Chicago is bracing for a weekend of significant weather, with heavy rain and thunderstorms expected to impact the area. The National Weather Service reports that a low-pressure system is moving into the region, potentially bringing severe weather conditions. Rainfall accumulations could reach up to 2 inches in some areas, and thunderstorms are likely, with the possibility of strong winds and hail. The weather event is expected to start late Friday night and continue through Sunday, with the most intense conditions anticipated on Saturday. Residents are advised to prepare for potential flooding, especially in low-lying areas and regions with poor drainage, and to secure outdoor objects that could be blown away by strong winds.