CHICAGO (WLS) -- "Polar Vortex" is a dreaded term that we all have become accustomed too over the past few years. But what is it? The polar vortex is always present in the Arctic Circle. It is ...

As temperatures across the Midwest tumbled below zero overnight Tuesday into Wednesday, many reported being awakened by the sound of loud booms, cracks and pops. Some even reported feeling tremors.

The polar vortex is beginning its seasonal strengthening, signaling a gradual shift toward cooler weather. Frost advisories were issued in parts of the Great Lakes region, New York, and New ...

The polar vortex is stirring up, bringing the earliest hints that the weather is changing as autumn has officially arrived. In the short term, this means gradual cool-downs and a more active storm ...

As temperatures plunge around the country, flights are getting canceled due to the extreme weather conditions. Even when it is safe to fly, the process of getting the planes off the ground might ...