Like ocean waves, Rossby waves can "break" on top of the polar vortex, weakening it and — in extreme cases — reversing the direction of its winds. Last year, a sudden stratospheric warming event hit ...

When that happens, the polar vortex weakens or breaks apart, allowing cold Arctic air to spill into lower latitudes. That’s exactly what happened in early March 2025. A sharp burst of stratospheric ...

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

The Polar Vortex in the upper atmosphere has disintegrated after the intense warming of the stratosphere in mid-March. Currently, its remains are traveling eastward across Canada to the United States.

When the polar vortex begins to wobble and allows arctic air to spill south into northern Illinois in January, we usually end ...

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 ...

"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 ...

When the polar vortex weakens, the jet stream can break off its usual path and cause colder air to push south, according to NOAA. During the polar vortex, temperatures could reach 12-25°F below ...

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 ... "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 ...

"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 ...