"As you might have noticed, it was unusually cold last week. The animation above depicts the weather system’s bone-chilling journey across the country as the spinning expanse of Arctic air known as the polar vortex bulged south before righting itself and returning to its northern home. Along the way, it brought subzero temperatures, a Midwestern blizzard and a devastating snowstorm that buried the Buffalo area for days. The animation visualizes data from the National Oceanic and Atmospheric Administration. ...”
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