A deep freeze set in across the Midwest on Sunday with low temperatures forecast in the single digits and a few below zero, turning the season's first major snow into ice that made some roads treacherous to travel.<br />After snow on Friday and Saturday across much of the region, temperatures plunged behind the front.<br />The National Weather Service forecast 20 degrees or lower across six states from North Dakota to Illinois.<br />Fargo, North Dakota, could dip to 11 degrees by early Sunday.<br />Madison, Wisconsin, could see 7 degrees and Des Moines 12.<br />Parts of Iowa, northwest Illinois and southern Wisconsin could reach below zero, the weather service said.<br />The first snowfall of the season brought amounts ranging from a few inches to 20 from South Dakota through Michigan earlier in the weekend.
