Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

79°F

26°C

Humidity 85%
Wind Speed W 3 mph
Barometer 29.91 in (1011.8 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 4 Sep 8:54 pm CDT
Extended Forecast for

Dardenne Prairie MO

Extreme Heat Warning September 4, 09:34pm until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 09:34pm until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 106. Light and variable wind.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73. Light and variable wind.

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 93. Northeast wind 3 to 6 mph.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. East wind 3 to 6 mph.

    Low: 67 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 76. Calm wind.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 106. Light and variable wind.
Saturday Night
Mostly clear, with a low around 73. Light and variable wind.
Sunday
Sunny, with a high near 93. Northeast wind 3 to 6 mph.
Sunday Night
Mostly clear, with a low around 67. East wind 3 to 6 mph.
Labor Day
Sunny, with a high near 90.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 73.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Dardenne Prairie MO
 38.77°N 90.74°W (Elev. 597 ft)
6:36 pm CDT Sep 4, 2026
9pm CDT Sep 4, 2026-6pm CDT Sep 11, 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