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Polar vortex keeps much of the US in its icy grip
(AP) — A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped ... in memory of former President Jimmy Carter. In Kentucky’s biggest city ...
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Chain reaction could unleash polar vortex in US
The polar vortex is a part of Earth's atmosphere that is found over the North Pole. Strong winds typically keep the vortex locked in place, but periodically, changes in the weather can cause the ...