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- 1Polar vortex returns: what it means for winter▼The polar vortex is returning. What's its role for winter?
Coverage is focusing on the return of the polar vortex, the band of cold air circling the Arctic, and its influence on the coming winter. When the vortex weakens or shifts, frigid air can spill into Europe and North America, driving cold snaps and storms. Meteorologists are weighing how its behavior could shape seasonal forecasts.