National Weather Service United States Department of Commerce

Cold Front Crossing the Central U.S.

A cold front over the Northern Rockies will move eastward to the Upper Mississippi Valley/Central Plains by Monday. Rain will develop along the boundary over the Upper Midwest and move into the Upper Great Lakes by Monday. Some of the thunderstorms could become severe in portions of Texas through Monday.
Read More...

Hazardous Weather Conditions

Current Conditions

En Español

Share |

Mount St Helens WA

7 Day Forecast

Portland, OR

NWS Weather Forecast Office

Tonight

Mostly Cloudy

Mostly
Cloudy

Low: 38 °F

Monday

Chance Rain/Snow Chance for Measurable Precipitation 40%

Chance
Rain/Snow

High: 55 °F

Monday
Night

Snow Chance for Measurable Precipitation 80%

Snow

Low: 33 °F

Tuesday

Snow Chance for Measurable Precipitation 90%

Snow

High: 41 °F

Tuesday
Night

Snow Chance for Measurable Precipitation 90%

Snow

Low: 32 °F

Wednesday

Snow Likely Chance for Measurable Precipitation 70%

Snow
Likely

High: 42 °F

Wednesday
Night

Snow Chance for Measurable Precipitation 90%

Snow

Low: 30 °F

Thursday

Snow

Snow

High: 43 °F

Thursday
Night

Snow

Snow

Low: 28 °F

Detailed Forecast

  • Tonight Mostly cloudy, with a low around 38. Southwest wind around 5 mph becoming south southeast after midnight.
  • Monday A chance of rain and snow showers before 11am, then a chance of snow showers. Mostly cloudy, with a high near 55. Southwest wind 6 to 11 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
  • Monday Night Snow showers. Low around 33. West wind around 10 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
  • Tuesday Snow showers. High near 41. West wind 8 to 10 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
  • Tuesday Night Snow showers. Low around 32. South southwest wind around 11 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
  • Wednesday Snow likely. Cloudy, with a high near 42. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
  • Wednesday Night Snow. Low around 30. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
  • Thursday Snow. Cloudy, with a high near 43.
  • Thursday Night Snow showers. Cloudy, with a low around 28.
  • Friday Snow showers likely. Cloudy, with a high near 43.
  • Friday Night Snow showers likely. Cloudy, with a low around 26.
  • Saturday Snow showers likely. Cloudy, with a high near 33.
  • Saturday Night Snow likely. Cloudy, with a low around 25.
  • Sunday Snow likely. Cloudy, with a high near 40.

 

Additional Forecasts and Information

Zone Area Forecast for South Washington Cascades, WA