Severe Thunderstorms in the Ohio Valley and Mid-Atlantic; Heat Continuing in the Central U.S.

Widespread strong to severe thunderstorms are expected from the Upper Ohio Valley into the Mid-Atlantic through Friday, with damaging winds as the primary threat. Dangerous heat will continue from the South-Central U.S. to the Midwest, Ohio/Tennessee valleys, and Mid-Atlantic. Widespread Major to Extreme Heat Risk is forecast into the weekend and will confine to the South-Central U.S. by Labor Day Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Fair

87°F

31°C

Humidity 57%
Wind Speed S 8 mph
Barometer 29.94 in (1012.3 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 4 Sep 12:51 am CDT
Extended Forecast for

2 Miles E Saint Louis MO

Extreme Heat Warning September 4, 01:01am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 01:01am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Overnight

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming west around 5 mph in the morning.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. Light south wind.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 100. Heat index values as high as 107. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. North wind around 5 mph becoming calm  in the evening.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Sunday Night

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

    Low: 70 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 78. South wind 3 to 5 mph.
Friday
Sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming west around 5 mph in the morning.
Friday Night
Mostly clear, with a low around 78. Light south wind.
Saturday
Mostly sunny and hot, with a high near 100. Heat index values as high as 107. Calm wind becoming northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 75. North wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 95.
Sunday Night
Mostly clear, with a low around 70.
Labor Day
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny and hot, with a high near 100.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E Saint Louis MO
 38.64°N 90.2°W (Elev. 499 ft)
11:15 pm CDT Sep 3, 2026
1am CDT Sep 4, 2026-6pm CDT Sep 10, 2026
 
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Additional Resources

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