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

Dangerous Heat and Possible Flooding This Week

Hot temperatures and high humidity are forecast to continue across much of east Texas into the mid-Mississippi Valley through this week. Heavy to excessive rainfall occurring at times through Friday could bring areas of flooding across parts of the central Plains into the upper Midwest and Four Corners states. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

94°F

34°C

Humidity 49%
Wind Speed NA
Barometer 30.08 in (1018.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 15 Sep 11:53 am CDT
Extended Forecast for

Lakeshire MO

Heat Advisory September 15, 12:09pm until September 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 15, 12:09pm until September 18, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • This Afternoon

    High: 99 °F

    Hot

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 75 °F

    Scattered
    T-storms

  • Wednesday

    Wednesday: Scattered showers and thunderstorms, mainly before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 94. Heat index values as high as 103. Light and variable wind. Chance of precipitation is 30%.

    High: 94 °F

    Scattered
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. Light south wind.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Southwest wind around 5 mph becoming calm in the afternoon.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 99. Heat index values as high as 106. Southwest wind 6 to 8 mph.
Tonight
Scattered showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 75. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Wednesday
Scattered showers and thunderstorms, mainly before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 94. Heat index values as high as 103. Light and variable wind. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 77. Light south wind.
Thursday
Sunny and hot, with a high near 98. Southwest wind around 5 mph becoming calm in the afternoon.
Thursday Night
Partly cloudy, with a low around 74.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 73.
Saturday
Mostly sunny, with a high near 95.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lakeshire MO
 38.53°N 90.35°W (Elev. 499 ft)
Last Update:
11:56 am CDT Sep 15, 2026
Forecast Valid:
12pm CDT Sep 15, 2026-6pm CDT Sep 21, 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