Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Hazardous Weather Conditions

Current conditions at

Clinton Municipal Airport (KCWI)

Lat: 41.83°NLon: 90.33°WElev: 696ft.

Fair

0°F

-18°C

Humidity 83%
Wind Speed W 3 mph
Barometer 30.35 in (1030.2 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Last update 20 Jan 5:56 am CST
Extended Forecast for

Thomson IL

  • Today

    Today: Increasing clouds, with a high near 22. Wind chill values as low as -10. West wind 5 to 10 mph becoming south in the afternoon.

    High: 22 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow likely, mainly after 10pm.  Cloudy, with a temperature rising to around 24 by 2am. Southeast wind 5 to 10 mph becoming northwest after midnight.  Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 19 °F

    Snow Likely

  • Wednesday

    Wednesday: Patchy blowing snow after 4pm. Mostly sunny, with a high near 29. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 29 °F

    Mostly Sunny
    then Patchy
    Blowing Snow

  • Wednesday Night

    Wednesday Night: A 40 percent chance of snow showers before midnight.  Patchy blowing snow before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 9. Wind chill values as low as -5. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 9 °F

    Chance Snow
    Showers and
    Patchy
    Blowing Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -9.

    Low: -9 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -2.

    High: -2 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -10.

    Low: -10 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy and cold, with a high near 4.

    High: 4 °F

    Cold

Detailed Forecast

Today
Increasing clouds, with a high near 22. Wind chill values as low as -10. West wind 5 to 10 mph becoming south in the afternoon.
Tonight
Snow likely, mainly after 10pm. Cloudy, with a temperature rising to around 24 by 2am. Southeast wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Wednesday
Patchy blowing snow after 4pm. Mostly sunny, with a high near 29. West wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
A 40 percent chance of snow showers before midnight. Patchy blowing snow before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 9. Wind chill values as low as -5. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday
Mostly sunny, with a high near 21.
Thursday Night
Partly cloudy, with a low around -9.
Friday
Mostly sunny and cold, with a high near -2.
Friday Night
Mostly cloudy, with a low around -10.
Saturday
Mostly cloudy and cold, with a high near 4.
Saturday Night
Mostly cloudy, with a low around -5.
Sunday
Mostly sunny, with a high near 15.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Sunny, with a high near 17.
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ABOUT THIS FORECAST

 
Point Forecast:
Thomson IL
 41.96°N 90.1°W (Elev. 607 ft)
5:16 am CST Jan 20, 2026
6am CST Jan 20, 2026-6pm CST Jan 26, 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