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Tropical Storm Edouard Impacting the Northwestern Gulf Coast; Hazardous Heat expands in the East

Tropical Storm Edouard will impact the northwestern Gulf Coast through Wednesday with gusty winds, storm surge, and heavy rainfall. Flash and river flooding will be possible, especially in southeastern Texas. Hazardous heat will expand across the central and eastern U.S. by mid-week, and daily chances for severe thunderstorms are expected from the eastern Great Lakes to the Mid-Atlantic this week. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

76°F

24°C

Humidity 85%
Wind Speed Calm
Barometer 30.00 in (1015.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 2 Sep 3:53 am CDT
Extended Forecast for

Arnold MO

Heat Advisory September 2, 04:14am until September 5, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 04:14am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Today

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 78. South wind 3 to 5 mph.

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming southwest around 6 mph in the morning.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. South wind around 5 mph becoming calm after midnight.

    Low: 78 °F

    Mostly Clear

  • Friday

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

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny and hot, with a high near 100. Heat index values as high as 106. South wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 78. South wind 3 to 5 mph.
Thursday
Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming southwest around 6 mph in the morning.
Thursday Night
Mostly clear, with a low around 78. South wind around 5 mph becoming calm after midnight.
Friday
Sunny and hot, with a high near 99. Light southwest wind.
Friday Night
Partly cloudy, with a low around 77.
Saturday
Mostly sunny and hot, with a high near 99.
Saturday Night
Partly cloudy, with a low around 73.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95.
Sunday Night
Partly cloudy, with a low around 71.
Labor Day
Mostly sunny, with a high near 94.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 70.
Tuesday
Mostly sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Arnold MO
 38.42°N 90.35°W (Elev. 400 ft)
Last Update:
2:41 am CDT Sep 2, 2026
Forecast Valid:
4am CDT Sep 2, 2026-6pm CDT Sep 8, 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