Lala Impacting Hawaii; Flash Flooding Risks; Excessive Heat

Lala will continue to impact Hawaii through the weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Thunderstorms, heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians and the mid-Atlantic through today. Record heat continues for areas of the Mississippi Valley into the Southeast. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

88°F

31°C

Humidity 66%
Wind Speed Calm
Barometer 30.00 in (1015.3 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 16 Aug 2:54 pm CDT
Extended Forecast for

4 Miles S St. Charles County Smartt Airport MO

Extreme Heat Warning August 16, 03:43pm until August 16, 09:00pm
Click here for hazard details and duration
...
  •  
    Extreme Heat Warning August 16, 03:43pm until August 16, 09:00pm

    NOW until 9:00pm Sun

    Extreme Heat Warning

  • Tonight

    Low: 71 °F

    T-storms
    Likely

  • Monday

    Monday: Mostly sunny, with a high near 85. North wind 6 to 8 mph.

    High: 85 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66. North wind around 5 mph becoming calm  in the evening.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. Light and variable wind.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am.  Partly cloudy, with a low around 71. Light and variable wind becoming southeast around 5 mph in the evening.  Chance of precipitation is 50%.

    Low: 71 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 87.

    High: 87 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly before 1pm.  Partly sunny, with a high near 83.

    High: 83 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before midnight. Increasing clouds, with a low around 71. North wind 5 to 8 mph. Chance of precipitation is 70%.
Monday
Mostly sunny, with a high near 85. North wind 6 to 8 mph.
Monday Night
Partly cloudy, with a low around 66. North wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 89. Light and variable wind.
Tuesday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 71. Light and variable wind becoming southeast around 5 mph in the evening. Chance of precipitation is 50%.
Wednesday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Thursday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 83.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S St. Charles County Smartt Airport MO
 38.87°N 90.45°W (Elev. 436 ft)
1:25 pm CDT Aug 16, 2026
3pm CDT Aug 16, 2026-6pm CDT Aug 23, 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