Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Portland, Portland-Troutdale Airport (KTTD)

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

Overcast

52°F

11°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.2 in (1022.69 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 08 Dec 03:55 AM PST
Extended Forecast for

5 Miles SE Troutdale OR

Flood Watch December 8, 10:00am until December 12, 04:00am
Wind Advisory December 8, 07:00am until December 9, 04:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  • Overnight

    Overnight: Rain likely, mainly after 5am.  Cloudy, with a low around 49. South wind around 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%.

    Low: 49 °F

    Rain Likely

  • Monday

    Monday: Rain.  High near 54. Windy, with a south southwest wind 20 to 22 mph, with gusts as high as 37 mph.  Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 54 °F

    Rain and
    Windy

  • Monday Night

    Monday Night: Rain. The rain could be heavy at times.  Low around 48. Windy, with a south southwest wind 22 to 25 mph, with gusts as high as 44 mph.  Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    Low: 48 °F

    Heavy Rain
    and Windy

  • Tuesday

    Tuesday: Rain. The rain could be heavy at times.  High near 55. South southwest wind 10 to 14 mph, with gusts as high as 20 mph.  Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    High: 55 °F

    Heavy Rain

  • Tuesday Night

    Tuesday Night: Rain.  Low around 52. Windy, with a southwest wind 18 to 22 mph, with gusts as high as 37 mph.  Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    Low: 52 °F

    Rain and
    Windy

  • Wednesday

    Wednesday: Rain.  High near 56. Windy.  Chance of precipitation is 100%.

    High: 56 °F

    Rain and
    Windy

  • Wednesday Night

    Wednesday Night: Rain.  Low around 53. Breezy.  Chance of precipitation is 90%.

    Low: 53 °F

    Rain and
    Breezy

  • Thursday

    Thursday: Rain, mainly before 4pm.  Mostly cloudy, with a high near 57.

    High: 57 °F

    Rain

  • Thursday Night

    Thursday Night: A chance of rain, mainly before 10pm.  Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance Rain

Detailed Forecast

Overnight
Rain likely, mainly after 5am. Cloudy, with a low around 49. South wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Monday
Rain. High near 54. Windy, with a south southwest wind 20 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Rain. The rain could be heavy at times. Low around 48. Windy, with a south southwest wind 22 to 25 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Tuesday
Rain. The rain could be heavy at times. High near 55. South southwest wind 10 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Tuesday Night
Rain. Low around 52. Windy, with a southwest wind 18 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Wednesday
Rain. High near 56. Windy. Chance of precipitation is 100%.
Wednesday Night
Rain. Low around 53. Breezy. Chance of precipitation is 90%.
Thursday
Rain, mainly before 4pm. Mostly cloudy, with a high near 57.
Thursday Night
A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 49.
Friday
A slight chance of rain before 10am. Partly sunny, with a high near 56.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 45.
Saturday
A chance of rain. Partly sunny, with a high near 54.
Saturday Night
Rain likely. Mostly cloudy, with a low around 45.
Sunday
Rain likely. Mostly cloudy, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Troutdale OR
 45.49°N 122.32°W (Elev. 600 ft)
3:46 am PST Dec 8, 2025
4am PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database