Southern Illinois is in the slight risk category for severe weather when the latest storm system bringing in cooler air pushes into the region after four Wednesday morning. There is an elevated risk of severe weather across northeast Missouri into central and northern Illinois, in a line generally just to the south of Springfield, Decatur, and Champaign.
Here is the detailed forecast for the next two days.
Today
Increasing clouds, with a high near 80. South wind 8 to 17 mph, with gusts as high as 26 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4 am. Cloudy, then gradually becoming partly cloudy, with a low around 61. Southwest wind 16 to 18 mph, with gusts as high as 37 mph. The chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm before 1 pm, then showers likely. Temperature falling to around 51 by 5 pm. Breezy, with a southwest wind 17 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. The chance of precipitation is 100%.
Wednesday Night
A 30 percent chance of showers before 7 pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 34. Northwest wind 7 to 17 mph, with gusts as high as 26 mph.
