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Tropical Storm Edouard Along the Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard off the central Gulf Coast will bring tropical storm conditions and heavy rainfall to portions of Upper Texas and southwestern Louisiana coasts Tuesday into Wednesday. Storm Surge Watches and Tropical Storm Warnings are in effect. Hot and humid conditions will continue to expand from the Central Plains into the Ohio Valley and Mid-Atlantic this week. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Fair

85°F

29°C

Humidity 57%
Wind Speed SW 8 mph
Barometer 30.01 in (1014.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 31 Aug 11:51 pm CDT
Extended Forecast for

Saint John MO

Heat Advisory September 1, 12:24am until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 1, 12:24am until September 4, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Overnight

    Low: 79 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. Heat index values as high as 105. Southwest wind 5 to 7 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 80. South wind 5 to 7 mph.

    Low: 80 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 100. Heat index values as high as 104. Southwest wind 6 to 8 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 80. South wind around 7 mph.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 81.

    Low: 81 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

Detailed Forecast

Overnight
Clear, with a low around 79. Southwest wind around 7 mph.
Tuesday
Sunny and hot, with a high near 100. Heat index values as high as 105. Southwest wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 80. South wind 5 to 7 mph.
Wednesday
Sunny and hot, with a high near 100. Heat index values as high as 104. Southwest wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 80. South wind around 7 mph.
Thursday
Sunny and hot, with a high near 100.
Thursday Night
Mostly clear, with a low around 81.
Friday
Sunny and hot, with a high near 99.
Friday Night
Mostly clear, with a low around 79.
Saturday
Mostly sunny and hot, with a high near 97.
Saturday Night
Partly cloudy, with a low around 75.
Sunday
Mostly sunny, with a high near 93.
Sunday Night
Partly cloudy, with a low around 72.
Labor Day
Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint John MO
 38.71°N 90.34°W (Elev. 597 ft)
Last Update:
10:25 pm CDT Aug 31, 2026
Forecast Valid:
12am CDT Sep 1, 2026-6pm CDT Sep 7, 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