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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2 Miles WSW Mount St Helens WA

7 Day Forecast

For More Weather Information:

Portland, OR Local Forecast Office

Late
Afternoon

Heavy Rain Chance for Measurable Precipitation 100%

Heavy
Rain

High: 40 °F

Tonight

Rain Chance for Measurable Precipitation 100%

Rain

Low: 39 °FRising Temperatures

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 Likely Chance for Measurable Precipitation 60%

Rain
Likely

High: 38 °F

Tuesday
Night

Snow Likely

Snow
Likely

Low: 29 °F

Wednesday

Snow

Snow

High: 33 °F

Detailed Forecast

  • Late Afternoon Rain. The rain could be heavy at times. High near 40. Southwest wind around 21 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
  • Tonight Rain. The rain could be heavy at times. Temperature rising to around 42 by 10pm. Breezy, with a west southwest wind 23 to 26 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
  • Sunday Snow. Temperature falling to around 39 by 4pm. Windy, with a west wind 32 to 38 mph, with gusts as high as 49 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%. New snow accumulation of around an inch possible.
  • Monday A 40 percent chance of snow, mainly before 4pm. Mostly cloudy, with a high near 39. West wind 7 to 15 mph, with gusts as high as 20 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. Chance of precipitation is 40%. Little or no snow accumulation expected.
  • Tuesday Rain likely, mainly after 10am. Mostly cloudy, with a high near 38. Chance of precipitation is 60%.
  • Tuesday Night Snow likely. Cloudy, with a low around 29.
  • Wednesday Snow. Cloudy, with a high near 33. Breezy.
  • Wednesday Night A chance of snow showers. Mostly cloudy, with a low around 25. Blustery.
  • Christmas Day A chance of snow showers. Partly sunny, with a high near 30.
  • Thursday Night A slight chance of snow showers. Mostly cloudy, with a low around 25.
  • Friday Partly sunny, with a high near 32.
  • Friday Night A slight chance of snow. Mostly cloudy, with a low around 27.
  • Saturday A chance of snow. Partly sunny, with a high near 32.