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

8 Miles WNW Illinois Valley OR

  • Tonight

    Tonight: A 40 percent chance of rain, mainly before 4am.  Mostly cloudy, with a low around 46. West southwest wind around 6 mph becoming calm  in the evening.

    Low: 46 °F

    Chance Rain
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Patchy dense fog after 4pm.  Otherwise, mostly sunny, with a high near 55. West wind around 5 mph becoming calm  in the morning.

    High: 55 °F

    Mostly Sunny
    then Patchy
    Dense Fog

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41. Light west southwest wind.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 54. East northeast wind around 5 mph becoming calm  in the afternoon.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. East wind 6 to 8 mph.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain after 10pm.  Mostly cloudy, with a low around 42.

    Low: 42 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
A 40 percent chance of rain, mainly before 4am. Mostly cloudy, with a low around 46. West southwest wind around 6 mph becoming calm in the evening.
Wednesday
Patchy dense fog after 4pm. Otherwise, mostly sunny, with a high near 55. West wind around 5 mph becoming calm in the morning.
Wednesday Night
Mostly clear, with a low around 41. Light west southwest wind.
Thursday
Sunny, with a high near 54. East northeast wind around 5 mph becoming calm in the afternoon.
Thursday Night
Mostly clear, with a low around 42. East wind 6 to 8 mph.
Friday
Sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 41.
Saturday
Sunny, with a high near 56.
Saturday Night
A slight chance of rain after 10pm. Mostly cloudy, with a low around 42.
Sunday
A chance of rain. Partly sunny, with a high near 50.
Sunday Night
Rain likely. Mostly cloudy, with a low around 43.
Monday
Rain. Mostly cloudy, with a high near 48.
Monday Night
Rain. Mostly cloudy, with a low around 44.
Tuesday
Rain likely. Snow level 6200 feet. Mostly cloudy, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles WNW Illinois Valley OR
 42.14°N 123.81°W (Elev. 3209 ft)
3:41 pm PST Dec 9, 2025
6pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database