Severe Thunderstorms and Heavy Rain in the Central Plains to Upper Midwest; Extreme Heat in Parts of the South

Thunderstorms with severe wind gusts and hail will be possible today across parts of the central Plains, and from the Missouri Valley into the upper Mississippi Valley. Heavy rain associated with the thunderstorms may also produce flash/urban flooding. Critical fire weather conditions expected in the Great Basin and interior Northwest. Dangerous heat continues across the Southwest and Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

73°F

23°C

Humidity 96%
Wind Speed Calm
Barometer 30.07 in (1017.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 8 Jul 7:52 am CDT
Extended Forecast for

5 Miles NNW Vergennes IL

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after noon.  Patchy fog before 9am.  Otherwise, partly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm.  Patchy fog between 1am and 4am.  Otherwise, partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Slight Chance
    T-storms then
    Patchy Fog

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 4pm.  Increasing clouds, with a high near 93. Calm wind becoming south southwest 5 to 7 mph in the morning.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm.  Mostly cloudy, with a low around 73. South wind around 6 mph.  Chance of precipitation is 70%.

    Low: 73 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 91. West southwest wind 3 to 6 mph.  Chance of precipitation is 70%.

    High: 91 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 7pm, then showers and thunderstorms likely between 7pm and 10pm, then showers likely and possibly a thunderstorm after 10pm.  Mostly cloudy, with a low around 71. West wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 70%.

    Low: 71 °F

    T-storms
    Likely then
    Showers
    Likely

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Partly sunny, with a high near 88. Light southwest wind.  Chance of precipitation is 60%.

    High: 88 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms.  Partly sunny, with a high near 88. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after noon. Patchy fog before 9am. Otherwise, partly sunny, with a high near 88. Calm wind.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Patchy fog between 1am and 4am. Otherwise, partly cloudy, with a low around 70. Calm wind.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Increasing clouds, with a high near 93. Calm wind becoming south southwest 5 to 7 mph in the morning.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 73. South wind around 6 mph. Chance of precipitation is 70%.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 91. West southwest wind 3 to 6 mph. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm before 7pm, then showers and thunderstorms likely between 7pm and 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 71. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Light southwest wind. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Calm wind becoming north northeast around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 69. Northeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 90. Calm wind becoming northeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 70. Light northeast wind.
Tuesday
Sunny, with a high near 92. Light northeast wind.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Vergennes IL
 37.97°N 89.36°W
8:31 am CDT Jul 8, 2026
8am CDT Jul 8, 2026-6pm CDT Jul 14, 2026
 
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Additional Resources

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