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 >

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Mark IL

  • Overnight

    Overnight: Snow likely, mainly after 4am.  Cloudy, with a steady temperature around 24. South wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 24 °F

    Snow Likely

  • Wednesday

    Wednesday: A chance of snow before 7am, then a slight chance of snow after 5pm.  Partly sunny, with a high near 32. West wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 30%.

    High: 32 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: A chance of snow before 10pm, then a chance of flurries between 10pm and 11pm.  Mostly cloudy, then gradually becoming mostly clear, with a low around 15. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 40%.

    Low: 15 °F

    Breezy.
    Chance Snow
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 25. West wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 25 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -5.

    Low: -5 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near 0.

    High: 0 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -6.

    Low: -6 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy and cold, with a high near 8.

    High: 8 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 2.

    Low: 2 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Snow likely, mainly after 4am. Cloudy, with a steady temperature around 24. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.
Wednesday
A chance of snow before 7am, then a slight chance of snow after 5pm. Partly sunny, with a high near 32. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of snow before 10pm, then a chance of flurries between 10pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 15. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Thursday
Mostly sunny, with a high near 25. West wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around -5.
Friday
Mostly sunny and cold, with a high near 0.
Friday Night
Mostly cloudy, with a low around -6.
Saturday
Mostly cloudy and cold, with a high near 8.
Saturday Night
Mostly cloudy, with a low around 2.
Sunday
Partly sunny, with a high near 15.
Sunday Night
Partly cloudy, with a low around 1.
Monday
Mostly sunny, with a high near 18.
Monday Night
Mostly clear, with a low around 7.
Tuesday
Mostly sunny, with a high near 28.
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ABOUT THIS FORECAST

 
Point Forecast:
Mark IL
 41.26°N 89.26°W (Elev. 699 ft)
9:41 pm CST Jan 20, 2026
12am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
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Additional Resources

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