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.

Fair

86°F

30°C

Humidity 61%
Wind Speed Calm
Barometer 29.95 in (1012.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 4 Sep 11:51 pm CDT
Extended Forecast for

2 Miles SW Brooklyn IL

Extreme Heat Warning September 5, 12:51am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 5, 12:51am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Overnight

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Isolated showers and thunderstorms after 4pm.  Mostly sunny and hot, with a high near 100. Heat index values as high as 109. Calm wind becoming northwest around 6 mph in the afternoon.  Chance of precipitation is 20%.

    High: 100 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72. Northeast wind 3 to 6 mph.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93. Northeast wind 6 to 8 mph.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. East wind 5 to 8 mph.

    Low: 65 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Monday Night

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

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 76. Calm wind.
Saturday
Isolated showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 100. Heat index values as high as 109. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 72. Northeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 93. Northeast wind 6 to 8 mph.
Sunday Night
Mostly clear, with a low around 65. East wind 5 to 8 mph.
Labor Day
Sunny, with a high near 90.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny and hot, with a high near 97.
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 and thunderstorms. Mostly clear, with a low around 76.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Brooklyn IL
 38.62°N 90.2°W (Elev. 446 ft)
12:26 am CDT Sep 5, 2026
12am CDT Sep 5, 2026-6pm CDT Sep 11, 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