Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

Portland, Portland International Airport (KPDX)

Lat: 45.59578°NLon: 122.60917°WElev: 20.0ft.

light rain,mist

56°F

13°C

Humidity 93%
Wind Speed S 19 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 54°F (12°C)
Visibility 5.00 mi
Last update 08 Dec 02:53 PM PST
Extended Forecast for

2 Miles SW Portland OR

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

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 55 °F

    Rain and
    Breezy

  • Tonight

    Tonight: Rain, mainly after 8pm.  Low around 48. Windy, with a south southwest wind 21 to 26 mph, with gusts as high as 38 mph.  Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    Low: 48 °F

    Rain and
    Windy

  • Tuesday

    Tuesday: Rain.  High near 56. North northeast wind 7 to 10 mph becoming south southwest in the afternoon.  Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 56 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain.  Low around 51. Windy, with a south southwest wind 17 to 22 mph, with gusts as high as 31 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Rain and
    Windy

  • Wednesday

    Wednesday: Rain.  High near 57. Breezy, with a south southwest wind 14 to 17 mph, with gusts as high as 26 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 57 °F

    Rain and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain.  Low around 54. Breezy.  Chance of precipitation is 90%.

    Low: 54 °F

    Rain and
    Breezy

  • Thursday

    Thursday: Rain likely, mainly before 10am.  Cloudy, with a high near 56. Chance of precipitation is 70%.

    High: 56 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A chance of rain before 10pm.  Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

This Afternoon
Rain, mainly before 5pm. High near 55. Breezy, with a south southwest wind around 20 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain, mainly after 8pm. Low around 48. Windy, with a south southwest wind 21 to 26 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Tuesday
Rain. High near 56. North northeast wind 7 to 10 mph becoming south southwest in the afternoon. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Tuesday Night
Rain. Low around 51. Windy, with a south southwest wind 17 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain. High near 57. Breezy, with a south southwest wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Rain. Low around 54. Breezy. Chance of precipitation is 90%.
Thursday
Rain likely, mainly before 10am. Cloudy, with a high near 56. Chance of precipitation is 70%.
Thursday Night
A chance of rain before 10pm. Mostly cloudy, with a low around 51.
Friday
Mostly cloudy, with a high near 56.
Friday Night
Mostly cloudy, with a low around 47.
Saturday
A chance of rain. Mostly cloudy, with a high near 53.
Saturday Night
Rain likely. Mostly cloudy, with a low around 47.
Sunday
Rain likely. Mostly cloudy, with a high near 52.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Portland OR
 45.5°N 122.69°W (Elev. 522 ft)
2:41 pm PST Dec 8, 2025
3pm PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database