The Arctic air mass will be in Colorado Friday afternoon, but the effects of the polarvortex won't be fully felt until after the sun goes down. Snow will come into the state's high country in ...
According to the NWS, the Arctic polar vortex is a powerful band of west-to-east winds that develops in the stratosphere, about 10 to 30 miles above the North Pole, during the winter season. It is ...
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