National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Hazardous Weather Conditions

Current conditions at

Portland, Portland-Troutdale Airport (KTTD)

Lat: 45.55111°NLon: 122.40889°WElev: 36.0ft.

Overcast

63°F

17°C

Humidity 42%
Wind Speed E 5 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 11 Oct 04:15 PM PDT
Extended Forecast for

4 Miles NNW Troutdale OR

Frost Advisory October 12, 12:00am until October 12, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: Areas of frost after 4am. Otherwise, mostly clear, with a low around 35. Light and variable wind.

    Low: 35 °F

    Mostly Clear
    then Areas
    Frost

  • Columbus Day

    Columbus Day: Areas of frost before 9am. Otherwise, sunny, with a high near 66. Calm wind becoming west northwest around 5 mph.

    High: 66 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. Calm wind.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 76. Breezy.

    High: 76 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. Breezy.

    Low: 54 °F

    Mostly Clear
    and Breezy

Detailed Forecast

Tonight
Areas of frost after 4am. Otherwise, mostly clear, with a low around 35. Light and variable wind.
Columbus Day
Areas of frost before 9am. Otherwise, sunny, with a high near 66. Calm wind becoming west northwest around 5 mph.
Monday Night
Mostly clear, with a low around 38. Calm wind.
Tuesday
Mostly sunny, with a high near 66. Calm wind.
Tuesday Night
Partly cloudy, with a low around 44. Calm wind.
Wednesday
Mostly sunny, with a high near 69.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 76. Breezy.
Thursday Night
Mostly clear, with a low around 54. Breezy.
Friday
Sunny, with a high near 77. Breezy.
Friday Night
Mostly clear, with a low around 49.
Saturday
A slight chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 68.
Saturday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 46.
Sunday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Troutdale OR
 45.6°N 122.44°W (Elev. 335 ft)
Last Update:
3:41 pm PDT Oct 11, 2026
Forecast Valid:
4pm PDT Oct 11, 2026-6pm PDT Oct 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation