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

65°F

18°C

Humidity 93%
Wind Speed Calm
Barometer 29.77 in (1007.7 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 16 Jun 11:52 pm CDT
Extended Forecast for

3 Miles NE Jacob IL

Flood Warning June 17, 12:25am until June 21, 06:08am
Click here for hazard details and duration
Flood Warning
  •  
    Flood Warning June 17, 12:25am until June 21, 06:08am

    NOW until 6:08am Sun

    Flood Warning

  • Overnight

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 89. Breezy, with a south southwest wind 6 to 16 mph increasing to 18 to 28 mph in the afternoon. Winds could gust as high as 38 mph.

    High: 89 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 4am, then a slight chance of showers after 5am.  Increasing clouds, with a low around 73. Breezy, with a west southwest wind 18 to 23 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 34 mph.  Chance of precipitation is 70%.

    Low: 73 °F

    Chance
    T-storms and
    Breezy then
    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 11am.  Mostly sunny, with a high near 85. Light and variable wind becoming north northwest 5 to 7 mph in the morning.  Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms before 1am.  Mostly cloudy, with a low around 62. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 62 °F

    Chance
    Showers

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 84. Calm wind becoming north around 6 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Friday Night

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

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

Overnight
Partly cloudy, with a low around 62. Calm wind.
Wednesday
Sunny, with a high near 89. Breezy, with a south southwest wind 6 to 16 mph increasing to 18 to 28 mph in the afternoon. Winds could gust as high as 38 mph.
Wednesday Night
Showers and thunderstorms likely before 4am, then a slight chance of showers after 5am. Increasing clouds, with a low around 73. Breezy, with a west southwest wind 18 to 23 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 70%.
Thursday
A chance of showers, with thunderstorms also possible after 11am. Mostly sunny, with a high near 85. Light and variable wind becoming north northwest 5 to 7 mph in the morning. Chance of precipitation is 40%.
Thursday Night
A 40 percent chance of showers and thunderstorms 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 around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 62. Light and variable wind.
Saturday
Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. South wind around 6 mph becoming calm in the evening.
Sunday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 84. South southwest wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. South southwest wind 8 to 14 mph, with gusts as high as 20 mph.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 84. Southwest wind around 9 mph becoming north northwest in the afternoon.
Monday Night
A chance of showers. Partly cloudy, with a low around 66. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. North wind 3 to 5 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Jacob IL
 37.78°N 89.51°W
11:21 pm CDT Jun 16, 2026
12am CDT Jun 17, 2026-6pm CDT Jun 23, 2026
 
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Additional Resources

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Hourly Weather Forecast

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