Polar vortex keeps much of the U.S. in its icy grip
People in the U.S., Europe and Asia experience the polar vortex's intense cold when it escapes the North Pole and plunges southward.
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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 Kentucky’s biggest city, Louisville, Hugh Ross used his shovel Monday ...