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 Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Partly Cloudy

97°F

36°C

Humidity 42%
Wind Speed Vrbl 7 mph
Barometer 29.98 in (1013.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 4 Sep 1:51 pm CDT
Extended Forecast for

Webster Groves MO

Extreme Heat Warning September 4, 02:21pm until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 02:21pm until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • This Afternoon

    High: 101 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 81. Calm wind.

    Low: 81 °F

    Mostly Clear

  • Saturday

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

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 79. Northwest wind around 5 mph becoming calm.

    Low: 79 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95. Northeast wind 5 to 7 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Monday Night

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

    Low: 70 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 101. Heat index values as high as 106. West wind around 5 mph.
Tonight
Mostly clear, with a low around 81. Calm wind.
Saturday
Sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 79. Northwest wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 95. Northeast wind 5 to 7 mph.
Sunday Night
Mostly clear, with a low around 69.
Labor Day
Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
A 20 percent chance of showers. Mostly clear, with a low around 76.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 94.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Webster Groves MO
 38.6°N 90.35°W (Elev. 482 ft)
1:41 pm CDT Sep 4, 2026
2pm CDT Sep 4, 2026-6pm CDT Sep 10, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database