A polar vortex is a large, low-pressure system of cold air that typically resides near the Earth’s poles, surrounded by ...

Explore the science of polar vortexes, how trees survive freezing temperatures, and snowflake formation as the Adirondacks brace for Thanksgiving snow.

A polar vortex is on its way for much of Canada next week. And while it’s not the first time Canadians have faced down the chill of a polar vortex in recent years, this one is set to cause ...

Scientists are still trying to understand the atmospheric disturbances. A significant change in the atmosphere means the weeks after Thanksgiving could be colder and snowier than normal across ...

An Arctic blast is expected to bring cold temperatures and potential heavy snow to Michigan and other northern states around Thanksgiving and into early December. A rare weather phenomenon, known as a ...

An extreme warming event high in the atmosphere is threatening to disrupt the polar vortex. We break down what that could mean for Canadians A rare, early, stratospheric warming event could shake up ...

High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

Something unusual may be brewing in the stratosphere, and meteorologists say it could change the course of the winter forecast. The atmosphere is at a "critical juncture," and what happens in November ...

A potential wobble in the polar vortex could bring a return of arctic air to Ohio and the northern U.S. around Thanksgiving. Forecasts show below-average temperatures for about half the country ...