The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is ...

A winter storm descending on the US is expected to deliver heavy snow and ice to more than 150 million people across roughly ...

Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

As snow deepens and temperatures dive, the storm is straining power grids, halting transport and creating days of disruption ...

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

The worst of the sleet and ice should be over by Tuesday, but you can expect cold temperatures to hang around for the next ...

A powerful winter storm, influenced by a polar vortex, is impacting much of the U.S., bringing heavy snow, ice, and extreme ...

An unusually brutal winter storm is set to pummel more than 160 million Americans from Friday, as a stretched "polar vortex" sends a devastating blast of Arctic air, bringing heavy snows and freezing ...

The United States braces for a catastrophic winter storm as empty supermarkets, cancelled flights and emergency declarations ...

The storm could bring “catastrophic ice accumulation,” the National Weather Service said, potentially causing “long-duration power outages, extensive tree damage, and extremely dangerous or impassable ...

“‘With the extreme cold temperatures, expect prolonged snow and ice impacts which may include hazardous travel conditions, ...