Grist: Earlier this month, squeals of delight (and/or searing pain) gripped much of the country as we were collectively introduced to the wonders of the polar vortex. But now the noveltys over, and for the second time this month, an extreme weather pattern is sending Arctic weather toward the Deep South.
An uncommonly sharp kink in the jet stream is partly responsible for plunging more than half of the United States into the freeze. Meanwhile, (and for the same reason), Alaska is toasty warm. But well...