Image Credit: NASA's Scientific Visualization Studio.
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The Winter of 2013 – 2014: A Cold, Snowy and Icy Winter in North America

The well-known Polar Vortex, frigid air originating in the Arctic, was pushed southward in the 2013 – 2014 winter by a high-pressure system in the Pacific, contributing to a cold, snowy and icy winter in North America.

This animation shows the snow cover over North America during the 2013-2014 winter as well as the ice concentration over the Great Lakes. The date and a graph showing the percent of ice cover over the Great Lakes and Lake Superior is shown on this version.
Read more at: NASA's Scientific Visualization Studio.