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 Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Light Rain

76°F

24°C

Humidity 85%
Wind Speed W 3 mph
Barometer 29.94 in (1012.6 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 19 Aug 3:51 am CDT
Extended Forecast for

2 Miles SSW Maryland Heights MO

  • Overnight

    Overnight: Showers and possibly a thunderstorm.  Low around 72. Calm wind.  Chance of precipitation is 90%.

    Low: 72 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 10am, then scattered showers and thunderstorms, mainly between 10am and 1pm.  High near 82. Light and variable wind becoming south around 5 mph.  Chance of precipitation is 80%.

    High: 82 °F

    Showers then
    Scattered
    Showers

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms, mainly before 10pm.  Mostly cloudy, with a low around 69. Light northeast wind.  Chance of precipitation is 30%.

    Low: 69 °F

    Scattered
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 85. Northeast wind 3 to 5 mph.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68. Light east wind.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 88.

    High: 88 °F

    Slight Chance
    T-storms

  • Saturday Night

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

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 72. Calm wind. 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 82. Light and variable wind becoming south around 5 mph. Chance of precipitation is 80%.
Wednesday Night
Scattered showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 69. Light northeast wind. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 85. Northeast wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 68. Light east wind.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 70.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 67.
Monday
Partly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Maryland Heights MO
 38.69°N 90.48°W (Elev. 499 ft)
4:21 am CDT Aug 19, 2026
4am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

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