I don't know about you, but I haven't been able to watch TV for the past few days without hearing the term "polar vortex." It sounds like something out of a SciFi movie, doesn't it?  So what is a polar vortex?

AccuWeather say a polar vortex is a large pocket of very cold air, typically the coldest air in the Northern hemisphere, which sits over the polar region during the winter season. The frigid air found its way into the United States when the polar vortex was pushed South, reaching southern Canada and the northern Plains, Midwest and northeastern portions of the United States.

Say what? If you're scratching your head saying to yourself "this still doesn't make sense," you need to check out this video. I was confused until I watched this and now I'm not as confused: