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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 Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

78°F

26°C

Humidity 75%
Wind Speed S 5 mph
Barometer 30.01 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 2 Sep 1:55 am CDT
Extended Forecast for

Hillsboro IL

Heat Advisory September 2, 02:33am until September 5, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 02:33am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Overnight

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98. Heat index values as high as 104. South wind 3 to 7 mph.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. Light south wind.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 97. Heat index values as high as 103. Calm wind becoming southwest around 6 mph in the morning.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 95.

    High: 95 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 74. South wind around 5 mph.
Wednesday
Sunny and hot, with a high near 98. Heat index values as high as 104. South wind 3 to 7 mph.
Wednesday Night
Mostly clear, with a low around 76. Light south wind.
Thursday
Sunny and hot, with a high near 97. Heat index values as high as 103. Calm wind becoming southwest around 6 mph in the morning.
Thursday Night
Mostly clear, with a low around 76. Calm wind.
Friday
Sunny and hot, with a high near 97.
Friday Night
Mostly clear, with a low around 74.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Sunny, with a high near 95.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 71.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 91.
Sunday Night
Partly cloudy, with a low around 67.
Labor Day
A 20 percent chance of showers. Sunny, with a high near 90.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hillsboro IL
 39.15°N 89.49°W (Elev. 617 ft)
Last Update:
1:26 am CDT Sep 2, 2026
Forecast Valid:
2am 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