As the polar vortex begins to stir, subtle clues point to the coming seasonal shift. So, when will freezing temperatures arrive in Indiana?

The polar vortex is stirring up, bringing the earliest hints that the weather is changing with the new fall season. When is the first frost in Tennessee?

According to climate scientists, record levels of Arctic ice in 2025 could increase cold spells in the United States and ...

The polar vortex is a broad, fast ribbon of cold air that encapsulates the Arctic high in the stratosphere. Stable, it ...

The polar vortex is stirring up, bringing the earliest hints that the seasons are changing. When will Wisconsin see its first ...

Summer may end on a cooler note for parts of the U.S., with meteorologists suggesting that a weakened polar vortex could ...

Temperatures are staying relatively warm throughout Illinois this week, despite fall officially starting Sept. 21. But ...

HOUSTON, Texas (KTRK) -- With this most recent freeze now behind us, many Houstonians are probably wondering if another freeze could impact them this winter. When it comes to freezes, forecasters ...

The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a normal pattern that is stronger in the winter and keeps some of the coldest ...

The polar vortex is beginning to stir, signaling the first signs of seasonal change. Here's when to expect the first frost in ...

It's already a lot to endure frigid winter conditions, but what happens when we get an unwelcome visit from an even colder spell of air like a polar vortex? "A polar vortex is simply that: a vortex ...

Persistent blasts of Arctic air have been keeping it bitter cold. — -- Once again the relentless stretch of bitter cold battering Northeastern cities including Boston with record snow has many ...