A swirling mass of cold air usually stays parked at the poles, but sometimes that system can weaken, sending an Arctic blast southward into the U.S.
The post Polar Vortex: The Chilly Science of an Arctic Blast appeared first on Scout SEO- Melbourne Internet Marketing.
from Innovation and Digital Marketing http://www.livescience.com/57218-polar-vortex-guide.html?utm_source=rss&utm_medium=rss
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