The polar vortex has returned to the U.S., and frostbite-inducing temperatures are blasting millions of Americans.

You might have heard the term “polar vortex” thrown around during the winter months, but what does it really mean and how ...

Every state but Hawaii, California and Florida is likely to get a taste of wind chills of 20 degrees or colder.

The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a ...

The easy answer is a deep southward dip in the polar jet stream that typically rings the globe at higher latitudes but is ...

The coldest burst of Arctic air this season is coming to put an icy exclamation point on America’s winter of repeated polar vortex invasions ... central and southern Florida exempted ...

The coldest burst of Arctic air this season is coming to put an icy exclamation point on America's winter of repeated polar vortex invasions, meteorologists warn. And it will stay frozen there all ...

US about to get 10th and chilliest polar vortex this winter Meteorologists expect strong winds to make the cold feel even worse. Every U.S. state but Hawaii, California and Florida have some or ...

The polar vortex is coming back. After a half-month hiatus, frigid air will again surge across the United States beginning this weekend through next week, as the unusually cold blob of air dips ...