Dangerous Heat in the Central and Southern U.S.; Thunderstorms and Heavy Rain in the Northern Plains

Dangerous, prolonged heat is expected across portions of the Central and Southeast U.S. through July. Scattered severe thunderstorms are expected over parts of the northern Plains into the upper Mississippi Valley Tuesday, with damaging winds and large hail as the primary threats. Heavy rainfall could lead to areas of flooding across the northern Plains, Upper Midwest, Southeast and Southwest. Read More >

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fog/Mist

75°F

24°C

Humidity 100%
Wind Speed Calm
Barometer 30.00 in (1015.3 mb)
Dewpoint 75°F (24°C)
Visibility 4.00 mi
Last update 22 Jul 2:52 am CDT
Extended Forecast for

Gorham IL

Extreme Heat Warning July 22, 03:18am until July 24, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 22, 03:18am until July 24, 07:00pm

    NOW until 7:00pm Thu

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Patchy Fog

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm.  Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 92. Heat index values as high as 109. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 92 °F

    Patchy Fog
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 77. Southeast wind 3 to 5 mph.

    Low: 77 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 106. Calm wind becoming south around 5 mph in the afternoon.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South southeast wind 3 to 5 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 94. South wind 5 to 7 mph.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. South wind around 6 mph.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 1pm.  Sunny, with a high near 91. South wind around 7 mph.

    High: 91 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Overnight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 75. Calm wind.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 92. Heat index values as high as 109. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 77. Southeast wind 3 to 5 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 106. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 76. South southeast wind 3 to 5 mph.
Thursday
Sunny, with a high near 94. South wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 75. South wind around 6 mph.
Friday
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 91. South wind around 7 mph.
Friday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. South wind around 6 mph.
Saturday
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. South wind around 7 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. South southwest wind around 6 mph.
Sunday
Mostly sunny, with a high near 93. West southwest wind 3 to 5 mph.
Sunday Night
Partly cloudy, with a low around 74. South southwest wind around 5 mph becoming calm after midnight.
Monday
Sunny, with a high near 94. Calm wind becoming south southeast around 5 mph in the afternoon.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Gorham IL
 37.71°N 89.48°W
1:31 am CDT Jul 22, 2025
3am CDT Jul 22, 2025-6pm CDT Jul 28, 2025
 
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Additional Resources

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