'Polar Vortex' Brings Coldest Temperatures in Decades Updated, 9:05 a.m. Waking up in Madison, Wis., this morning? Monday's forecast is 21 degrees below zero. In Minneapolis, Indianapolis and Chicago it is minus 15. And in Fargo, N.D., it's 32 degrees below zero. With an arctic air mass bringing "dangerously low temperatures" to the center of the country, the wind chill temperature could make it feel like 50 degrees below zero in parts of the northern Plains and Midwest. The so-called polar vortex, as some meteorologists are describing this weather pattern, will also bring the coldest temperatures in years as far south as Atlanta and Nashville, where the high on Monday is expected to be 10 degrees. As a precaution against the record low temperatures, the governor of Minnesota shut public schools statewide Monday, the first time in 17 years. And, with a weekend storm dumping more snow and ice in Indiana and Illinois, the mayor of Indianapolis banned driving. Chicago also ordered its public schools shut Monday after officials initially said over the weekend they would be open. In a local weather forecast from Wausau, Wis., Channel 7"s meteorologist Mark Holley reports on the dangers posed by sub-freezing temperatures. Already, more than 2,500 flights have been canceled around the country on Monday, according to Flightaware, an online flight tracking service, on top of thousands of flights canceled or delayed in recent days. At O'Hare International Airport in Chicago, 1,200 flights were canceled on Sunday. Meanwhile, on the East Coast, the morning temperature was a balmy 54 degrees in New York on Monday. But, as the arctic air moves east, temperatures are expected to steadily fall throughout the day and hover over around zero on Tuesday. A satellite image from NOAA shows land-surface temperatures this morning. The National Weather Service shared a map that takes a look at the wind chill temperatures this morning. In Illinois, the National Weather Service office in Chicago reported this morning that the low temperature at O'Hare International Airport beat the 14 degrees below zero temperature set in 1884 and 1988. According to the National Weather Service, a look at reported wind chill temperatures in some of the hardest hit states. On the East Coast, officials from the local National Weather Service offices were warning people what to expect on Tuesday.