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

When that happens, the polar vortex weakens or breaks apart, allowing cold Arctic air to spill into lower latitudes. That’s ...

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 ...

Several days with temperatures of 10-20 degrees below the historical average could be dangerous to plants and ruin outdoor ...

over the Arctic. When these winds weaken, as has been happening recently, filaments of the vortex can break off, and meander south into the U.S., Europe and parts of Asia. Last month, parts of the ...

Why has April in Chicago been cold so far? A big factor is the disruptions in the polar vortex, even as the “polar vortex ...

Devastating winter storms that led to deaths and power outages across the UK and Ireland were driven by an intense swirling vortex of winds miles above the Arctic, scientists have revealed. In ...

A significant disruption to the polar vortex over far Northern Canada will keep the pattern’s influence locked in our neck of ...

"The large polar vortex disruption from the second week of March is playing ... "we are going to get a much deserved break" from severe weather as a powerful cold front moves off the East Coast late ...

"The large polar vortex disruption from the second week of ... "we are going to get a much deserved break" from severe weather as a powerful cold front moves off the East Coast late Sunday and ...