Arctic blast, polar vortex

The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the majority of U.S. The vortex is ...
A rare winter storm is getting set to slam the Gulf Coast and South, with cities from Texas to Florida under Winter Storm Warnings.
The unseasonable chill that has swept through the eastern half of the US defies last year's mild winters and the South's ...
A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...
A polar vortex that has hit much of the U.S. with ice and snow has dealt a glancing blow to Florida, dropping coastal ...
A lobe of the polar vortex will arrive in the United States this weekend, bringing the lowest temperatures in years and snow and ice to the East and Deep South.
Extreme cold weather forces hospitals to reduce services, including elective surgeries, as polar vortex hits U.S. and disrupts healthcare operations.