A tornado watch was still in effect until 11 p.m. Friday for Cook County and northern Illinois, but the severe weather mainly stayed northwest of the Chicago area thanks to a line of cool, dense air that broke the storms up.

Heavy rain is in the forecast for Chicago on Friday night, but an earlier threat of severe weather has significantly diminished. A tornado watch had been in effect for most of the Chicago area until 11 p.m., but it was canceled around 9:30 p.m.