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

47°F

8°C

Humidity 97%
Wind Speed SW 0 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 09 Dec 11:52 PM PST
Extended Forecast for

11 Miles ESE Illinois Valley OR

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 47. South wind around 6 mph.

    Low: 47 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 53. Southeast wind 5 to 7 mph becoming calm  in the afternoon.

    High: 53 °F

    Sunny

  • Wednesday Night

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

    Low: 42 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 50. East southeast wind around 6 mph becoming calm  in the morning.

    High: 50 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. Southeast wind 5 to 7 mph.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 53.

    High: 53 °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 51.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain after 4am.  Snow level 7000 feet. Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 47. South wind around 6 mph.
Wednesday
Sunny, with a high near 53. Southeast wind 5 to 7 mph becoming calm in the afternoon.
Wednesday Night
Mostly clear, with a low around 42. South wind 6 to 8 mph.
Thursday
Sunny, with a high near 50. East southeast wind around 6 mph becoming calm in the morning.
Thursday Night
Mostly clear, with a low around 43. Southeast wind 5 to 7 mph.
Friday
Sunny, with a high near 53.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 51.
Saturday Night
A slight chance of rain after 4am. Snow level 7000 feet. Partly cloudy, with a low around 41.
Sunday
A chance of rain, mainly after 10am. Snow level 6900 feet. Partly sunny, with a high near 45.
Sunday Night
A chance of rain. Snow level 7200 feet. Mostly cloudy, with a low around 39.
Monday
Rain. Snow level 7600 feet rising to 8100 feet in the afternoon. Mostly cloudy, with a high near 46.
Monday Night
Rain. Snow level 7800 feet lowering to 7200 feet after midnight . Mostly cloudy, with a low around 39.
Tuesday
Rain likely. Snow level 6400 feet. Mostly cloudy, with a high near 43.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles ESE Illinois Valley OR
 42.03°N 123.48°W (Elev. 5197 ft)
10:36 pm PST Dec 9, 2025
12am PST Dec 10, 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