Snow season has gotten off to a fast start across swaths of the northern United States this year. Fueled in part by an ...

Forecasters have said parts of the U.S. can expect frigid temperatures in December. A first round has arrived, and more cold ...

As travellers head to the airport over the holidays, Aéroports de Montréal is urging people to plan ahead, largely due to the ...

Winter arrived early this year with temperatures below seasonal averages, much to the delight of ski resorts, which were able ...

From Northern Lights over Lake Michigan and summer heat waves to snowy L platforms and Chicago's response to federal immigration agents, our photojournalists documented every moment.

A strong polar vortex doesn't cause cold weather — it does the opposite. Here's what to know about polar vortices, how they ...

A disruptive polar vortex is set to usher in three successive waves of Arctic air across the central and eastern United States through mid-December, bringing dangerously low temperatures and the ...

Ready for some serious cold? The planet's most extreme cold air will be barreling into the central and eastern United States this coming weekend "like a wrecking ball," said Weather Trader ...

CLEVELAND — The temperature outside was so cold that your fingers, toes, nose and cheeks felt like they were burning. A harsh Arctic cold wave brought record-breaking temperatures to the United States ...

Grab your coats, it's getting chilly. A polar vortex broke, and severe temperatures are set to dominate most of the United States, including the Midwest, in the coming days. The polar vortex will ...