Polar Vortex Explained: Wondering why it's so cold and stormy this week? The polar vortex is back, plunging much of the country into a deep freeze. Join The Weather Network's Saphia Khambalia and meteorologist Dylan Kikuta as they break down the science behind this frigid phenomenon. | The Weather Network

People all over the country woke up to frigid temperatures today. Here's what you need to know about the polar vortex: http://cbsn.ws/2gJJPZ7 | CBS News

The Southern Hemisphere polar vortex took a unique journey this winter ♻️ A mid-July, minor Sudden Stratospheric Warming event saw the vortex become elongated, weaker, wobbly. This stratospheric anomaly affected tropospheric weather patterns, but now appears to be easing. In late July and early August, a rapid stratosphere-troposphere coupling contributed to the development of a major high pressure cell and heatwave over Antarctica, while a very deep low formed over the Southern Ocean, and a hea