A deep freeze set in over the Midwest on Sunday with low temperatures figure in the single digits and a couple underneath zero, transforming the season's first real snow into ice that made several streets tricky to travel.

After snow on Friday and Saturday over the region, temperatures dove behind the front. The National Weather Service forecast 20 degrees or lower across over six states from North Dakota to Illinois. Fargo, North Dakota, could plunge to 11 degrees by early Sunday. Madison, Wisconsin, could see 7 degrees and Des Moines at 12. The weather service stated that portions of Iowa, northwest Illinois and southern Wisconsin could range below zero.

The temperature was expected to achieve 18 degrees early Sunday in Minneapolis, where many individuals clustered around flames to stay warm at an encampment outside a police headquarters to challenge the deadly shooting of a dark man by officers there a week ago.

Chicago could see a low of 9 degrees early Sunday and around 20 degrees at twelve when the Chicago Bears challenge the Denver Broncos in a NFL game at Soldier Field.

The first snowfall of the season brought sums ranging from a couple inches to 20 from South Dakota through Michigan prior in the weekend.

In the southern Wisconsin town of Janesville, somewhere around 10 and 20 inches of snow had fallen by late Saturday evening, the weather service said.

Southside True Value Hardware administrator Matt Krienke expressed that business had been great in the days leading up to the storm, yet that it had turned out to be exceptionally smooth. He added that people who don't need to drive don't need to be out.

Chicago's O'Hare International Airport had recorded 7 inches of snow by late morning Saturday, which constrained the cancelation of several flights. On the other hand, operations were expected to return to normal on Sunday with just a couple cancelations.