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

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

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

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

A wintry mix is set to impact the Triangle and areas to the north on Friday, with snow and ice possible early in the day before transitioning to all rain by the afternoon. The system could end as a ...

A winter storm watch is in place for North Dakota and Minnesota, where 3 to 9 inches of snow may fall from Monday night ...

Low temperatures will bottom out into the single digits in many towns Friday morning as wind chills could drop to near 0°.

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

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

A late-November cold snap sent temperatures in Minneapolis so low that, for a short time, it was actually colder than Mars, ...

It was so shockingly cold that there were short-lived fears of a new ice age. Scientists think human activity contributed to ...