Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.

Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later this week. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

82°F

28°C

Humidity 51%
Wind Speed S 9 mph
Barometer 30.00 in (1014.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 30 Aug 10:51 pm CDT
Extended Forecast for

2 Miles NW East Carondelet IL

Heat Advisory August 31, 12:00pm until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Tonight

    Tonight: Mostly clear, with a low around 72. South wind 3 to 6 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Heat index values as high as 104. Southwest wind 6 to 8 mph.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. South wind 5 to 7 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 101. Heat index values as high as 107. South wind 3 to 6 mph.

    High: 101 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 80. South wind 5 to 7 mph.

    Low: 80 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 79.

    Low: 79 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 72. South wind 3 to 6 mph.
Monday
Sunny and hot, with a high near 100. Heat index values as high as 104. Southwest wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 77. South wind 5 to 7 mph.
Tuesday
Sunny and hot, with a high near 101. Heat index values as high as 107. South wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 80. South wind 5 to 7 mph.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
Mostly clear, with a low around 78.
Friday
Sunny and hot, with a high near 99.
Friday Night
Partly cloudy, with a low around 76.
Saturday
A 20 percent chance of showers. Sunny, with a high near 96.
Saturday Night
Mostly clear, with a low around 73.
Sunday
Sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW East Carondelet IL
 38.55°N 90.26°W (Elev. 440 ft)
11:30 pm CDT Aug 30, 2026
11pm CDT Aug 30, 2026-6pm CDT Sep 6, 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