National Weather Service United States Department of Commerce

Active pattern for the Pacific Northwest this week while a coastal low takes aim on the Northeast later this week

Thunderstorms with heavy rainfall is forecast to bring 5 to 7 inches of rainfall, with localized heavier amounts, to the Pacific Northwest throughout the week. Across the higher mountain elevations, measurable snow is likely. The Northeast will also be the focus of showers and thunderstorms beginning mid-week as a coastal low meanders of the Mid-Atlantic coast.
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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

Snow Likely Chance for Measurable Precipitation 70%

Snow
Likely

Low: 40 °F

Tuesday

Snow Likely Chance for Measurable Precipitation 60%

Snow
Likely

High: 44 °F

Tuesday
Night

Rain/Snow Chance for Measurable Precipitation 100%

Rain/Snow

Low: 40 °F

Wednesday

Heavy Rain Chance for Measurable Precipitation 100%

Heavy
Rain

High: 46 °F

Wednesday
Night

Rain Chance for Measurable Precipitation 100%

Rain

Low: 40 °F

Thursday

Snow Chance for Measurable Precipitation 100%

Snow

High: 42 °F

Thursday
Night

Snow Chance for Measurable Precipitation 80%

Snow

Low: 36 °F

Friday

Snow Likely

Snow
Likely

High: 46 °F

Friday
Night

Rain Likely

Rain
Likely

Low: 35 °F

Detailed Forecast

  • Overnight Snow showers likely. Mostly cloudy, with a low around 40. South southwest wind around 10 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
  • Tuesday Snow likely, mainly before 11am. Mostly cloudy, with a high near 44. South wind around 10 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
  • Tuesday Night Rain and snow likely before 11pm, then rain. Low around 40. Breezy, with a south wind 14 to 23 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
  • Wednesday Rain. The rain could be heavy at times. High near 46. Breezy, with a south wind around 23 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
  • Wednesday Night Rain. Low around 40. Breezy, with a south southwest wind 22 to 24 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
  • Thursday Snow. High near 42. Chance of precipitation is 100%. Little or no snow accumulation expected.
  • Thursday Night Snow showers. Low around 36. Chance of precipitation is 80%. Little or no snow accumulation expected.
  • Friday Snow likely. Cloudy, with a high near 46.
  • Friday Night Rain likely. Cloudy, with a low around 35. Breezy.
  • Saturday A chance of snow showers. Mostly cloudy, with a high near 49.
  • Saturday Night Snow showers likely. Cloudy, with a low around 34. Breezy.
  • Sunday Snow showers likely. Cloudy, with a high near 44.
  • Sunday Night A chance of snow showers. Mostly cloudy, with a low around 33.
  • Monday A chance of snow showers. Mostly cloudy, with a high near 42.