We have missed out on the majority of the heavy rain that has plagued areas to our south over the past several days. That is because the stalled out frontal boundary and areas of low pressure riding along that boundary have largely remained just far enough south to keep nearly all of the moisture away from far northern Illinois and southern Wisconsin. Other than a few isolated showers or thunderstorms Tuesday into Wednesday, we should continue to stay mainly dry through the end of the week.
By Friday, a cold front will push closer to the region from the northwest. This front will bring two big time changes to the Stateline: an almost guaranteed chance of rain and storms and fall-like temperatures. As a result of the strength of the front, the storms that move through late Friday night and Saturday have the potential to be strong, but a large severe weather event does not look very likely at this time. The greatest threat for severe weather will remain just to our west from Kansas to Missouri to Iowa and Wisconsin. Regardless, a decent amount of rain is possible with totals possibly exceeding 1" by Saturday evening.
Behind the front will exist much cooler air. It will feel more like late September or early October than late August. High temperatures will hold in the middle 70's Sunday and Monday with overnight lows int he middle 50's!