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

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds in the North-Central U.S.

A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall which has lead to areas of urban and river flooding along with gusty winds into Thursday. A clipper will bring heavy snow, some mixed wintry precipitation, and gusty to high winds across the northern Plains, Upper Midwest, and the Great Lakes into Thursday morning. Read More >

Hazardous Weather Conditions

Current conditions at

SAWMILL FLATS (MEFW1)

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

NA

40°F

4°C

Humidity 92%
Wind Speed WNW 2 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 09 Dec 11:25 AM PST
Extended Forecast for

Chinook Pass WA

Flood Watch December 9, 12:41pm until December 12, 07:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 9, 12:41pm until December 12, 07:00am

    NOW until 7:00am Fri

    Flood Watch

  • This Afternoon

    High: 32 °F

    Rain/Snow

  • Tonight

    Tonight: Rain, possibly mixed with snow, becoming all rain after 7pm. The rain could be heavy at times. Temperature rising to around 39 by 4am. Southwest wind 14 to 20 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 31 °F⇑

    Rain/Snow
    then Heavy
    Rain

  • Wednesday

    Wednesday: Rain. The rain could be heavy at times. High near 39. Southwest wind 16 to 18 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    High: 39 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: Rain before 1am, then rain, possibly mixed with snow between 1am and 4am, then rain after 4am. Low around 35. West wind around 18 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain then
    Rain/Snow

  • Thursday

    Thursday: Rain before 7am, then rain, possibly mixed with snow. High near 37. West wind 14 to 17 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 37 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: Rain likely, possibly mixed with snow, becoming all rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely

  • Friday

    Friday: A 50 percent chance of rain. Mostly cloudy, with a high near 37.

    High: 37 °F

    Chance Rain

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly before 4am. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

Detailed Forecast

This Afternoon
A chance of snow before 1pm, then rain, possibly mixed with snow. Steady temperature around 32. Southwest wind around 7 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 1 to 2 inches possible.
Tonight
Rain, possibly mixed with snow, becoming all rain after 7pm. The rain could be heavy at times. Temperature rising to around 39 by 4am. Southwest wind 14 to 20 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday
Rain. The rain could be heavy at times. High near 39. Southwest wind 16 to 18 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Wednesday Night
Rain before 1am, then rain, possibly mixed with snow between 1am and 4am, then rain after 4am. Low around 35. West wind around 18 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday
Rain before 7am, then rain, possibly mixed with snow. High near 37. West wind 14 to 17 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
Rain likely, possibly mixed with snow, becoming all rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday
A 50 percent chance of rain. Mostly cloudy, with a high near 37.
Friday Night
A 30 percent chance of rain, mainly before 4am. Mostly cloudy, with a low around 32.
Saturday
A 30 percent chance of rain, mainly after 10am. Partly sunny, with a high near 39.
Saturday Night
Rain and snow likely, mainly after 10pm. Mostly cloudy, with a low around 31.
Sunday
Rain and snow likely. Mostly cloudy, with a high near 33.
Sunday Night
Rain and snow. Mostly cloudy, with a low around 31.
Monday
Rain and snow. Mostly cloudy, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chinook Pass WA
 46.88°N 121.5°W (Elev. 4823 ft)
Last Update:
9:15 am PST Dec 9, 2025
Forecast Valid:
12pm PST Dec 9, 2025-6pm PST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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