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

Southern Illinois Airport (KMDH)

Lat: 37.78° N Lon: 89.25° W Elev: 400 ft.

Partly Cloudy

85°F

29°C

Humidity 70%
Wind Speed W 14 mph
Barometer 30.04 in (1016.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 9 Jun 10:52 am CDT
Detailed forecast for

Union County

Today
Partly sunny with a chance of thunderstorms. A chance of showers this morning, then showers likely this afternoon. Highs around 90. Southwest winds 5 to 10 mph. Chance of rain 60 percent.
Tonight
Mostly clear. Lows in the mid 70s. Southwest winds 5 to 10 mph.
Wednesday
Sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph.
Wednesday Night
Mostly clear. Lows in the mid 70s. South winds 10 to 15 mph.
Thursday
Sunny. Highs in the lower 90s. Southwest winds 10 to 15 mph.
Thursday Night
Mostly clear with a chance of showers and thunderstorms in the evening, then mostly cloudy with showers likely after midnight. Lows in the lower 70s. Chance of rain 60 percent.
Friday Through Saturday
Partly cloudy. Highs in the upper 80s. Lows in the mid 60s.
Saturday Night
Partly cloudy. A chance of showers after midnight. Lows in the upper 60s. Chance of rain 40 percent.
Sunday
Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent.
Sunday Night
Mostly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 50 percent.
Monday
Partly sunny. Highs in the lower 80s.



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537 AM CDT Tue Jun 9 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database