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

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 ...

Snow, high winds and below-average temperatures are sweeping from the Rockies to the Midwest, while an atmospheric river threatens flooding in the Pacific Northwest.

Although the storm will move out of the region quickly, its impacts could cause widespread disruptions to daily life.

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

Travel disruptions continued across the country on Sunday, with over 1,600 flight delays and nearly 500 cancellations.

A blast of Arctic air gripped much of the central and eastern portions of the U.S. on Friday in sub-freezing temperatures ...

Vacancies remain in National Weather Service offices across the country, including in some of the coldest, snowiest parts of ...

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