Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

34°F

1°C

Humidity 97%
Wind Speed ESE 0 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 28 Dec 08:52 AM PST
Extended Forecast for

14 Miles SE Agness OR

  • Today

    Today: Mostly sunny, with a high near 46. East wind around 7 mph.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 38. East northeast wind around 7 mph.

    Low: 38 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 51. East wind around 6 mph.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. East wind around 7 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 54. East southeast wind 3 to 6 mph.

    High: 54 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: A chance of rain.  Mostly cloudy, with a high near 49.

    High: 49 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 46. East wind around 7 mph.
Tonight
Partly cloudy, with a low around 38. East northeast wind around 7 mph.
Monday
Sunny, with a high near 51. East wind around 6 mph.
Monday Night
Mostly clear, with a low around 39. East wind around 7 mph.
Tuesday
Sunny, with a high near 54. East southeast wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 39.
Wednesday
Partly sunny, with a high near 52.
Wednesday Night
Mostly cloudy, with a low around 40.
New Year's Day
A chance of rain. Mostly cloudy, with a high near 49.
Thursday Night
Rain likely. Snow level 5600 feet. Mostly cloudy, with a low around 41.
Friday
Rain. Snow level 4600 feet. Mostly cloudy, with a high near 46.
Friday Night
Rain and snow likely. Snow level 3900 feet. Mostly cloudy, with a low around 37.
Saturday
A chance of rain and snow. Snow level 3700 feet. Mostly cloudy, with a high near 44.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
14 Miles SE Agness OR
 42.42°N 123.87°W (Elev. 2461 ft)
9:41 am PST Dec 28, 2025
9am PST Dec 28, 2025-6pm PST Jan 3, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database