The U.S. is about to get a potent polar vortex blast
Published
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The polar vortex, composed of lofty winds that circulate atop the globe each winter, largely stayed put in the Arctic last year. But in 2021 the winds have weakened, allowing frigid air to spill out of the polar regions. A blast of Arctic air is now destined for a large swath of the U.S. beginning by...