National Weather Service United States Department of Commerce

A stalled frontal boundary and ample monsoonal moisture will lead to flash flood potential from the Great Basin to the Great Plains tonight and Tuesday

A stalled frontal boundary will set up along the southern and central Rockies for the next couple of days providing focus for showers and thunderstorms. In addition, ample monsoonal moisture will stream in across the southwest bringing enough moisture to introduce a flash flood threat from the Great Basin and Southwest eastward across the central and southern Rockies into the adjacent Plains.
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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

Mostly Clear

Mostly
Clear

Low: 55 °F

Tuesday

Sunny

Sunny

High: 82 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 53 °F

Wednesday

Sunny

Sunny

High: 79 °F

Wednesday
Night

Mostly Clear

Mostly
Clear

Low: 53 °F

Thursday

Sunny

Sunny

High: 79 °F

Thursday
Night

Mostly Clear

Mostly
Clear

Low: 54 °F

Friday

Sunny

Sunny

High: 85 °F

Friday
Night

Mostly Clear

Mostly
Clear

Low: 49 °F

Detailed Forecast

  • Overnight Mostly clear, with a low around 55. North wind around 5 mph.
  • Tuesday Sunny, with a high near 82. Calm wind becoming northwest 5 to 8 mph in the afternoon.
  • Tuesday Night Mostly clear, with a low around 53. North northwest wind 5 to 10 mph becoming light in the evening.
  • Wednesday Sunny, with a high near 79. North northwest wind around 6 mph.
  • Wednesday Night Mostly clear, with a low around 53. North northwest wind 5 to 8 mph becoming south southwest in the evening.
  • Thursday Sunny, with a high near 79.
  • Thursday Night Mostly clear, with a low around 54.
  • Friday Sunny, with a high near 85.
  • Friday Night Mostly clear, with a low around 49.
  • Saturday Sunny, with a high near 74.
  • Saturday Night Mostly clear, with a low around 49.
  • Sunday Sunny, with a high near 79.
  • Sunday Night Partly cloudy, with a low around 49.
  • Monday Mostly sunny, with a high near 78.