What's going on with the polar vortex?
Observations show the ring of fierce winds that rotate at the Earth's North Pole has changed direction. Scientists say it's a historic disruption and the earliest reversal on record. What could it mean for the weather?
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What's going on with the polar vortex?
Observations show the ring of fierce winds that rotate at the Earth's North Pole has changed direction. Scientists say it's a historic disruption and the earliest reversal on record. What could it mean for the weather?


