Door County, Wisconsin

What is the Polar Vortex?

Polar vortexes, though, are nothing new. They occur seasonally at the North Pole, and their formation resembles that of hurricanes in more tropical regions: fast-moving winds build up around a calm center. Unlike a hurricane, these are frigid polar winds, circling the Arctic at more than 100 miles per hour.

The spinning winds typically trap this cold air in the Arctic. But the problem comes when the polar vortex weakens or splits apart, essentially flinging these cold wind patterns out of the Arctic and into our backyards. NOAA scientists have suggested that warming temperatures in the Arctic may be responsible for the weakening of the polar vortex. When the vortex weakens, it’s more likely to break apart and become a factor in our winter weather.

Read more: http://www.businessinsider.com/what-is-a-polar-vortex-2014-1#ixzz2sfD0xAyz

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