The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously ...

A polar vortex over southern Ontario means Waterloo region, Guelph and Wellington County will experience very cold ...

Understanding the Polar Vortex The polar vortex is like a massive whirlpool of frigid air moving around our planet's poles.

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...

A polar vortex will plunge Waterloo region, Guelph and Wellington County into a deep freeze until Wednesday, Environment ...