Siberian air is descending on Canada. Here's what to know about the 'polar vortex'
The intense cold snap about to settle over most of Canada and the U.S. has been dubbed a “polar vortex’, but Environment ...
The Washington Post9d
The polar vortex will soon hit the U.S. See how cold it’ll get where you live
A lobe of the polar vortex, a stormy ring that typically keeps the coldest air locked up near the North Pole, will dip southward into the United States this weekend into next week. Polar air ...