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 West Coast through 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

Overnight

Rain Chance for Measurable Precipitation 100%

Rain

Low: 39 °F

Sunday

Snow Chance for Measurable Precipitation 100%

Snow

High: 42 °FFalling Temperatures

Sunday
Night

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 Rain/Snow Chance for Measurable Precipitation 40%

Chance
Rain/Snow

Low: 33 °F

Tuesday

Rain/Snow Likely Chance for Measurable Precipitation 60%

Rain/Snow
Likely

High: 38 °F

Tuesday
Night

Snow Likely Chance for Measurable Precipitation 60%

Snow
Likely

Low: 28 °F

Wednesday

Snow

Snow

High: 32 °F

Wednesday
Night

Chance Snow

Chance
Snow

Low: 24 °F

Detailed Forecast

  • Overnight Rain. Low around 39. Windy, with a west southwest wind around 50 mph, with gusts as high as 75 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
  • Sunday Snow. Temperature rising to near 42 by 11am, then falling to around 38 during the remainder of the day. 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.
  • Sunday Night Snow. Low around 34. Windy, with a west wind 26 to 32 mph, with gusts as high as 43 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
  • Monday A 40 percent chance of snow, mainly before 4pm. 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 chance of snow before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 33. West wind around 8 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
  • Tuesday Rain and snow likely, mainly after 10am. Mostly cloudy, with a high near 38. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
  • Tuesday Night Snow likely. Cloudy, with a low around 28. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
  • Wednesday Snow. Cloudy, with a high near 32. Breezy.
  • Wednesday Night A chance of snow showers. Mostly cloudy, with a low around 24. Blustery.
  • Christmas Day A chance of snow showers. Partly sunny, with a high near 28.
  • Thursday Night A slight chance of snow showers. Mostly cloudy, with a low around 23.
  • Friday Partly sunny, with a high near 31.
  • Friday Night A slight chance of snow. Mostly cloudy, with a low around 25.
  • Saturday A chance of snow. Partly sunny, with a high near 31.