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

53°F

12°C

Humidity 93%
Wind Speed S 2 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 09 Dec 07:52 PM PST
Extended Forecast for

17 Miles WNW Illinois Valley OR

  • Tonight

    Tonight: A 40 percent chance of rain, mainly before 11pm.  Mostly cloudy, with a low around 48. Southwest wind 5 to 10 mph becoming light south  after midnight.

    Low: 48 °F

    Chance Rain
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain before 11am.  Mostly sunny, with a high near 52. West wind 3 to 5 mph.

    High: 52 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain.  Snow level 6900 feet. Partly cloudy, with a low around 43. South southwest wind around 6 mph becoming east northeast after midnight.

    Low: 43 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: Sunny, with a high near 52. Northeast wind 3 to 8 mph.

    High: 52 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. East northeast wind 11 to 14 mph.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 55.

    High: 55 °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 54.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain after 10pm.  Snow level 7000 feet. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 48. Southwest wind 5 to 10 mph becoming light south after midnight.
Wednesday
A 20 percent chance of rain before 11am. Mostly sunny, with a high near 52. West wind 3 to 5 mph.
Wednesday Night
A 20 percent chance of rain. Snow level 6900 feet. Partly cloudy, with a low around 43. South southwest wind around 6 mph becoming east northeast after midnight.
Thursday
Sunny, with a high near 52. Northeast wind 3 to 8 mph.
Thursday Night
Mostly clear, with a low around 44. East northeast wind 11 to 14 mph.
Friday
Sunny, with a high near 55.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 54.
Saturday Night
A slight chance of rain after 10pm. Snow level 7000 feet. Mostly cloudy, with a low around 43.
Sunday
A chance of rain. Snow level 6900 feet. Partly sunny, with a high near 47.
Sunday Night
Rain likely. Snow level 7200 feet. Mostly cloudy, with a low around 43.
Monday
Rain. Mostly cloudy, with a high near 48.
Monday Night
Rain. Snow level 7600 feet lowering to 6900 feet after midnight . Mostly cloudy, with a low around 44.
Tuesday
Rain likely. Snow level 6100 feet. Mostly cloudy, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles WNW Illinois Valley OR
 42.18°N 123.98°W (Elev. 4344 ft)
3:41 pm PST Dec 9, 2025
8pm PST Dec 9, 2025-6pm PST Dec 16, 2025
 
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Additional Resources

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Hourly Weather Forecast

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