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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17 Miles SE Mount St Helens WA

7 Day Forecast

For More Weather Information:

Portland, OR Local Forecast Office

Late
Afternoon

Rain Chance for Measurable Precipitation 90%

Rain

High: 46 °F

Tonight

Rain Chance for Measurable Precipitation 90%

Rain

Low: 41 °F

Monday

Chance Rain Chance for Measurable Precipitation 40%

Chance
Rain

High: 46 °F

Monday
Night

Chance Rain Chance for Measurable Precipitation 40%

Chance
Rain

Low: 37 °F

Tuesday

Rain Likely Chance for Measurable Precipitation 60%

Rain
Likely

High: 46 °F

Tuesday
Night

Rain Chance for Measurable Precipitation 80%

Rain

Low: 36 °F

Wednesday

Rain Chance for Measurable Precipitation 90%

Rain

High: 41 °F

Wednesday
Night

Rain/Snow Likely

Rain/Snow
Likely

Low: 32 °F

Christmas
Day

Chance Snow

Chance
Snow

High: 39 °F

Detailed Forecast

  • Late Afternoon Rain. Steady temperature around 46. West wind around 10 mph. Chance of precipitation is 90%.
  • Tonight Rain, mainly before 4am. Low around 41. West wind 3 to 8 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 46. West northwest wind 3 to 6 mph.
  • Monday Night A 40 percent chance of rain. Mostly cloudy, with a low around 37. Calm wind becoming southeast around 5 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. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
  • Tuesday Night Rain. Low around 36. Chance of precipitation is 80%.
  • Wednesday Rain. High near 41. Chance of precipitation is 90%.
  • Wednesday Night Rain and snow showers likely. Mostly cloudy, with a low around 32.
  • Christmas Day A chance of snow showers. Mostly cloudy, with a high near 39.
  • Thursday Night A chance of snow showers. Mostly cloudy, with a low around 29.
  • Friday A chance of snow showers. Partly sunny, with a high near 39.
  • Friday Night Mostly cloudy, with a low around 28.
  • Saturday A slight chance of showers. Partly sunny, with a high near 40.
  • Saturday Night A chance of rain showers. Mostly cloudy, with a low around 28.
  • Sunday A chance of snow showers. Partly sunny, with a high near 38.