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

CANYON CREEK (CYFW1)

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

NA

39°F

4°C

Humidity 100%
Wind Speed SW 0 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 09 Dec 05:52 AM PST
Extended Forecast for

Mount St Helens WA

Flood Watch December 9, 06:52am until December 11, 04:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 9, 06:52am until December 11, 04:00pm

    NOW until 4:00pm Thu

    Flood Watch

  • Today

    High: 41 °F

    Snow Likely
    then
    Rain/Snow

  • Tonight

    Tonight: Rain. The rain could be heavy at times. Temperature rising to around 42 by 11pm. Windy, with a southwest wind 18 to 26 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.

    Low: 37 °F⇑

    Heavy Rain
    and Windy

  • Wednesday

    Wednesday: Rain. The rain could be heavy at times. High near 43. Windy, with a southwest wind 21 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    High: 43 °F

    Heavy Rain
    and Windy

  • Wednesday Night

    Wednesday Night: Rain. Low around 39. Windy, with a west southwest wind around 22 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    Low: 39 °F

    Rain and
    Windy

  • Thursday

    Thursday: Rain before 4pm, then rain likely, possibly mixed with snow. High near 42. Breezy, with a west wind 8 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 42 °F

    Rain and
    Breezy then
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain likely, possibly mixed with snow, becoming all rain after 7pm. Snow level 7300 feet. Mostly cloudy, with a low around 39. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 39 °F

    Rain/Snow
    Likely then
    Chance Rain

  • Friday

    Friday: A 50 percent chance of rain. Snow level 6800 feet. Mostly cloudy, with a high near 42.

    High: 42 °F

    Chance Rain

  • Friday Night

    Friday Night: A chance of rain, mainly before 10pm. Snow level 6400 feet. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Today
Snow likely before noon, then rain and snow likely between noon and 1pm, then rain after 1pm. Snow level rising to 8600 feet in the afternoon. High near 41. Northwest wind 6 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 100%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Rain. The rain could be heavy at times. Temperature rising to around 42 by 11pm. Windy, with a southwest wind 18 to 26 mph, with gusts as high as 44 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 43. Windy, with a southwest wind 21 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Wednesday Night
Rain. Low around 39. Windy, with a west southwest wind around 22 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Thursday
Rain before 4pm, then rain likely, possibly mixed with snow. High near 42. Breezy, with a west wind 8 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday Night
Rain likely, possibly mixed with snow, becoming all rain after 7pm. Snow level 7300 feet. Mostly cloudy, with a low around 39. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday
A 50 percent chance of rain. Snow level 6800 feet. Mostly cloudy, with a high near 42.
Friday Night
A chance of rain, mainly before 10pm. Snow level 6400 feet. Mostly cloudy, with a low around 35.
Saturday
A chance of rain, mainly after 10am. Snow level 6100 feet. Partly sunny, with a high near 41.
Saturday Night
Snow, possibly mixed with rain. Snow level 5900 feet. Mostly cloudy, with a low around 35.
Sunday
Snow, possibly mixed with rain. Mostly cloudy, with a high near 36.
Sunday Night
Snow likely, possibly mixed with rain. Snow level 5400 feet. Mostly cloudy, with a low around 35.
Monday
Rain and snow. Snow level 6300 feet. Cloudy, with a high near 39. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount St Helens WA
 46.21°N 122.15°W (Elev. 5259 ft)
Last Update:
6:41 am PST Dec 9, 2025
Forecast Valid:
6am 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