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    Ian Oliver and Bayne Froney explain how a weakening polar vortex impacts US weather

    Fox Weather Now · FWX · Aired Yesterday · 3m 3s

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    Ian Oliver and Bayne Froney discuss the early-season weakening of the polar vortex and its potential impacts on U.S. weather. They explain how a disrupted polar vortex can cause the jet stream to become wavy, potentially spilling cold Arctic air southward, while assessing how the current El Niño influences this season's outlook.