National Weather Service United States Department of Commerce

Heavy rain and mountain snow across the northwestern U.S. this weekend

A Pacific storm system will continue to impact the Pacific Northwest through late Sunday. Heavy rainfall could lead to flash flooding, river and small stream flooding, as well as mudslides and debris flows, especially over burn scars. At higher elevations, strong winds and heavy snowfall, with accumulations of 1 to 3 feet, could result in hazardous travel through mountain passes.
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Current Conditions

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Mount St Helens WA

7 Day Forecast

For More Weather Information:

Portland, OR Local Forecast Office

Today

Snow Chance for Measurable Precipitation 100%

Snow

High: 42 °FFalling Temperatures

Tonight

Snow Chance for Measurable Precipitation 90%

Snow

Low: 34 °F

Monday

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

High: 39 °F

Monday
Night

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

Low: 33 °F

Tuesday

Rain/Snow Chance for Measurable Precipitation 80%

Rain/Snow

High: 38 °F

Tuesday
Night

Rain/Snow Chance for Measurable Precipitation 80%

Rain/Snow

Low: 28 °F

Wednesday

Snow Chance for Measurable Precipitation 80%

Snow

High: 31 °F

Wednesday
Night

Snow Likely

Snow
Likely

Low: 24 °F

Christmas
Day

Chance Snow

Chance
Snow

High: 28 °F

Detailed Forecast

  • Today Snow. Temperature falling to around 37 by 5pm. Windy, with a west wind 32 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
  • Tonight Snow, mainly before 4am. Low around 34. Windy, with a west wind 24 to 30 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
  • Monday A 40 percent chance of snow, mainly before 10am. Mostly cloudy, with a high near 39. West wind 7 to 14 mph, with gusts as high as 18 mph. Little or no snow accumulation expected.
  • Monday Night A 40 percent chance of snow, mainly after 10pm. Mostly cloudy, with a low around 33. West wind around 7 mph. Little or no snow accumulation expected.
  • Tuesday Snow likely before 4pm, then rain, possibly mixed with snow. High near 38. West southwest wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
  • Tuesday Night Rain and snow, becoming all snow after 10pm. Low around 28. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
  • Wednesday Snow. High near 31. Breezy. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
  • Wednesday Night Snow showers likely. Mostly cloudy, with a low around 24. Blustery.
  • Christmas Day A chance of snow showers. Mostly cloudy, with a high near 28.
  • Thursday Night A chance of snow showers. Mostly cloudy, with a low around 23.
  • Friday Partly sunny, with a high near 31.
  • Friday Night Mostly cloudy, with a low around 25.
  • Saturday A chance of snow. Mostly cloudy, with a high near 31.