Residents in eastern Illinois and northern Indiana should prepare for potential severe weather, including isolated tornadoes, damaging winds, and hail. Areas east of Interstate 57 are at the highest risk, but storms could impact the broader Chicago area. Wind gusts over 60 mph and supercell storms could cause localized damage. While the risk is categorized as 'slight' to 'marginal,' the possibility of tornadoes and severe thunderstorms warrants caution. Travel disruptions and power outages may occur in affected areas.