    Rain

  • Monday Night

    Monday Night: Rain and snow. The rain could be heavy at times. Low around 27. Breezy, with a west wind around 23 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 27 °F

    Rain/Snow and
    Breezy

  • Tuesday

    Tuesday: Snow before 1pm, then snow, possibly mixed with rain. High near 35. West wind 7 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    High: 35 °F

    Snow then
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow. Low around 32. West wind 11 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 32 °F

    Rain/Snow

  • Wednesday

    Wednesday: Rain and snow. The rain could be heavy at times. High near 36. Chance of precipitation is 100%. New snow accumulation of around an inch possible.

    High: 36 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow. The rain could be heavy at times. Low around 32. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 32 °F

    Rain/Snow

  • Thursday

    Thursday: Rain, possibly mixed with snow. High near 36. Chance of precipitation is 80%.

    High: 36 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: Rain likely, possibly mixed with snow. Mostly cloudy, with a low around 34. Chance of precipitation is 70%.

    Low: 34 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
A chance of snow before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 30. Southwest wind 15 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 50%. Total nighttime snow accumulation of less than one inch possible.
Monday
Rain and snow, becoming all rain after 10am. The rain could be heavy at times. High near 36. Southwest wind around 15 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Monday Night
Rain and snow. The rain could be heavy at times. Low around 27. Breezy, with a west wind around 23 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Snow before 1pm, then snow, possibly mixed with rain. High near 35. West wind 7 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Tuesday Night
Rain, possibly mixed with snow. Low around 32. West wind 11 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Wednesday
Rain and snow. The rain could be heavy at times. High near 36. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Wednesday Night
Rain, possibly mixed with snow. The rain could be heavy at times. Low around 32. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Thursday
Rain, possibly mixed with snow. High near 36. Chance of precipitation is 80%.
Thursday Night
Rain likely, possibly mixed with snow. Mostly cloudy, with a low around 34. Chance of precipitation is 70%.
Friday
A chance of rain. Mostly cloudy, with a high near 38.
Friday Night
A chance of rain. Mostly cloudy, with a low around 32.
Saturday
Rain likely. Partly sunny, with a high near 38.
Saturday Night
Rain and snow likely. Mostly cloudy, with a low around 31.
Sunday
Rain and snow likely. Mostly cloudy, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chinook Pass WA
 46.88°N 121.5°W (Elev. 4823 ft)
Last Update:
3:20 pm PST Dec 7, 2025
Forecast Valid:
7pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation