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Source:
USA TODAY
Unusual Polar Vortex Activity
Forecasters say the polar vortex is undergoing an unusually early disruption, with winds potentially reversing between November 6 and 10; it could be the earliest major sudden stratospheric warming event since reliable records began in 1958. The disruption may increase the chance of frigid air reaching the United States later, but its effects and timing remain uncertain, and forecasts suggest it could be weak and have little U.S. impact. El Niño is another factor shaping U.S. weather this winter.
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