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

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Overcast

29°F

-2°C

Humidity 64%
Wind Speed SE 3 mph
Barometer 30.38 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 28 Nov 10:35 pm CST
Extended Forecast for

Tonica IL

Winter Storm Warning November 29, 03:00am until November 30, 06:00am
Click here for hazard details and duration
Winter Storm Warning

  • Tonight

    Tonight: Snow, mainly after 3am. Low around 25. Light southeast wind increasing to 5 to 10 mph after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 2 inches possible.

    Low: 25 °F

    Cloudy then
    Snow

  • Saturday

    Saturday: Snow. The snow could be heavy at times. Patchy blowing snow after noon. High near 32. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    High: 32 °F

    Heavy Snow
    and Patchy
    Blowing Snow

  • Saturday Night

    Saturday Night: Snow. Patchy blowing snow before 9pm, then patchy blowing snow after 3am. Low around 25. Blustery, with a south wind 10 to 15 mph becoming west northwest 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 25 °F

    Snow and
    Patchy
    Blowing Snow

  • Sunday

    Sunday: A chance of snow before noon, then a slight chance of snow showers after noon. Patchy blowing snow before 3pm. Mostly cloudy, with a high near 27. Blustery, with a west northwest wind 15 to 20 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%.

    High: 27 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 7. West northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.

    Low: 7 °F

    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 21.

    High: 21 °F

    Mostly Cloudy
    then Chance
    Snow

  • Monday Night

    Monday Night: A 50 percent chance of snow before midnight. Mostly cloudy, with a low around 11.

    Low: 11 °F

    Chance Snow
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 22.

    High: 22 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 13.

    Low: 13 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Snow, mainly after 3am. Low around 25. Light southeast wind increasing to 5 to 10 mph after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 2 inches possible.
Saturday
Snow. The snow could be heavy at times. Patchy blowing snow after noon. High near 32. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.
Saturday Night
Snow. Patchy blowing snow before 9pm, then patchy blowing snow after 3am. Low around 25. Blustery, with a south wind 10 to 15 mph becoming west northwest 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Sunday
A chance of snow before noon, then a slight chance of snow showers after noon. Patchy blowing snow before 3pm. Mostly cloudy, with a high near 27. Blustery, with a west northwest wind 15 to 20 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 7. West northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.
Monday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 21.
Monday Night
A 50 percent chance of snow before midnight. Mostly cloudy, with a low around 11.
Tuesday
Partly sunny, with a high near 22.
Tuesday Night
Mostly cloudy, with a low around 13.
Wednesday
Partly sunny, with a high near 30.
Wednesday Night
Mostly cloudy, with a low around 8.
Thursday
Mostly sunny, with a high near 19.
Thursday Night
Mostly cloudy, with a low around 5.
Friday
Partly sunny, with a high near 28.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tonica IL
 41.21°N 89.06°W
Last Update:
9:51 pm CST Nov 28, 2025
Forecast Valid:
10pm CST Nov 28, 2025-6pm CST Dec 5, 2025
 
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