What is polar vortex and how much snow is expected in US? A winter storm linked to polar vortex disruption has impacted ...

Around 17 states witnessed snowfall, with more than a foot of accumulation in some areas. The deep freeze strained energy supplies in some states, and the National Weather Service predicted widespread ...

A polar vortex brings bitterly cold Arctic air into southern Ontario. Here’s what it is and what you can expect.

WASHINGTON (AP) — It might seem counterintuitive, but the dreaded polar vortex is bringing its icy grip to the Midwest thanks to a sudden blast of warm air in the Arctic. Get used to it. The polar ...