Such events distort the polar vortex, which causes Arctic air to descend into the U.S. and causes temperatures to plummet.

Several inches of snow are expected to fall on Dec. 2 in the Northeast and Mid-Atlantic, with freezing rain and iced-over ...

The blast of frigid temperatures follows days of snowy, icy conditions across much of the country. It's bringing the coldest ...

Here’s a look at the Thanksgiving week weather forecast: A winter storm watch is in place for North Dakota and Minnesota, ...

Some forecasters say a complex dance involving the polar vortex could send some of Earth's most extreme cold toward the ...

The more significant storm will hit on Monday and Tuesday, but impacts from the first storm will arrive on Friday.

Temperatures across New York are set to plunge tonight, with the coldest air in the nation dropping into the Adirondacks — ...

La Niña is present again this winter, which can have significant impacts on winter weather around the United States.

How colder air interacts with a developing storm will determine if and where a band of snow or a mix forms from the ...

Travelers face challenging weather for the rest of the Thanksgiving holiday weekend. Winter storm warnings have been issued ...