Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Light Rain

73°F

23°C

Humidity 94%
Wind Speed SW 5 mph
Barometer 29.97 in (1013.9 mb)
Dewpoint 71°F (22°C)
Visibility 7.00 mi
Last update 19 Aug 4:54 am CDT
Extended Forecast for

2 Miles NNE Ballwin MO

  • Overnight

    Overnight: Showers and possibly a thunderstorm.  Low around 71. Southwest wind around 5 mph.  Chance of precipitation is 90%.

    Low: 71 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 10am, then scattered showers and thunderstorms, mainly between 10am and 1pm.  High near 81. West wind around 5 mph becoming calm  in the morning.  Chance of precipitation is 90%.

    High: 81 °F

    Showers then
    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Isolated showers and thunderstorms before 1am.  Mostly cloudy, with a low around 68. Light north wind.  Chance of precipitation is 20%.

    Low: 68 °F

    Isolated
    T-storms

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 84. Northeast wind 3 to 5 mph.

    High: 84 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. Light east wind.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 86.

    High: 86 °F

    Slight Chance
    T-storms

  • Saturday Night

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

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 71. Southwest wind around 5 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before 10am, then scattered showers and thunderstorms, mainly between 10am and 1pm. High near 81. West wind around 5 mph becoming calm in the morning. Chance of precipitation is 90%.
Wednesday Night
Isolated showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. Light north wind. Chance of precipitation is 20%.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 84. Northeast wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 67. Light east wind.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 68.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 66.
Monday
Partly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Ballwin MO
 38.61°N 90.54°W (Elev. 597 ft)
4:21 am CDT Aug 19, 2026
5am CDT Aug 19, 2026-6pm CDT Aug 25, 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