Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

Lat: 41.77375°NLon: 122.46817°WElev: 2644.0ft.

Clear

28°F

-2°C

Humidity 92%
Wind Speed E 3 MPH
Barometer 30.2 in (1022.69 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 20 Jan 08:20 PM PST
Extended Forecast for

11 Miles NNW Yreka CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. East wind around 5 mph becoming calm  in the evening.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Patchy fog before 10am.  Otherwise, partly sunny, with a high near 57. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 57 °F

    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 10pm.  Otherwise, mostly cloudy, with a low around 29. East northeast wind 3 to 5 mph.

    Low: 29 °F

    Patchy Fog

  • Thursday

    Thursday: Areas of fog before 10am.  Otherwise, sunny, with a high near 57. Light north wind.

    High: 57 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. Light north northwest wind.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 35.

    Low: 35 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 28. East wind around 5 mph becoming calm in the evening.
Wednesday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 57. Calm wind becoming east southeast around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 29. East northeast wind 3 to 5 mph.
Thursday
Areas of fog before 10am. Otherwise, sunny, with a high near 57. Light north wind.
Thursday Night
Mostly clear, with a low around 28. Light north northwest wind.
Friday
Sunny, with a high near 54.
Friday Night
Clear, with a low around 35.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 26.
Sunday
Partly sunny, with a high near 52.
Sunday Night
Mostly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 54.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles NNW Yreka CA
 41.86°N 122.75°W (Elev. 2001 ft)
8:26 pm PST Jan 20, 2026
8pm PST Jan 20, 2026-6pm PST Jan 27, 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