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

A polar vortex that hit much of the U.S. with ice and snow has dealt a glancing blow to Florida and its manatee population.

A winter storm that dropped heavy snow and glazed roads throughout the U.S. South was maintaining its icy grip on much of the ...

Another blast of winter storms is closing schools, snarling flights and putting millions of residents on alert across parts ...

After a freezing winter storm shut schools, cut power and canceled or delayed flights, the South was slowly thawing Sunday.

Snow, freezing rain and rain are underway in the southern Plains as a potent winter storm strengthens Thursday.

A winter storm in Texas is causing widespread flight cancellations, particularly in Dallas, a major airline hub.

After a brief pause in the arctic air during the end of the workweek, a series of frontal boundaries will help usher in the coldest air of the season, beginning over the weekend and continuing ...

Fire-struck America faces fresh misery from a ‘Siberian Express’ winter storm threatening a near nationwide whiteout. As ...

Thousands of flights have been canceled, including more than 400 out of Atlanta’s Hartsfield-Jackson airport – the nation’s ...

A potent cold front will enter the north-central U.S. before roaring across much of the rest of the nation over the weekend.

The major winter storm that pummeled the Midwest and Mid-Atlantic region left behind bitter cold conditions and widespread ...