For example, recent observations indicated that fragments of the polar vortex broke apart, sending freezing air towards Central Florida. This shift can lead to unusual weather patterns, even in ...

While forecasters can't yet say for sure, a warmer stretch of weather appears likely for much of the nation. Here's when to ...

With the polar vortex intensifying next week, the jet stream will acquire strength, however, in an approximate west-to-east pattern across the U.S. and southern Canada, AccuWeather senior ...

There's a confounding dilemma for many folks trying to make sense of winter weather in the context of climate change.

Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and ...

The polar vortex, a mass of frigid Arctic air, pushed southward, causing temperatures around Niagara Falls to drop drastically. This sudden chill led to an extraordinary phenomenon: the mist from the ...

Michigan is experiencing frigid temperatures and heavy snow due to a dip in the jet stream, not the polar vortex. The polar vortex is a large-scale cyclone of cold air that typically stays far north ...

Michigan are bracing for the coldest weekend of winter as Arctic air plunges south.

This winter’s harsh run is intensifying, with some of the coldest air so far this season plunging into New Hampshire.

New York is bracing for the coldest air of the winter this weekend, with snow. Learn how the polar vortex is involved.

This winter’s harsh run in the East is intensifying, with some of the coldest air so far this season plunging into Vermont this weekend.