Weather service forecasters say actual air temperatures are expected to fall to -15 degrees on Sunday and Monday nights in parts of central IL. A Wind Chill Advisory is also in effect from 10 p.m. this evening through noon Monday for all of the Four State region.
Tonight's low is expected to be around -2 degrees, and wind chills ranging from 10 to 25 degrees below zero will make it unsafe for anyone to spend extended time outdoors on New Year's Eve without proper attire, according to the National Weather Service.
2018 is going to start on the bitterly cold side.
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Skies will be clear for New Year's Eve night. Wind chills could make it feel as cold as minus-7 degrees.
An Arctic air mass is bringing extreme cold to a wide swath of Canada over the next two days, extending from northern B.C. across the continent to eastern Quebec and remaining in place into Tuesday.
"Our advice for these situations is to wear several layers of clothing", he said, "and keep as little exposed skin as possible".