National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Snow Squalls May Impact the Northeast on Thursday; Dangerously Cold Arctic Air Impact the North-Central US

Snow showers and snow squalls are likely to develop across the Northeast on Thursday. Lake effect snow will persist downwind of the Great Lakes. An arctic blast will bring frigid temperatures, gusty winds and dangerous wind chills to the Northern Plains before expanding to the South and East. A major winter storm will begin impacting the Southern Plains and Lower Mississippi Valley Friday. Read More >

Hazardous Weather Conditions

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

33°F

1°C

Humidity 97%
Wind Speed S 1 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 21 Jan 07:52 PM PST
Extended Forecast for

17 Miles SSE Agness OR

Air Stagnation Advisory January 21, 08:44pm until January 23, 04:00pm
Freezing Fog Advisory until January 22, 12:00pm
Click here for hazard details and duration
Air Stagnation Advisory
Freezing Fog Advisory
  •  
    Air Stagnation Advisory January 21, 08:44pm until January 23, 04:00pm
    Freezing Fog Advisory until January 22, 12:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 57. East wind around 6 mph becoming calm.

    High: 57 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. Northeast wind 6 to 10 mph.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 51. Northeast wind around 10 mph.

    High: 51 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 40. East northeast wind around 15 mph, with gusts as high as 23 mph.

    Low: 40 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 45. East northeast wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 57. East wind around 6 mph becoming calm.
Thursday Night
Mostly clear, with a low around 42. Northeast wind 6 to 10 mph.
Friday
Sunny, with a high near 51. Northeast wind around 10 mph.
Friday Night
Clear, with a low around 40. East northeast wind around 15 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Partly sunny, with a high near 51.
Sunday Night
Mostly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
A slight chance of showers. Snow level 5100 feet. Mostly sunny, with a high near 54.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 43.
Wednesday
A chance of showers. Mostly cloudy, with a high near 51.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SSE Agness OR
 42.32°N 123.96°W (Elev. 2408 ft)
Last Update:
8:31 pm PST Jan 21, 2026
Forecast Valid:
8pm PST Jan 21, 2026-6pm PST Jan 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation