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

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: Snow showers likely, mainly before midnight. Mostly cloudy, with a low around 31. Breezy, with a southwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of around an inch possible.

    Low: 31 °F

    Snow Showers
    Likely and
    Breezy

  • Monday

    Monday: Rain and snow showers before 10am, then rain. The rain could be heavy at times. Snow level 7300 feet rising to 8300 feet in the afternoon. High near 36. Very windy, with a southwest wind 25 to 32 mph, with gusts as high as 47 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    High: 36 °F

    Very Windy.
    Rain/Snow
    then Heavy
    Rain

  • Monday Night

    Monday Night: Rain before 10pm, then rain, possibly mixed with snow between 10pm and 1am, then snow after 1am. The rain and snow could be heavy at times. Snow level 7700 feet lowering to 6600 feet after midnight . Low around 30. Very windy, with a west southwest wind 30 to 37 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Low: 30 °F

    Rain/Snow and
    Very Windy

  • Tuesday

    Tuesday: Snow before 4pm, then snow, possibly mixed with rain. The rain and snow could be heavy at times. High near 39. Southwest wind 9 to 14 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.

    High: 39 °F

    Heavy Snow
    then
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow. The rain could be heavy at times. Snow level 8000 feet. Low around 34. Very windy, with a west southwest wind 23 to 32 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 34 °F

    Rain/Snow and
    Very Windy

  • Wednesday

    Wednesday: Snow, possibly mixed with rain. The rain could be heavy at times. Snow level 7200 feet. High near 40. Windy. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow and
    Windy

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow. The rain could be heavy at times. Snow level 7400 feet. Low around 35. Breezy. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 35 °F

    Rain/Snow and
    Breezy

  • Thursday

    Thursday: Rain and snow. Snow level 7700 feet. Mostly cloudy, with a high near 39. Breezy.

    High: 39 °F

    Rain/Snow and
    Breezy

  • Thursday Night

    Thursday Night: Rain and snow likely, mainly before 10pm. Snow level 7500 feet. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
Snow showers likely, mainly before midnight. Mostly cloudy, with a low around 31. Breezy, with a southwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of around an inch possible.
Monday
Rain and snow showers before 10am, then rain. The rain could be heavy at times. Snow level 7300 feet rising to 8300 feet in the afternoon. High near 36. Very windy, with a southwest wind 25 to 32 mph, with gusts as high as 47 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Monday Night
Rain before 10pm, then rain, possibly mixed with snow between 10pm and 1am, then snow after 1am. The rain and snow could be heavy at times. Snow level 7700 feet lowering to 6600 feet after midnight . Low around 30. Very windy, with a west southwest wind 30 to 37 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Tuesday
Snow before 4pm, then snow, possibly mixed with rain. The rain and snow could be heavy at times. High near 39. Southwest wind 9 to 14 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.
Tuesday Night
Rain, possibly mixed with snow. The rain could be heavy at times. Snow level 8000 feet. Low around 34. Very windy, with a west southwest wind 23 to 32 mph, with gusts as high as 48 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Wednesday
Snow, possibly mixed with rain. The rain could be heavy at times. Snow level 7200 feet. High near 40. Windy. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain, possibly mixed with snow. The rain could be heavy at times. Snow level 7400 feet. Low around 35. Breezy. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Rain and snow. Snow level 7700 feet. Mostly cloudy, with a high near 39. Breezy.
Thursday Night
Rain and snow likely, mainly before 10pm. Snow level 7500 feet. Mostly cloudy, with a low around 37.
Friday
A chance of rain and snow before 7am, then a chance of rain between 7am and 10am, then a chance of rain and snow after 10am. Snow level 7100 feet. Mostly cloudy, with a high near 39.
Friday Night
A chance of rain and snow. Snow level 6800 feet. Mostly cloudy, with a low around 33. Breezy.
Saturday
Snow likely. Mostly cloudy, with a high near 37. Breezy.
Saturday Night
Snow likely. Mostly cloudy, with a low around 33. Breezy.
Sunday
Snow likely. Mostly cloudy, with a high near 34. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount St Helens WA
 46.2°N 122.21°W (Elev. 6598 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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Chance of Precipitation