The Storm Prediction Center has issued Tornado Watch #57 that is in effect for parts Indiana, Illinois, Kentucky and Missouri. The watch is in effect until 7:00pm ET/6:00pm CT.
This is a PDS Tornado Watch. PDS stands for Particularly Dangerous Situation.
In the discussion of the watch product issued by SPC, they say "...A volatiles environment is developing across the northward expanding warm sector...". They also mention the possibility of strong, long-tracked tornadoes.
I hate to say it but looking over the atmospheric ingredients, southeastern Illinois and western Kentucky are looking explosive for thunderstorm development between 11am-1pm CT.