The cause of the week-long deep freeze? A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge the U.S., Canada, and parts of ...

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

Researchers from the University of Leeds have found there was an extremely strong stratospheric polar vortex (SPV) – a large spinning mass of cold air in the stratosphere around 15 miles above ...

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.

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 ...

Don't put away those winter coats just yet. An April cold snap is forecast for much of the eastern half of the U.S. early next week, forecasters said, with freezes likely across portions of the ...

The polar vortex slid toward Europe in recent weeks, ushering in cooler temperatures to portions of Canada A significant disruption to the polar vortex over far Northern Canada will keep the ...

"The large polar vortex disruption from the second week of March is playing a key role in next week’s eastern US cold snap," meteorologist Judah Cohen of Atmospheric and Environmental Research told ...

When the polar vortex begins to wobble and allows arctic air to spill south into northern Illinois in January, we usually end up with dangerously-cold air around Chicago. When it happens in April ...

Scientists say a "swirling polar vortex" miles above the Earth caused three deadly storms in the UK and Ireland, which brought severe flooding and record wind speeds. Four people lost their lives ...