ALT This is a multiday forecast graphic for northern Illinois and northwest Indiana. Headline: Five Day Outlook. Sub Headline: Severe Thunderstorms Possible Wednesday. Showers will end from west to east across the area during the mid to late morning. An isolated thunderstorm is possible south of Interstate 80. No severe weather is expected. High temperatures will be much cooler today, mainly in the lower 70s with northwest winds gusting as high as 30 mph. There will be another chance for thunderstorms Tuesday afternoon, a few of these thunderstorms may be strong to severe. Severe thunderstorms are expected across the entire area Wednesday with all severe hazards possible. Torrential rain and localized flooding will also be possible Wednesday. Visit weather.gov/Chicago for more forecast details for your location. Graphic Created: Sunday, June 14, 2026 5:06 AM CDT