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 SE Mount St Helens WA

7 Day Forecast

For More Weather Information:

Portland, OR Local Forecast Office

Tonight

Rain Chance for Measurable Precipitation 100%

Rain

Low: 48 °F

Sunday

Rain Chance for Measurable Precipitation 100%

Rain

High: 48 °FFalling Temperatures

Sunday
Night

Snow Chance for Measurable Precipitation 90%

Snow

Low: 38 °F

Monday

Chance Rain/Snow Chance for Measurable Precipitation 40%

Chance
Rain/Snow

High: 44 °F

Monday
Night

Chance Rain Chance for Measurable Precipitation 30%

Chance
Rain

Low: 36 °F

Tuesday

Rain Likely Chance for Measurable Precipitation 60%

Rain
Likely

High: 44 °F

Tuesday
Night

Rain Likely Chance for Measurable Precipitation 60%

Rain
Likely

Low: 32 °F

Wednesday

Snow

Snow

High: 38 °F

Wednesday
Night

Chance Snow

Chance
Snow

Low: 28 °F

Detailed Forecast

  • Tonight Rain. Steady temperature around 48. West southwest wind around 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
  • Sunday Rain. Temperature rising to near 48 by 11am, then falling to around 44 during the remainder of the day. Breezy, with a west wind 24 to 29 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
  • Sunday Night Snow. Low around 38. Breezy, with a west wind 15 to 24 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
  • Monday A chance of snow before 4pm, then a chance of rain and snow. Mostly cloudy, with a high near 44. West wind 5 to 10 mph becoming light in the morning. Chance of precipitation is 40%. Little or no snow accumulation expected.
  • Monday Night A 30 percent chance of rain, mainly after 10pm. Mostly cloudy, with a low around 36. Light west wind.
  • Tuesday Rain likely, mainly after 10am. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.
  • Tuesday Night Rain likely. Cloudy, with a low around 32. Chance of precipitation is 60%.
  • Wednesday Snow. Cloudy, with a high near 38.
  • Wednesday Night A chance of snow showers. Mostly cloudy, with a low around 28.
  • Christmas Day A chance of snow showers. Partly sunny, with a high near 33.
  • Thursday Night A slight chance of snow showers. Mostly cloudy, with a low around 27.
  • Friday Partly sunny, with a high near 35.
  • Friday Night A slight chance of snow. Mostly cloudy, with a low around 26.
  • Saturday A chance of snow. Partly sunny, with a high near 35.