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

54°F

12°C

Humidity 93%
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 09 Dec 09:52 PM PST
Extended Forecast for

9 Miles WNW Illinois Valley OR

  • Tonight

    Tonight: A slight chance of rain before midnight, then a slight chance of rain after 4am.  Mostly cloudy, with a low around 46. Southwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 20%.

    Low: 46 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A 10 percent chance of rain before 8am.  Patchy dense fog after 4pm.  Otherwise, mostly sunny, with a high near 54. Calm wind becoming northwest around 5 mph.

    High: 54 °F

    Slight Chance
    Rain then
    Patchy Dense
    Fog

  • Wednesday Night

    Wednesday Night: Patchy fog before 9pm.  Otherwise, mostly clear, with a low around 41. Light west wind.

    Low: 41 °F

    Patchy Fog
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny, with a high near 54. East northeast wind around 6 mph becoming calm  in the afternoon.

    High: 54 °F

    Sunny

  • Thursday Night

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

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 56.

    High: 56 °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 55.

    High: 55 °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 slight chance of rain before midnight, then a slight chance of rain after 4am. Mostly cloudy, with a low around 46. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
A 10 percent chance of rain before 8am. Patchy dense fog after 4pm. Otherwise, mostly sunny, with a high near 54. Calm wind becoming northwest around 5 mph.
Wednesday Night
Patchy fog before 9pm. Otherwise, mostly clear, with a low around 41. Light west wind.
Thursday
Sunny, with a high near 54. East northeast wind around 6 mph becoming calm in the afternoon.
Thursday Night
Mostly clear, with a low around 42. East northeast wind 6 to 8 mph.
Friday
Sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 41.
Saturday
Sunny, with a high near 55.
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 49.
Sunday Night
Rain likely. Mostly cloudy, with a low around 43.
Monday
Rain. Mostly cloudy, with a high near 47.
Monday Night
Rain. Mostly cloudy, with a low around 44.
Tuesday
Rain likely. Snow level 6200 feet. Mostly cloudy, with a high near 46.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WNW Illinois Valley OR
 42.15°N 123.85°W (Elev. 3356 ft)
9:41 pm PST Dec 9, 2025
10pm 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