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.

Fair

84°F

29°C

Humidity 80%
Wind Speed S 3 mph
Barometer 29.91 in (1012.2 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 13 Aug 10:53 pm CDT
Extended Forecast for

2 Miles NNE Oakville MO

Extreme Heat Warning August 13, 11:32pm until August 15, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 13, 11:32pm until August 15, 09:00pm

    NOW until 9:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 97. Heat index values as high as 111. Light south wind.

    High: 97 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Light and variable wind becoming southeast around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 97. Heat index values as high as 109. Light and variable wind becoming west around 6 mph in the morning.

    High: 97 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Calm wind becoming southwest around 5 mph after midnight.

    Low: 76 °F

    Mostly Clear

  • Sunday

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

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 76. South wind around 6 mph.
Friday
Mostly sunny and hot, with a high near 97. Heat index values as high as 111. Light south wind.
Friday Night
Mostly clear, with a low around 77. Light and variable wind becoming southeast around 5 mph.
Saturday
Mostly sunny and hot, with a high near 97. Heat index values as high as 109. Light and variable wind becoming west around 6 mph in the morning.
Saturday Night
Mostly clear, with a low around 76. Calm wind becoming southwest around 5 mph after midnight.
Sunday
Sunny and hot, with a high near 98.
Sunday Night
A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
Sunny, with a high near 89.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Mostly sunny, with a high near 94.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Thursday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Oakville MO
 38.47°N 90.3°W (Elev. 541 ft)
Last Update:
10:21 pm CDT Aug 13, 2026
Forecast Valid:
11pm CDT Aug 13, 2026-6pm CDT Aug 20, 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