To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...

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.

In 2014, the term “polar vortex” burst on the scene across Canada and the U.S. as temperatures plunged. In some places, it was colder than it was on Mars. Well, get ready to hear more about it.

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

The commonwealth is bracing for bone-chilling cold as a weakened polar vortex pushes Arctic air south. The frigid air will be barreling into the central and eastern United States this coming weekend ...