However, a deep ... North and South Poles. During the winter months and when the jet stream allows, this cold air can drop farther down into lower latitudes like in the United States.

A major storm spread heavy snow, sleet and freezing rain across the southern United States on Wednesday, breaking snow records and treating the region to unaccustomed perils and wintertime joy. From ...

The Arctic air mass that plunged across the Deep South this week left a 1,500-kilometre stretch of U.S. area with temperatures below the freezing mark Tuesday morning. Millions of people have been ...