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

46°F

8°C

Humidity 100%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 07 Dec 12:52 PM PST
Extended Forecast for

3 Miles ENE Mount St Helens WA

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

  • This Afternoon

    This Afternoon: Rain. Snow level 6300 feet lowering to 5800 feet. High near 40. West southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 40 °F

    Rain

  • Tonight

    Tonight: Rain likely, mainly before midnight. Snow level 5000 feet. Mostly cloudy, with a low around 37. West wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Rain Likely

  • Monday

    Monday: Rain. The rain could be heavy at times. High near 44. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between 3 and 4 inches possible.

    High: 44 °F

    Heavy Rain
    and Breezy

  • 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 25 mph, with gusts as high as 39 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 and snow, becoming all rain after 1pm. Snow level 4600 feet rising to 6300 feet in the afternoon. High near 44. South wind around 6 mph. 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. Chance of precipitation is 100%.

    Low: 39 °F

    Heavy Rain
    and Breezy

  • Wednesday

    Wednesday: Rain. The rain could be heavy at times. High near 44. Breezy. Chance of precipitation is 100%.

    High: 44 °F

    Heavy Rain
    and Breezy

  • Wednesday Night

    Wednesday Night: Rain. The rain could be heavy at times. Cloudy, with a low around 41.

    Low: 41 °F

    Heavy Rain

  • Thursday

    Thursday: Rain. Mostly cloudy, with a high near 44.

    High: 44 °F

    Rain

Detailed Forecast

This Afternoon
Rain. Snow level 6300 feet lowering to 5800 feet. High near 40. West southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain likely, mainly before midnight. Snow level 5000 feet. Mostly cloudy, with a low around 37. West wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain. The rain could be heavy at times. High near 44. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between 3 and 4 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 25 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Tuesday
Rain and snow, becoming all rain after 1pm. Snow level 4600 feet rising to 6300 feet in the afternoon. High near 44. South wind around 6 mph. 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. Chance of precipitation is 100%.
Wednesday
Rain. The rain could be heavy at times. High near 44. Breezy. Chance of precipitation is 100%.
Wednesday Night
Rain. The rain could be heavy at times. Cloudy, with a low around 41.
Thursday
Rain. Mostly cloudy, with a high near 44.
Thursday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43.
Friday
A chance of rain. Partly sunny, with a high near 46.
Friday Night
A chance of rain. Mostly cloudy, with a low around 38.
Saturday
Rain likely. Partly sunny, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Mount St Helens WA
 46.21°N 122.12°W (Elev. 3865 ft)
Last Update:
1:00 pm PST Dec 7, 2025
Forecast Valid:
1pm PST Dec 7, 2025-6pm PST Dec 13, 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