The “pneumonia front” is now making its way through Chicago with temps falling from near 80 into the 50’s in an hour or so. Milwaukee recorded a 20 degree temp drop in a matter of minutes–and we’re next, but as I mentioned last night, it won’t be QUITE as dramatic locally. Still, you can expect a wind shift to the north over the next few hours and temps that fall back into the 50s before settling in the upper 40s overnight.