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

CANYON CREEK (CYFW1)

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

NA

48°F

9°C

Humidity 100%
Wind Speed SE 13 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Wind Chill43°F (6°C)
Last update 08 Dec 12:52 PM PST
Extended Forecast for

Mount St Helens WA

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

    NOW until 4:00am Fri

    Flood Watch

  • This Afternoon

    High: 37 °F

    Heavy Rain
    and Very
    Windy

  • Tonight

    Tonight: Rain before 2am, then rain, possibly mixed with snow between 2am and 3am, then snow after 3am. The rain and snow could be heavy at times. Snow level 8000 feet lowering to 6000 feet after midnight . Low around 30. Very windy, with a southwest wind 32 to 37 mph decreasing to 25 to 30 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 30 °F

    Very Windy.
    Heavy Rain
    then
    Rain/Snow

  • Tuesday

    Tuesday: Snow before noon, then rain, possibly mixed with snow. The snow could be heavy at times. Snow level rising to 8600 feet in the afternoon. High near 39. Northwest wind 7 to 10 mph becoming south southwest in the morning. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    High: 39 °F

    Heavy Snow
    then
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain. The rain could be heavy at times. Low around 35. Very windy, with a southwest wind 18 to 23 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 100%. New precipitation amounts between 3 and 4 inches possible.

    Low: 35 °F

    Heavy Rain
    and Very
    Windy

  • Wednesday

    Wednesday: Rain, possibly mixed with snow. The rain could be heavy at times. Snow level 8500 feet lowering to 7800 feet in the afternoon . High near 41. Windy, with a southwest wind 22 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 41 °F

    Rain/Snow and
    Windy

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow before 10pm, then rain between 10pm and 1am, then rain, possibly mixed with snow after 1am. Snow level 8000 feet. Low around 37. Windy. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 37 °F

    Rain/Snow and
    Windy

  • Thursday

    Thursday: Rain and snow. Snow level 6900 feet rising to 7600 feet in the afternoon. High near 40. Breezy. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow and
    Breezy

  • Thursday Night

    Thursday Night: Rain and snow likely, mainly before 10pm. Snow level 7100 feet. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Rain/Snow
    Likely

Detailed Forecast

This Afternoon
Rain. The rain could be heavy at times. High near 37. Very windy, with a west southwest wind around 31 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Tonight
Rain before 2am, then rain, possibly mixed with snow between 2am and 3am, then snow after 3am. The rain and snow could be heavy at times. Snow level 8000 feet lowering to 6000 feet after midnight . Low around 30. Very windy, with a southwest wind 32 to 37 mph decreasing to 25 to 30 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Tuesday
Snow before noon, then rain, possibly mixed with snow. The snow could be heavy at times. Snow level rising to 8600 feet in the afternoon. High near 39. Northwest wind 7 to 10 mph becoming south southwest in the morning. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Tuesday Night
Rain. The rain could be heavy at times. Low around 35. Very windy, with a southwest wind 18 to 23 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 100%. New precipitation amounts between 3 and 4 inches possible.
Wednesday
Rain, possibly mixed with snow. The rain could be heavy at times. Snow level 8500 feet lowering to 7800 feet in the afternoon . High near 41. Windy, with a southwest wind 22 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday Night
Rain, possibly mixed with snow before 10pm, then rain between 10pm and 1am, then rain, possibly mixed with snow after 1am. Snow level 8000 feet. Low around 37. Windy. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday
Rain and snow. Snow level 6900 feet rising to 7600 feet in the afternoon. High near 40. Breezy. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday Night
Rain and snow likely, mainly before 10pm. Snow level 7100 feet. Mostly cloudy, with a low around 38.
Friday
A chance of rain and snow before 7am, then a chance of rain. Snow level 6900 feet. Mostly cloudy, with a high near 39.
Friday Night
A slight chance of rain before 4am, then a slight chance of rain and snow. Snow level 6600 feet. Mostly cloudy, with a low around 33.
Saturday
Rain and snow likely. Snow level 6300 feet. Partly sunny, with a high near 36.
Saturday Night
Rain and snow likely. Mostly cloudy, with a low around 32. Breezy.
Sunday
Snow. Mostly cloudy, with a high near 33. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount St Helens WA
 46.2°N 122.18°W (Elev. 5997 ft)
Last Update:
1:01 pm PST Dec 8, 2025
Forecast Valid:
1pm PST Dec 8, 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