Teleconnections in our atmosphere allow conditions in one part of the world to affect weather patterns thousands of kilometres away ...

Content continues below The Arctic Oscillation (AO) is another teleconnection that can serve as a good proxy for keeping track of the polar vortex. The AO tracks changes in the mid-levels of the ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation ...

The Polar Vortex's collapse will cause a major Arctic blast from central Canada into the Northeast United States, even if a progressive and dynamic weather pattern will persist across North ...

The La Niña weather pattern ended last month as Pacific Ocean temperatures rose and the El Niño Southern Oscillation cycle ...

"The large polar vortex disruption ... coldest weather bottled up in the Arctic. Previously this winter: Icy air has descended on the US. Is the polar vortex to blame? However, a disruption ...

On March 9, the polar vortex wobbled and then snapped back the other way as mighty winds, suddenly shifting from the west to the east - something that typically happens once a year - usually in the ...

It's a normal pattern that's stronger in the winter and usually tends to keep the coldest weather bottled up in the Arctic. Previously this winter: Icy air has descended on the US. Is the polar vortex ...