"Bitter cold could linger through the end of the month," the Weather Prediction Center said in an update on Monday.

Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

A chilling polar vortex is set to bring snow and ice to the South and East this week. We show where.

As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States.

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

An Arctic air mass moving across North America is causing extreme cold in Western Canada, which will continue into the ...

A crippling winter storm that could paralyze parts of the Southern and Central U.S. this weekend, and some of the effects ...

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

Ontario may be one of the coldest places on the planet this Friday as an airmass is expected to be centred over the province, ...

Watch as a massive bowl of Arctic air is set to bring extreme, potentially record-breaking cold temperatures to parts of the ...

Temperatures could fall below -20 F across certain parts of North Dakota and Minnesota.