Chicago's airports canceled almost 1,000 flights Monday morning with delays of almost an hour at O'Hare airport. Average delays at both airports were lasting less than 15 minutes.
But it's the plunging temperatures expected later this week that have forecasters especially concerned.
But Monday's snow is just a precursor to what's in store for IL starting Tuesday: forecast all-time record cold temperatures and wind chills the weather service calls "possibly life threatening". The homeless should be encouraged to stay in shelters.
North Dakota and northern IL will be hit with the harshest temperatures tomorrow.
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A winter storm system bringing blizzard-like conditions across the Upper Midwest on Monday will dump wintry weather across parts of the Deep South and Northeast by midweek, creating treacherous travel conditions.
Parts of the United States are bracing themselves for life-threateningly cold temperatures, with forecasters predicting wind chills of -50C in places.
But Monday's snow is just a precursor to what's in store for IL starting Tuesday. The National Weather Service says that the Mid-Michigan area could see risky wind chills next week.
"Chicago will likely see its coldest readings in almost 25 years, with lows approaching the all-time record of 27 below and a daytime high on Wednesday of around 15 below", Hennen said.
Wind chills could dip to 55 below.
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Delta Air Lines Inc said it would waive flight change fees for passengers affected by the winter weather in Chicago, Detroit and areas of the Upper Midwest.
Even snowplow drivers are having trouble keeping up with conditions Monday.
Regardless of where you live, much of the country is expecting to feel what could be record-setting lows this week. In more persistent bands in western and northern NY state, several feet of snow could pile up in some communities. In eastern North Dakota, officials have issued travel alerts because of blowing snow.
Wisconsin Gov. Tony Evers declared a state of emergency and activated the National Guard. The stadium said tours, the Lambeau Field Atrium and all its businesses, including the Packers Hall of Fame, were closed to visitors Monday.
Icicles are seen near a beach on Lake Michigan in Chicago, Illinois, January 6, 2015.
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Meteorologist Tyler Hasenstein of the National Weather Service says parts of far southeastern Minnesota into western Wisconsin could see up to 14 inches (35.5 centimeters) of snow.