CHICAGO (WLS) -- The Chicago area is bracing for its heaviest snowfall in well over a year as a winter storm arrives Monday night. Snow began moving in from the southwest Monday afternoon and will pick up in intensity throughout the overnight hours, ABC7 meteorologist Larry Mowry said. The heaviest snow will likely be between 7 p.m. and midnight, where snowfall rates could approach an inch per hour. Most areas can expect between 2 and 5 inches of snow by 7 a.m. Tuesday. An additional 2 to 4 inches of snow is likely from 7 a.m. to 3 p.m. Tuesday. Lingering lake effect snow showers could persist after 3 p.m.