National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

A Few Clouds

75°F

24°C

Humidity 94%
Wind Speed Calm
Barometer 29.86 in (1010.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 12 Aug 10:53 pm CDT
Extended Forecast for

National Stock Yards IL

Extreme Heat Warning August 12, 11:28pm until August 15, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 12, 11:28pm until August 15, 09:00pm

    NOW until 9:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 74 °F

    Scattered
    T-storms

  • Thursday

    Thursday: Scattered showers and thunderstorms before 10am, then isolated showers and thunderstorms after 3pm. Partly sunny and hot, with a high near 99. Heat index values as high as 111. Light and variable wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 30%.

    High: 99 °F

    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Isolated showers and thunderstorms before 9pm. Partly cloudy, with a low around 79. South wind around 7 mph. Chance of precipitation is 20%.

    Low: 79 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 100. Heat index values as high as 111. South wind 3 to 6 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 79. South wind around 6 mph.

    Low: 79 °F

    Mostly Clear

  • Saturday

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

    High: 101 °F

    Hot

  • Saturday Night

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

    Low: 79 °F

    Mostly Clear

  • Sunday

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

    High: 101 °F

    Hot

Detailed Forecast

Tonight
Scattered showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 74. South wind around 6 mph. Chance of precipitation is 30%.
Thursday
Scattered showers and thunderstorms before 10am, then isolated showers and thunderstorms after 3pm. Partly sunny and hot, with a high near 99. Heat index values as high as 111. Light and variable wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 30%.
Thursday Night
Isolated showers and thunderstorms before 9pm. Partly cloudy, with a low around 79. South wind around 7 mph. Chance of precipitation is 20%.
Friday
Mostly sunny and hot, with a high near 100. Heat index values as high as 111. South wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 79. South wind around 6 mph.
Saturday
Sunny and hot, with a high near 101.
Saturday Night
Mostly clear, with a low around 79.
Sunday
Sunny and hot, with a high near 101.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 71.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 91.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 73.
Wednesday
Mostly sunny, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
National Stock Yards IL
 38.62°N 90.15°W (Elev. 407 ft)
Last Update:
9:46 pm CDT Aug 12, 2026
Forecast Valid:
11pm CDT Aug 12, 2026-6pm CDT Aug 19, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation