Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

A Few Clouds

79°F

26°C

Humidity 89%
Wind Speed S 7 mph
Barometer 30.09 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 27 Jul 7:50 am CDT
Extended Forecast for

2 Miles S Oraville IL

Extreme Heat Watch July 28, 12:00pm until July 30, 08:00pm
Heat Advisory July 27, 08:19am until July 28, 12:00pm
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory
  •  
    Heat Advisory July 27, 08:19am until July 28, 12:00pm

    NOW until 12:00pm Mon

    Heat Advisory

  • Today

    High: 91 °F

    Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 75. South southwest wind 3 to 6 mph.

    Low: 75 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms.  Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 95. Heat index values as high as 107. West wind 3 to 6 mph.

    High: 95 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. Light southwest wind.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. Calm wind.

    High: 96 °F

    Sunny

  • Tuesday Night

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

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm.  Sunny, with a high near 94. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 94 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 73. North northeast wind around 6 mph.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91. South southwest wind 6 to 8 mph.
Tonight
Mostly cloudy, with a low around 75. South southwest wind 3 to 6 mph.
Monday
A 20 percent chance of showers and thunderstorms. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 95. Heat index values as high as 107. West wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 76. Light southwest wind.
Tuesday
Sunny, with a high near 96. Calm wind.
Tuesday Night
Mostly clear, with a low around 76. Calm wind.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. Calm wind becoming east northeast around 5 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73. North northeast wind around 6 mph.
Thursday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85. North northeast wind 6 to 9 mph.
Thursday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Northeast wind 8 to 10 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 82. Northeast wind 8 to 10 mph.
Friday Night
Partly cloudy, with a low around 64. Northeast wind 6 to 10 mph.
Saturday
Mostly sunny, with a high near 82. Northeast wind 6 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Oraville IL
 37.86°N 89.45°W
7:17 am CDT Jul 27, 2025
8am CDT Jul 27, 2025-6pm CDT Aug 2, 2025
 
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Additional Resources

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