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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

Portland, Portland-Troutdale Airport (KTTD)

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

Clear

43°F

6°C

Humidity 93%
Wind Speed E 14 MPH
Barometer 29.69 in (1005.42 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 25 Dec 09:35 PM PST
Extended Forecast for

4 Miles ENE Troutdale OR

  • Tonight

    Tonight: Showers likely, mainly after 3am. Mostly cloudy, with a steady temperature around 42. East wind around 7 mph. Chance of precipitation is 60%.

    Low: 42 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Rain. High near 46. Breezy, with a west southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 46 °F

    Rain and
    Breezy

  • Friday Night

    Friday Night: Rain, mainly before 4am. Snow level 1500 feet. Low around 37. Breezy, with a west southwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Rain and
    Breezy

  • Saturday

    Saturday: A chance of rain before 10am, then a slight chance of showers after 10am. Snow level 1400 feet. Mostly cloudy, with a high near 44. West southwest wind 6 to 10 mph. Chance of precipitation is 50%.

    High: 44 °F

    Chance Rain
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Cloudy

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, partly sunny, with a high near 45.

    High: 45 °F

    Areas Frost
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers likely, mainly after 3am. Mostly cloudy, with a steady temperature around 42. East wind around 7 mph. Chance of precipitation is 60%.
Friday
Rain. High near 46. Breezy, with a west southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Rain, mainly before 4am. Snow level 1500 feet. Low around 37. Breezy, with a west southwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of rain before 10am, then a slight chance of showers after 10am. Snow level 1400 feet. Mostly cloudy, with a high near 44. West southwest wind 6 to 10 mph. Chance of precipitation is 50%.
Saturday Night
Mostly cloudy, with a low around 34. Calm wind.
Sunday
Areas of frost before 9am. Otherwise, partly sunny, with a high near 45.
Sunday Night
Mostly cloudy, with a low around 34.
Monday
Partly sunny, with a high near 46.
Monday Night
Mostly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 48.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 35.
Wednesday
A chance of rain. Mostly cloudy, with a high near 50.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 39.
New Year's Day
Rain likely. Cloudy, with a high near 48.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Troutdale OR
 45.58°N 122.31°W (Elev. 112 ft)
Last Update:
9:45 pm PST Dec 25, 2025
Forecast Valid:
9pm PST Dec 25, 2025-6pm PST Jan 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation