Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

Salem, Salem-Leckrone Airport (KSLO)

Lat: 38.64°NLon: 88.96°WElev: 574ft.

Fair

76°F

24°C

Humidity 86%
Wind Speed NA
Barometer 29.94 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 5 Sep 1:55 am CDT
Extended Forecast for

4 Miles N Vandalia IL

Extreme Heat Warning September 5, 02:09am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 5, 02:09am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Overnight

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Isolated showers between 3pm and 4pm, then isolated showers and thunderstorms after 4pm.  Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming northwest around 6 mph in the afternoon.  Chance of precipitation is 20%.

    High: 99 °F

    Sunny then
    Isolated
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. Northeast wind 3 to 5 mph.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. Northeast wind 6 to 10 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. Northeast wind 5 to 9 mph becoming light east  after midnight.

    Low: 61 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 74. Calm wind.
Saturday
Isolated showers between 3pm and 4pm, then isolated showers and thunderstorms after 4pm. Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 68. Northeast wind 3 to 5 mph.
Sunday
Sunny, with a high near 89. Northeast wind 6 to 10 mph.
Sunday Night
Partly cloudy, with a low around 61. Northeast wind 5 to 9 mph becoming light east after midnight.
Labor Day
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 63.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny and hot, with a high near 100.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 68.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 62.
Friday
A 20 percent chance of showers. Sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Vandalia IL
 39.03°N 89.1°W (Elev. 538 ft)
1:26 am CDT Sep 5, 2026
2am CDT Sep 5, 2026-6pm CDT Sep 11, 2026
 
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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