Baby, it's colder than normal outside! December is off to a chillier-than-typical start for much of the country. More frosty temperatures hit parts of the north-central U.S. on Thursday, Dec. 4, and ...
The wall that keeps cold air contained in the Arctic is called the polar vortex. There's been a "displacement" in the polar vortex, which allows Arctic air to escape to the south. An "arctic frontal ...
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