These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...
A polar vortex is going to bring very cold air to much of southern Ontario, including Waterloo region, Guelph and Wellington ...
As a slug of polar vortex-fueled arctic air overtakes the eastern two-thirds of the U.S. next week, a storm system could ...
Dangerously cold weather will put much of the United States into a deep freeze over the weekend as temperatures are expected to plunge by up to 40 degrees behind an Arctic airmass.