A strong, stable vortex is like a skater spinning with their arms tucked closely in, holding in an area of cold air over the Arctic. But when there’s a wobble in the rotation, winds in the vortex can ...

Temperatures are achingly cold in the stratosphere over the Arctic, which can only mean one thing: it's perfect conditions ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

A better understanding of the pathways of influence between Arctic surface conditions, the stratospheric polar vortex and mid-latitude winter weather would improve our ability to anticipate these ...

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

The polar vortex is a gigantic circular upper-air weather pattern in the Arctic that envelops the North Pole. It's a normal pattern that is stronger in the winter and tends to keep the coldest ...

However, when the stratospheric polar vortex weakens ... No conspiracy, no cloud seeding, no planned effort, just good ol’ fashioned winter, like it used to be. So, while the headlines will ...