Polar vortex could bring harsh winter to U.S. east coast

The video explains the polar vortex, a counterclockwise flow of air that keeps cold air near the poles. During winter, the vortex can become unstable, causing cold Arctic air to move southward, leading to severe weather. This instability is linked to sudden stratospheric warming, where winds change and the vortex may split. Predictions suggest Eurasia will be affected first, with the lower 48 states experiencing effects weeks later.

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