When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation ...

The polar night jet, the high-altitude winter wind that circles the Arctic, acts like a flywheel for the cold season in the Northern Hemisphere. As climate change erodes the temperature contrast that ...

A Polar vortex has covered the Philadelphia region under a canopy of frigid temperatures, but many people may not realize what a Polar vortex actually is, and the dangers — like frostbite — such ...

A weakened polar vortex is expected to bring frigid Arctic air to the central and eastern United States. Louisville could see temperatures in the single digits with wind chills as low as -8 degrees. A ...

A strong polar vortex doesn't cause cold weather — it does the opposite. Here's what to know about polar vortices, how they ...

A weakened polar vortex is pushing frigid Arctic air into the central and eastern United States. Michigan will experience its coldest temperatures over the weekend, with some areas dipping below zero.

Boston has seen just one day so far this month where the average temperature was above the seasonal norm, daring me to ask — are you over the cold yet? Astronomical winter hasn’t even arrived (that ...

If you couldn’t get enough of the cold temperatures in early December, there’s more on the way for Tennessee this coming weekend. A polar vortex is bringing Arctic air into the United States, and ...