THE polar vortex has taken shape over the North Pole and is starting to get stronger, but what exactly does that mean for the winter season? With a record-breaking El Niño threatening to bring ...
The Detroit News on MSN
The polar vortex is returning. What's its role for winter?
A stronger polar vortex is developing over the Arctic. Here's what it could mean for winter, including the role of a powerful El Niño.
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