A deep freeze, thanks to the polar vortex dipping down from Siberia, will bring frigid temperatures to nearly 300 million ...

Most of the U.S. will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send ...

A series of disturbances in the atmosphere is sending the polar vortex south (again) next week with a burst of even colder ...

The cold will pose a danger to pipes, so be sure to cover exterior pipes, open cabinets with pipes so warm air can circulate, ...

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

A series of cold fronts the last few weeks has kept Florida downright chilly, as another winter storm starts to take aim this ...

Perfect time to hop on a plane and go somewhere south,” FOX Weather Meteorologist Britta Merwin said. “Like, really, really far south.” ...

This blast of cold weather is due to activity of the polar vortex.

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

Some of the coldest air in years is expected to plunge into the High Plains, Midwest and finally the East in the coming days ...

Abundant cloud cover and rain will keep overnight temperatures more mild, with lows in the 50s and 60s throughout Central ...