Chicago Weather 11 hours ago Friday morning weather Pete Sack has the latest forecast. Local 1:21 Northern lights put on rare dazzling show over Chicago 1:31 Chicago Marathon street closures 2024: How to get around during the race 3:18 Italian runners in town for Chicago Marathon crash NBC 5 morning show 2:01 CHICAGO FORECAST: Northern Lights possibly visible ahead of warm Friday 2:55 Growing Latino population could play significant role in general election