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

Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

SAWMILL FLATS (MEFW1)

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

NA

39°F

4°C

Humidity 100%
Wind Speed NNE 1 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 08 Dec 03:25 PM PST
Extended Forecast for

Chinook Pass WA

Flood Watch until December 12, 07:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until December 12, 07:00am

    NOW until 7:00am Fri

    Flood Watch

  • This Afternoon

    High: 37 °F

    Heavy Rain

  • Tonight

    Tonight: Rain before 10pm, then rain and snow. The rain could be heavy at times. Low around 27. Breezy, with a west wind 18 to 24 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 27 °F

    Rain/Snow and
    Breezy

  • Tuesday

    Tuesday: Snow before 1pm, then rain, possibly mixed with snow. High near 37. West wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 37 °F

    Snow then
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow, becoming all rain after 7pm. The rain could be heavy at times. Low around 31. Southwest wind 11 to 20 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 31 °F

    Rain/Snow
    then Heavy
    Rain

  • Wednesday

    Wednesday: Rain before 10am, then rain, possibly mixed with snow. The rain could be heavy at times. High near 38. West wind 15 to 20 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 38 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow. Low around 34. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 34 °F

    Rain/Snow

  • Thursday

    Thursday: Rain, possibly mixed with snow. High near 37. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: Rain likely, possibly mixed with snow, mainly before 10pm. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.

    Low: 35 °F

    Rain/Snow
    Likely

Detailed Forecast

This Afternoon
Rain. The rain could be heavy at times. High near 37. Southwest wind around 20 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Tonight
Rain before 10pm, then rain and snow. The rain could be heavy at times. Low around 27. Breezy, with a west wind 18 to 24 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Tuesday
Snow before 1pm, then rain, possibly mixed with snow. High near 37. West wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Rain, possibly mixed with snow, becoming all rain after 7pm. The rain could be heavy at times. Low around 31. Southwest wind 11 to 20 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Wednesday
Rain before 10am, then rain, possibly mixed with snow. The rain could be heavy at times. High near 38. West wind 15 to 20 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday Night
Rain, possibly mixed with snow. Low around 34. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Thursday
Rain, possibly mixed with snow. High near 37. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday Night
Rain likely, possibly mixed with snow, mainly before 10pm. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.
Friday
A chance of rain and snow before 10am, then a chance of rain. Mostly cloudy, with a high near 38. Chance of precipitation is 40%.
Friday Night
A chance of rain, mainly before 4am. Mostly cloudy, with a low around 33.
Saturday
A chance of rain. Partly sunny, with a high near 38.
Saturday Night
Rain and snow likely. Mostly cloudy, with a low around 30.
Sunday
Rain and snow. Mostly cloudy, with a high near 31.
Sunday Night
Rain and snow likely. Mostly cloudy, with a low around 29.
Monday
Rain and snow. Mostly cloudy, with a high near 35.
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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 8, 2025
Forecast Valid:
3pm PST Dec 8, 2025-6pm PST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation