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

CANYON CREEK (CYFW1)

Lat: 45.92944°NLon: 122.20278°WElev: 2592.0ft.

NA

44°F

7°C

Humidity 100%
Wind Speed SSE 5 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Wind Chill41°F (5°C)
Last update 07 Dec 05:52 PM PST
Extended Forecast for

8 Miles NNW Mount St Helens WA

Flood Watch December 8, 04:00am until December 12, 04:00am
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: Showers likely before 4am, then a chance of showers after 5am. Snow level 5000 feet. Mostly cloudy, with a low around 40. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Showers
    Likely

  • Monday

    Monday: Showers, mainly before 10am, then rain after 10am. The rain could be heavy at times. High near 48. South southwest wind 7 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    High: 48 °F

    Heavy Rain

  • Monday Night

    Monday Night: Rain before 1am, then rain, possibly mixed with snow between 1am and 4am, then rain after 4am. The rain could be heavy at times. Low around 36. West southwest wind 8 to 13 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 36 °F

    Heavy Rain
    then
    Rain/Snow

  • Tuesday

    Tuesday: Rain before 7am, then rain, possibly mixed with snow between 7am and 1pm, then rain after 1pm. Snow level 4400 feet rising to 6300 feet in the afternoon. High near 46. Light southeast wind. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 46 °F

    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain. The rain could be heavy at times. Low around 41. West southwest wind 7 to 10 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

    Low: 41 °F

    Heavy Rain

  • Wednesday

    Wednesday: Rain. The rain could be heavy at times. High near 47. Chance of precipitation is 100%.

    High: 47 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: Rain. The rain could be heavy at times. Low around 44. Chance of precipitation is 90%.

    Low: 44 °F

    Heavy Rain

  • Thursday

    Thursday: Rain. Mostly cloudy, with a high near 48.

    High: 48 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Rain Likely

Detailed Forecast

Tonight
Showers likely before 4am, then a chance of showers after 5am. Snow level 5000 feet. Mostly cloudy, with a low around 40. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers, mainly before 10am, then rain after 10am. The rain could be heavy at times. High near 48. South southwest wind 7 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Monday Night
Rain before 1am, then rain, possibly mixed with snow between 1am and 4am, then rain after 4am. The rain could be heavy at times. Low around 36. West southwest wind 8 to 13 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday
Rain before 7am, then rain, possibly mixed with snow between 7am and 1pm, then rain after 1pm. Snow level 4400 feet rising to 6300 feet in the afternoon. High near 46. Light southeast wind. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday Night
Rain. The rain could be heavy at times. Low around 41. West southwest wind 7 to 10 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
Wednesday
Rain. The rain could be heavy at times. High near 47. Chance of precipitation is 100%.
Wednesday Night
Rain. The rain could be heavy at times. Low around 44. Chance of precipitation is 90%.
Thursday
Rain. Mostly cloudy, with a high near 48.
Thursday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 44.
Friday
A chance of rain. Mostly cloudy, with a high near 51.
Friday Night
A chance of rain. Mostly cloudy, with a low around 40.
Saturday
Rain likely. Mostly cloudy, with a high near 49.
Saturday Night
Rain likely. Mostly cloudy, with a low around 40.
Sunday
Rain likely. Mostly cloudy, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles NNW Mount St Helens WA
 46.3°N 122.27°W (Elev. 2936 ft)
Last Update:
5:41 pm PST Dec 7, 2025
Forecast Valid:
6pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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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