Chicago is preparing for a significant weather event as two rounds of severe storms are expected to hit the area on Friday night. These storms are forecasted to bring heavy rain, strong winds, and the potential for hail and isolated tornadoes, prompting residents to take precautionary measures. Following the storms, a noticeable temperature drop is anticipated, with overnight lows expected to fall into the 40s °F (approximately 4-9°C). This sudden change in temperature could pose additional challenges, especially for those sensitive to cold or with outdoor plans.