National Weather Service United States Department of Commerce

Arctic air to drop temperatures across the northern Plain and northern Rockies; will bring snow to the Intermountain West

An arctic front is forecast to plunge through the northern Plains and northern Rockies on Saturday bringing a drastic drop in temperatures across these areas with a burst of snow over much of the Intermountain Region. Arctic air will also filter into the Pacific Northwest bringing with it snow showers and subfreezing low temperatures.
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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 Chance for Measurable Precipitation 80%

Snow

Low: 24 °F

Saturday

Snow Chance for Measurable Precipitation 80%

Snow

High: 24 °F

Saturday
Night

Partly Cloudy

Partly
Cloudy

Low: 18 °F

Sunday

Sunny

Sunny

High: 28 °F

Sunday
Night

Partly Cloudy

Partly
Cloudy

Low: 25 °F

Monday

Chance Snow Chance for Measurable Precipitation 50%

Chance
Snow

High: 34 °F

Monday
Night

Chance Snow Chance for Measurable Precipitation 50%

Chance
Snow

Low: 24 °F

Tuesday

Slight Chance Snow

Slight Chc
Snow

High: 34 °F

Tuesday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 28 °F

Detailed Forecast

  • Overnight Snow showers. Steady temperature around 24. Breezy, with a west wind around 22 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.
  • Saturday Snow showers, mainly before 10am. High near 24. West wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
  • Saturday Night Partly cloudy, with a low around 18. Light and variable wind becoming east 6 to 11 mph in the evening.
  • Sunday Sunny, with a high near 28. East wind around 17 mph, with gusts as high as 23 mph.
  • Sunday Night Partly cloudy, with a low around 25. East wind 13 to 17 mph, with gusts as high as 23 mph.
  • Monday A 50 percent chance of snow. Mostly cloudy, with a high near 34. Little or no snow accumulation expected.
  • Monday Night A 50 percent chance of snow. Mostly cloudy, with a low around 24. Little or no snow accumulation expected.
  • Tuesday A slight chance of snow showers. Partly sunny, with a high near 34.
  • Tuesday Night Mostly cloudy, with a low around 28.
  • Wednesday A slight chance of snow showers. Mostly cloudy, with a high near 37.
  • Wednesday Night A chance of snow. Cloudy, with a low around 29.
  • Thursday A chance of snow. Cloudy, with a high near 36.
  • Thursday Night Snow likely. Cloudy, with a low around 29.
  • Friday A chance of snow. Cloudy, with a high near 37.