The polar vortex is weakening, which means New England is in for a colder than usual December, with episodic cold snaps.

Some of the coldest air in years is expected to plunge into the High Plains, Midwest and finally the East in the coming days as arctic air dips down into the Lower 48 for a spell. The mere mention of ...

The polar vortex is a large area of arctic air that sits and spins across the North Pole. A strong jet stream will keep it ...

Some researchers do believe there is a connection between climate change and the impact to the Arctic and polar vortex activity, but for others this is still an active area of investigation. What is ...

Bundle up and prepare: People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several... Bone-chilling temperatures will envelop millions of ...