Severe Thunderstorms in the Central U.S.; Heavy to Excessive Rainfall in the Ohio Valley and Central Appalachians

Severe thunderstorms producing damaging winds, hail, and a few tornadoes are expected through Tuesday across parts of the central Plains and lower to mid Missouri Valley. Heavy to excessive rainfall could produce flooding across portions of the Ohio Valley into the Central Appalachians through Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

Clinton Municipal Airport (KCWI)

Lat: 41.83°NLon: 90.33°WElev: 696ft.

Fair

70°F

21°C

Humidity 87%
Wind Speed SE 5 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 16 Jun 8:56 pm CDT
Extended Forecast for

Lanark IL

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 69. Southwest wind around 5 mph.

    Low: 69 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 4pm, then showers and thunderstorms likely after 4pm.  Partly sunny, with a high near 86. Southwest wind 5 to 10 mph.  Chance of precipitation is 70%.

    High: 86 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms.  Low around 65. West wind around 5 mph becoming southeast after midnight.  Chance of precipitation is 80%.

    Low: 65 °F

    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm.  High near 80. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 80 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am.  Partly cloudy, with a low around 60. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Southwest wind around 5 mph.
Tuesday
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 86. Southwest wind 5 to 10 mph. Chance of precipitation is 70%.
Tuesday Night
Showers and thunderstorms. Low around 65. West wind around 5 mph becoming southeast after midnight. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 80. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Juneteenth
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 64.
Friday
Mostly sunny, with a high near 86.
Friday Night
Partly cloudy, with a low around 70.
Saturday
Sunny, with a high near 93.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 73.
Monday
A 30 percent chance of showers. Sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Lanark IL
 42.11°N 89.83°W (Elev. 883 ft)
8:47 pm CDT Jun 16, 2025
9pm CDT Jun 16, 2025-6pm CDT Jun 23, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database