Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

88°F

31°C

Humidity 49%
Wind Speed SW 9 mph
Barometer 30.05 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 31 Aug 10:50 am CDT
Extended Forecast for

4 Miles WNW Butler IL

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

    Today: Sunny, with a high near 95. Southwest wind around 9 mph.

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 73. South wind around 6 mph.

    Low: 73 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 103. Southwest wind around 6 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 75. South wind 3 to 5 mph.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98. Southwest wind 3 to 6 mph.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 77.

    Low: 77 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm.  Sunny, with a high near 92.

    High: 92 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 95. Southwest wind around 9 mph.
Tonight
Clear, with a low around 73. South wind around 6 mph.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 103. Southwest wind around 6 mph.
Tuesday Night
Clear, with a low around 75. South wind 3 to 5 mph.
Wednesday
Sunny and hot, with a high near 98. Southwest wind 3 to 6 mph.
Wednesday Night
Clear, with a low around 77.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Mostly clear, with a low around 74.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 71.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Sunny, with a high near 89.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Butler IL
 39.2°N 89.61°W (Elev. 643 ft)
10:26 am CDT Aug 31, 2026
10am CDT Aug 31, 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