ABC7 Meteorologist Cheryl Scott sits down with Illinois state climatologist Trent Ford to dive deeper into the meaning of the polar vortex and its impact here in Illinois.

Memorable recent weather events with polar vortex conditions. Jan. 30-31, 2019. ... The lowest temperature ever recorded in Illinois was observed on Jan. 31, 2019, when Mount Carroll ...

The Chicago Skyline in 2014 as steam rises from Lake Michigan due to a “polar vortex” event. Photo By Raymond Boyd/Getty Images The Arctic air in Chicago is dangerously cold, so much so that ...

Commuters wait for a train as snow falls in Chicago. With a polar vortex hitting the Midwest, wind chills could dip to 55 degrees below zero in northern Illinois.

The polar vortex struck again in the winter of 2014-2015. February 2015 tied for the coldest February on record and ranked as the 10th-coldest month, with eight days with temperatures below zero.

A Wind Chill Advisory goes into effect for Northern Illinois and Northwest Indiana from 4 a.m. to 6 p.m. Tuesday. A Wind Chill Warning goes into effect at 6 p.m. Tuesday through 12 p.m. Thursday.

Governors in Illinois, Wisconsin and Michigan have declared weather-related emergencies. In Chicago, temperatures plunged to minus 19 degrees Wednesday, breaking the day's previous record low set ...

Wavy jet stream to blame for polar vortex invasion. (And climate change may be, too). ... Ice floats on Lake Michigan at dawn in Chicago, Illinois, U.S., on Wednesday, Jan. 30, 2019.

The Polar Vortex that has gripped the Midwest for days has moved eastward into New England. The air behind it should warm up quickly; temperatures in Illinois are expected to rise by as much as 80 ...

ST. LOUIS — Arctic air is poised to spill into the bi-state region Saturday with gusty winds and some of the coldest air this winter. The polar vortex has broken apart and part of that cold air ...

Borchardt and Friedlein: “While the term polar vortex gained notoriety after bone-chilly cold outbreaks of January 2014 and late January 2019, most cold outbreaks are associated with polar vortices.