From snow to brutal wind chills, what you need to know about next week's forecast

You've probably heard the term "polar vortex" -- but what does it mean?Certain weather terms will go viral and, in many cases, are misused. The polar vortex had its 15 minutes of fame years back and now it seems like every time there's a big cooldown that word gets thrown around.Before we dive deep into the upcoming polar plunge, let's define polar vortex. Image courtesy: NOAA
According to the National Weather Service (NWS), the polar vortex is a large area of low pressure and cold air surroundi