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

43°F

6°C

Humidity 100%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 07 Dec 08:52 PM PST
Extended Forecast for

4 Miles NNE 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, mainly before midnight. Snow level 5000 feet. Mostly cloudy, with a low around 38. West southwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 38 °F

    Showers
    Likely

  • Monday

    Monday: Showers, mainly before 10am, then rain after 10am. The rain could be heavy at times. High near 45. Windy, with a southwest wind 14 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

    High: 45 °F

    Heavy Rain
    and Windy

  • Monday Night

    Monday Night: Rain before 1am, then rain, possibly mixed with snow. The rain could be heavy at times. Low around 35. Windy, with a west southwest wind 18 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 35 °F

    Windy. Heavy
    Rain then
    Rain/Snow

  • Tuesday

    Tuesday: Rain, possibly mixed with snow, becoming all rain after 1pm. Snow level 4400 feet rising to 6300 feet in the afternoon. High near 44. Southwest wind around 7 mph becoming south southeast in the morning. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain. The rain could be heavy at times. Low around 39. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

    Low: 39 °F

    Heavy Rain
    and Breezy

  • Wednesday

    Wednesday: Rain. The rain could be heavy at times. High near 45. Breezy. Chance of precipitation is 100%.

    High: 45 °F

    Heavy Rain
    and Breezy

  • Wednesday Night

    Wednesday Night: Rain. The rain could be heavy at times. Low around 41. Chance of precipitation is 90%.

    Low: 41 °F

    Heavy Rain

  • Thursday

    Thursday: Rain. Mostly cloudy, with a high near 46.

    High: 46 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Rain Likely

Detailed Forecast

Tonight
Showers likely, mainly before midnight. Snow level 5000 feet. Mostly cloudy, with a low around 38. West southwest wind 8 to 10 mph, with gusts as high as 18 mph. 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 45. Windy, with a southwest wind 14 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
Monday Night
Rain before 1am, then rain, possibly mixed with snow. The rain could be heavy at times. Low around 35. Windy, with a west southwest wind 18 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Tuesday
Rain, possibly mixed with snow, becoming all rain after 1pm. Snow level 4400 feet rising to 6300 feet in the afternoon. High near 44. Southwest wind around 7 mph becoming south southeast in the morning. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Tuesday Night
Rain. The rain could be heavy at times. Low around 39. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 31 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 45. Breezy. Chance of precipitation is 100%.
Wednesday Night
Rain. The rain could be heavy at times. Low around 41. Chance of precipitation is 90%.
Thursday
Rain. Mostly cloudy, with a high near 46.
Thursday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43.
Friday
A chance of rain. Mostly cloudy, with a high near 48.
Friday Night
A chance of rain. Mostly cloudy, with a low around 38.
Saturday
Rain likely. Partly sunny, with a high near 46.
Saturday Night
Rain likely, possibly mixed with snow. Snow level 5900 feet. Mostly cloudy, with a low around 39.
Sunday
Rain likely, possibly mixed with snow. Snow level 5300 feet. Mostly cloudy, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Mount St Helens WA
 46.25°N 122.14°W (Elev. 3917 ft)
Last Update:
8:41 pm PST Dec 7, 2025
Forecast Valid:
9pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation