Tim the brown bear rolled around in snow on Saturday as fresh snow blanketed Brookfield Zoo in Chicago.

The snowfall didn't seem to bother a bison in the zoo.

The Midwest and Great Lakes are caught in a major snowstorm, with forecasters saying the northeast U.S. could get its own early winter storm next week.

The storm already dumped more than 8 inches (20 centimeters) of snow on northern Iowa by Saturday morning and at least that much snow was expected in Chicago as well as other parts of Illinois, Wisconsin, Indiana and Michigan.

Airports in Chicago and St. Louis reported delays of about an hour Saturday morning, according to FlightAware.com, as one of the busiest travel days cranked up after Thanksgiving.

Snow-covered roads and slow travel were reported all across Iowa and northern Illinois and Indiana.