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

Heavy Rainfall and Severe Thunderstorms in the Midwest and Ohio Valley Tuesday

Multiple rounds of severe thunderstorms appear likely Tuesday across the Midwest and Ohio Valley, with severe wind gusts in excess of 75 mph as the primary threat. Heavy to excessive rainfall may lead to considerable flash and urban flooding impacts Tuesday across portions of the Ohio Valley. A Moderate Risk (level 3 of 4) of excessive rainfall has been issued. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

82°F

28°C

Humidity 79%
Wind Speed Vrbl 3 mph
Barometer 29.98 in (1014.1 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 10 Aug 10:54 pm CDT
Extended Forecast for

Saint Peters MO

Extreme Heat Warning August 10, 11:44pm until August 12, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 10, 11:44pm until August 12, 08:00pm

    NOW until 8:00pm Wed

    Extreme Heat Warning

  • Tonight

    Low: 79 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 97. Heat index values as high as 109. Southwest wind around 9 mph.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 77. Southwest wind around 6 mph.

    Low: 77 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 96. Heat index values as high as 109. Southwest wind 5 to 7 mph.

    High: 96 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. South wind 3 to 5 mph.

    Low: 77 °F

    Partly Cloudy
    then Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 94.

    High: 94 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    T-storms

  • Friday

    Friday: Partly sunny, with a high near 92.

    High: 92 °F

    Partly Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 79. South wind around 7 mph.
Tuesday
Mostly sunny and hot, with a high near 97. Heat index values as high as 109. Southwest wind around 9 mph.
Tuesday Night
Partly cloudy, with a low around 77. Southwest wind around 6 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 96. Heat index values as high as 109. Southwest wind 5 to 7 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. South wind 3 to 5 mph.
Thursday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 94.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 75.
Friday
Partly sunny, with a high near 92.
Friday Night
Partly cloudy, with a low around 75.
Saturday
Sunny and hot, with a high near 97.
Saturday Night
Mostly clear, with a low around 77.
Sunday
Sunny, with a high near 96.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Peters MO
 38.78°N 90.59°W (Elev. 492 ft)
Last Update:
10:16 pm CDT Aug 10, 2026
Forecast Valid:
11pm CDT Aug 10, 2026-6pm CDT Aug 17, 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