Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10375°NLon: 123.68508°WElev: 1389.0ft.

NA

57°F

14°C

Humidity 85%
Wind Speed SW 2 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 09 Dec 05:52 PM PST
Extended Forecast for

17 Miles SSE Agness OR

  • Tonight

    Tonight: Rain likely, mainly before 11pm.  Mostly cloudy, with a low around 50. Light and variable wind.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Rain Likely
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: A 20 percent chance of rain before 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 55. Calm wind becoming west southwest around 5 mph.

    High: 55 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain.  Partly cloudy, with a low around 44. Light and variable wind.

    Low: 44 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: Sunny, with a high near 56. East wind 3 to 6 mph.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45. East wind 8 to 10 mph.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of rain after 10pm.  Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Tonight
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 50. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 20 percent chance of rain before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 55. Calm wind becoming west southwest around 5 mph.
Wednesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 44. Light and variable wind.
Thursday
Sunny, with a high near 56. East wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 45. East wind 8 to 10 mph.
Friday
Sunny, with a high near 60.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 58.
Saturday Night
A chance of rain after 10pm. Mostly cloudy, with a low around 44.
Sunday
A chance of rain. Partly sunny, with a high near 51.
Sunday Night
Rain likely. Mostly cloudy, with a low around 46.
Monday
Rain. Mostly cloudy, with a high near 50.
Monday Night
Rain. Mostly cloudy, with a low around 47.
Tuesday
Rain likely. Mostly cloudy, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SSE Agness OR
 42.32°N 123.96°W (Elev. 2408 ft)
3:41 pm PST Dec 9, 2025
6pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database