The southeast Wisconsin, Waukesha and Milwaukee forecast for the rest of your Friday will have a dramatic cool-down along Lake Michigan. Temperatures will fall into the 70's there, while Waukesha and areas inland will top out into the 90's before the front rolls through. The high clouds moving in from the south are the remnants of Tropical Depression Isaac. That's not very common to see here.
Saturday, the remnants of Isaac will be brushing the area. That will bring us a slight chance of a shower. Highs Saturday will top out in the mid-70's for our lakefront communities and Milwaukee temperatures and low-80's for our inland areas and Waukesha temperatures.