Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

72°F

22°C

Humidity 84%
Wind Speed NW 5 mph
Barometer 30.02 in (1016.3 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 17 Aug 8:54 pm CDT
Extended Forecast for

Whiteside MO

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 62. Calm wind.

    Low: 62 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Increasing clouds, with a high near 85. Calm wind becoming southwest around 6 mph in the morning.

    High: 85 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Increasing clouds, with a low around 68. Light and variable wind becoming northwest around 6 mph after midnight.

    Low: 68 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm.  Cloudy through mid morning, then becoming mostly sunny, with a high near 81. Southeast wind around 5 mph becoming light and variable  in the morning.

    High: 81 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 65. Light northeast wind.

    Low: 65 °F

    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after 1am.  Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 62. Calm wind.
Tuesday
Increasing clouds, with a high near 85. Calm wind becoming southwest around 6 mph in the morning.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 68. Light and variable wind becoming northwest around 6 mph after midnight.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Cloudy through mid morning, then becoming mostly sunny, with a high near 81. Southeast wind around 5 mph becoming light and variable in the morning.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 65. Light northeast wind.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 83.
Friday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 65.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Whiteside MO
 39.17°N 91.01°W (Elev. 712 ft)
6:11 pm CDT Aug 17, 2026
9pm CDT Aug 17, 2026-6pm CDT Aug 24, 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