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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3 Miles S Mount St Helens WA

7 Day Forecast

For More Weather Information:

Portland, OR Local Forecast Office

Tonight

Rain Chance for Measurable Precipitation 90%

Rain

Low: 41 °F

Monday

Chance Rain Chance for Measurable Precipitation 40%

Chance
Rain

High: 45 °F

Monday
Night

Chance Rain Chance for Measurable Precipitation 40%

Chance
Rain

Low: 39 °F

Tuesday

Rain Likely Chance for Measurable Precipitation 60%

Rain
Likely

High: 46 °F

Tuesday
Night

Rain Chance for Measurable Precipitation 80%

Rain

Low: 37 °F

Wednesday

Rain/Snow Chance for Measurable Precipitation 90%

Rain/Snow

High: 40 °F

Wednesday
Night

Snow Chance for Measurable Precipitation 80%

Snow

Low: 31 °F

Christmas
Day

Chance Snow

Chance
Snow

High: 36 °F

Thursday
Night

Chance Snow

Chance
Snow

Low: 30 °F

Detailed Forecast

  • Tonight Rain, mainly before 4am. Low around 41. West wind 11 to 16 mph becoming light after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
  • Monday A 40 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 45. West northwest wind 5 to 7 mph becoming calm in the morning.
  • Monday Night A 40 percent chance of rain. Mostly cloudy, with a low around 39. Calm wind becoming south southeast around 6 mph after midnight. New precipitation amounts of less than a tenth of an inch possible.
  • Tuesday Rain likely, mainly after 10am. Mostly cloudy, with a high near 46. South wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
  • Tuesday Night Rain. Low around 37. Southwest wind 5 to 13 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
  • Wednesday Rain before 10am, then snow. High near 40. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
  • Wednesday Night Snow showers. Low around 31. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
  • Christmas Day A chance of snow showers. Mostly cloudy, with a high near 36.
  • Thursday Night A chance of snow showers. Mostly cloudy, with a low around 30.
  • Friday A chance of snow showers. Partly sunny, with a high near 38.
  • Friday Night Mostly cloudy, with a low around 28.
  • Saturday A chance of rain showers. Partly sunny, with a high near 39.
  • Saturday Night A chance of rain and snow showers. Mostly cloudy, with a low around 29.
  • Sunday A chance of snow showers. Partly sunny, with a high near 37.