Severe Thunderstorms and Heavy Rain Across the Central US and Central Appalachians

Severe thunderstorms producing damaging winds, hail and possibly a few tornadoes are expected across parts of the central Plains and the Missouri Valley. Heavy rainfall and flash flooding is also expected in the area. Thunderstorms and heavy rain may also bring additional flooding impacts to the central Appalachians. High temperatures and critical fire weather conditions expected in the Southwest. Read More >

Hazardous Weather Conditions

Current conditions at

Clinton Municipal Airport (KCWI)

Lat: 41.83°NLon: 90.33°WElev: 696ft.

Fair

81°F

27°C

Humidity 61%
Wind Speed W 10 mph
Barometer 29.84 in (1010.3 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 17 Jun 9:56 am CDT
Extended Forecast for

Lanark IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 4pm.  Mostly sunny, with a high near 87. Southwest wind around 10 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then showers and thunderstorms likely after 4am.  Mostly cloudy, with a low around 66. West wind around 5 mph becoming southeast after midnight.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    T-storms
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall.  High near 78. East wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    High: 78 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm.  Partly cloudy, with a low around 60. Northwest wind 5 to 10 mph.

    Low: 60 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 87. Southwest wind around 10 mph.
Tonight
Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then showers and thunderstorms likely after 4am. Mostly cloudy, with a low around 66. West wind around 5 mph becoming southeast after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. High near 78. East wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 60. Northwest wind 5 to 10 mph.
Juneteenth
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 65.
Friday
Mostly sunny, with a high near 88.
Friday Night
Partly cloudy, with a low around 72.
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
Sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Lanark IL
 42.11°N 89.83°W (Elev. 883 ft)
9:01 am CDT Jun 17, 2025
10am CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
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