Not sure if there is any sort of pattern to this or not, but while looking at College of DuPage again I noticed a pattern here. The storms seem to be aligned with the 1016 millibar barometric pressure line. I have circled the areas in the below image that line up with 1016 millibars. It may not be anything, but it is in fact an interesting discovery to watch over a period of time. Will have to keep an eye on this to see if it continues over a period of time. Since storms are related to low pressure this would make sense.
