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. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

68°F

20°C

Humidity 96%
Wind Speed SE 5 mph
Barometer 30.06 in (1017.4 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 18 Aug 12:53 am CDT
Extended Forecast for

Crystal City MO

  • Overnight

    Overnight: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90. Light southwest wind.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am.  Increasing clouds, with a low around 69. Southeast wind 3 to 5 mph.

    Low: 69 °F

    Clear then
    Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms, mainly before 1pm.  Mostly cloudy, with a high near 86. Southeast wind 5 to 8 mph becoming light and variable  in the afternoon.

    High: 86 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely.  Mostly cloudy, with a low around 66. Light northeast wind.  Chance of precipitation is 70%.

    Low: 66 °F

    T-storms
    Likely

  • Thursday

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

    High: 83 °F

    Chance
    T-storms

  • Thursday Night

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

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 63. Calm wind.
Tuesday
Sunny, with a high near 90. Light southwest wind.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 69. Southeast wind 3 to 5 mph.
Wednesday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 86. Southeast wind 5 to 8 mph becoming light and variable in the afternoon.
Wednesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 66. Light northeast wind. Chance of precipitation is 70%.
Thursday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 64.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 84.
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 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Crystal City MO
 38.22°N 90.39°W (Elev. 446 ft)
12:36 am CDT Aug 18, 2026
1am CDT Aug 18, 2026-6pm CDT Aug 24, 2026
 
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Additional Resources

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Hourly Weather Forecast

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