Why we still have brutal cold snaps even as the planet warms to record levels

And even as the US struggles to cope with intense bursts of heavy snow now, over the long term, the human-caused climate crisis has led to an alarming trend of disappearing snow in the Northern Hemisphere.

The polar vortex is like a spinning top. In its normal state it rotates very fast, keeping blisteringly cold air locked in the Arctic region.

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