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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

A Few Clouds

84°F

29°C

Humidity 59%
Wind Speed SW 20 G 40 mph
Barometer 29.61 in (1002.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 17 Jun 11:52 am CDT
Extended Forecast for

4 Miles NNW Vergennes IL

Wind Advisory June 17, 01:00pm until June 17, 08:00pm
Click here for hazard details and duration
Wind Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 90. Breezy, with a south southwest wind 23 to 29 mph, with gusts as high as 39 mph.

    High: 90 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 3am. Low around 70. Breezy, with a west southwest wind 17 to 22 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 80%.

    Low: 70 °F

    Showers and
    Breezy

  • Thursday

    Thursday: A chance of showers between 9am and 10am. Increasing clouds, with a high near 85. West wind 5 to 7 mph becoming north northwest in the afternoon. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 62. North northwest wind around 6 mph becoming calm in the evening.

    Low: 62 °F

    Slight Chance
    Showers

  • Juneteenth

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

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. Light north wind.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. South wind 3 to 6 mph.

    Low: 67 °F

    Mostly Clear
    then Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 87. South southwest wind 7 to 17 mph, with gusts as high as 25 mph.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 90. Breezy, with a south southwest wind 23 to 29 mph, with gusts as high as 39 mph.
Tonight
Showers and thunderstorms, mainly before 3am. Low around 70. Breezy, with a west southwest wind 17 to 22 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 80%.
Thursday
A chance of showers between 9am and 10am. Increasing clouds, with a high near 85. West wind 5 to 7 mph becoming north northwest in the afternoon. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 62. North northwest wind around 6 mph becoming calm in the evening.
Juneteenth
Mostly sunny, with a high near 84. Calm wind becoming north northwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 62. Light north wind.
Saturday
Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. South wind 3 to 6 mph.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 87. South southwest wind 7 to 17 mph, with gusts as high as 25 mph.
Sunday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 68. West southwest wind 10 to 14 mph, with gusts as high as 20 mph.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. West wind around 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 63. North wind 5 to 10 mph becoming light north northeast after midnight.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83. North northeast wind 3 to 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Vergennes IL
 37.95°N 89.39°W
Last Update:
10:31 am CDT Jun 17, 2026
Forecast Valid:
12pm CDT Jun 17, 2026-6pm CDT Jun 23, 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