Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

63°F

17°C

Humidity 97%
Wind Speed S 3 mph
Barometer 29.73 in (1006.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 17 Jun 3:52 am CDT
Extended Forecast for

Gorham IL

Wind Advisory June 17, 01:00pm until June 17, 08:00pm
Flood Warning June 17, 04:55am until June 21, 06:08am
Click here for hazard details and duration
Wind Advisory
Flood Warning
  •  
    Flood Warning June 17, 04:55am until June 21, 06:08am

    NOW until 6:08am Sun

    Flood Warning

  • Today

    High: 89 °F

    Sunny then
    Sunny and
    Breezy

  • Tonight

    Tonight: Showers and thunderstorms likely before 5am, then a chance of showers.  Increasing clouds, with a low around 72. Breezy, with a west southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 37 mph.  Chance of precipitation is 70%.

    Low: 72 °F

    Chance
    T-storms and
    Breezy then
    Showers
    Likely

  • Thursday

    Thursday: A 40 percent chance of showers, mainly between 9am and 10am.  Increasing clouds, with a high near 85. West southwest wind around 7 mph becoming north northwest in the afternoon.

    High: 85 °F

    Chance
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 1am.  Mostly cloudy, with a low around 63. North northwest wind 5 to 7 mph becoming calm  after midnight.

    Low: 63 °F

    Chance
    Showers

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 63. North wind around 5 mph becoming calm  in the evening.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 68. South southeast wind 3 to 6 mph.

    Low: 68 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 89. Breezy, with a south southwest wind 7 to 12 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.
Tonight
Showers and thunderstorms likely before 5am, then a chance of showers. Increasing clouds, with a low around 72. Breezy, with a west southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 70%.
Thursday
A 40 percent chance of showers, mainly between 9am and 10am. Increasing clouds, with a high near 85. West southwest wind around 7 mph becoming north northwest in the afternoon.
Thursday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 63. North northwest wind 5 to 7 mph becoming calm after midnight.
Juneteenth
Mostly sunny, with a high near 84. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 63. North wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. South southeast wind 3 to 6 mph.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. South southwest wind 7 to 16 mph, with gusts as high as 25 mph.
Sunday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 69. West southwest wind 10 to 16 mph, with gusts as high as 22 mph.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. West southwest wind 9 to 11 mph becoming north in the afternoon. Winds could gust as high as 18 mph.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. North wind 5 to 10 mph becoming light north northeast in the evening.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. North northeast wind 3 to 5 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Gorham IL
 37.71°N 89.48°W
1:46 am CDT Jun 17, 2026
4am CDT Jun 17, 2026-6pm CDT Jun 23, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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