Excessive strain will transfer east of the world Saturday morning, permitting southwest winds to develop. The shift in wind circulate is predicted to deliver a modest improve in heat and humidity to the area prematurely of a southbound chilly entrance over the higher Midwest. In the meantime, a disturbance over central Canada is to maneuver southeast, appearing to push the entrance south of the Chicago space by early Sunday. Because the boundary passes late Saturday night time, scattered thunderstorms might develop. The Storm Prediction Middle says there’s a marginal danger of extreme storms within the metro space. Any storms that do happen will probably be temporary and localized, limiting heavy rainfall potential. With this exercise as a result of arrive in a single day, storms are anticipated to be in a weakening mode. Sunday is forecast to deliver one other inflow of cool, dry, secure, storm-free air.