Severe Weather in the Plains; Heavy Rainfall in the Ohio and Tennessee Valleys; Heat Wave in the Central U.S.

Numerous severe storms with a potential for severe wind gusts, tornadoes (some potentially strong), and very large hail are expected in parts of the central and northern Plains. Heavy rainfall may bring a flooding threat to parts of the northern Plains and from the Ohio Valley to the Southeast. Fire weather concerns persist in the Four Corners Region. Hot and humid expected in the central U.S.. Read More >

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

79°F

26°C

Humidity 89%
Wind Speed S 12 mph
Barometer 30.00 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 9 Jun 8:45 am CDT
Extended Forecast for

Marion IL

Flood Watch June 9, 09:28am until June 9, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 9, 09:28am until June 9, 07:00pm

    NOW until 7:00pm Tue

    Flood Watch

  • Today

    High: 90 °F

    Showers
    Likely

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 7pm.  Mostly cloudy, then gradually becoming clear, with a low around 75. South southwest wind around 7 mph.

    Low: 75 °F

    Slight Chance
    T-storms then
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. South southwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 92. South southwest wind 8 to 16 mph, with gusts as high as 25 mph.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 73. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.  Chance of precipitation is 60%.

    Low: 73 °F

    Showers
    Likely

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 87. Northwest wind 5 to 7 mph.

    High: 87 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 65. Light north wind.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Today
Showers and thunderstorms likely, mainly before 1pm. Partly sunny, with a high near 90. Southwest wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Tonight
A 20 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, then gradually becoming clear, with a low around 75. South southwest wind around 7 mph.
Wednesday
Sunny, with a high near 92. South southwest wind 6 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 76. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 92. South southwest wind 8 to 16 mph, with gusts as high as 25 mph.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South southwest wind 6 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Friday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87. Northwest wind 5 to 7 mph.
Friday Night
Partly cloudy, with a low around 65. Light north wind.
Saturday
Mostly sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Light south wind.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the morning.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. West northwest wind around 6 mph becoming calm in the evening.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. Northwest wind 5 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
5:36 am CDT Jun 9, 2026
9am CDT Jun 9, 2026-6pm CDT Jun 15, 2026
 
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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