A polar vortex is unleashing extreme winter weather across the United States, affecting millions with dangerous cold, heavy snowfall, and treacherous icy conditions. The US National Weather ...

The polar vortex, as explained by the National Weather Service, is a large area of low pressure and cold air that encircles the Earth’s poles. Even though it’s often framed in the media as a weather ...

A National Oceanic and Atmospheric Administration graphic shows cold air surging south into the U.S. from the polar vortex above the north pole.

The vortex has likely "existed in some form for the past 4.5 billion years," according to senior scientist Jeff Kiehl of the National Center for Atmospheric Research in Boulder, Colorado.

Chicagoans are no strangers to cold weather, but some of the terminology used to describe frigid conditions can be confusing. That’s why experts from the National Weather Service’s Chicago ...

After a largely mild end to 2023, cold jet stream air from the polar vortex appears set to descend on parts of the U.S. later this week, ... the National Weather Service said.

Sometime next week, 89% of the contiguous United States will be below the freezing mark and 27% of the Lower 48 will be below zero (minus 18 degrees Celsius), according to National Weather Service ...

The term "polar vortex" has been a "rising star" in recent years, according to the National Oceanic and Atmospheric Administration's polar vortex blog.. It's such a star, in fact, that a viral ...

Atmospheric scientists were surprised earlier this month to notice that the Arctic's polar vortex reversed its trajectory as it began spinning in the opposite direction. What's more: It has yet to ...

The polar vortex is experiencing an unusually long disturbance this year because of a “sudden stratospheric warming.” Bundle up. By John Schwartz Rough winter weather is working its way across ...