A powerful Polar Vortex in the stratosphere brings frigid temperatures to US
The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the majority of U.S. The vortex is ...
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Historic winter storm hits Gulf Coast as Calif. fire risk continues
A once-in-a-generation snowstorm, tied to the polar vortex event across the Lower 48 states, is plastering the Gulf Coast with record-setting snow and ice on Tuesday. Why it matte ...