A rare and potentially disruptive atmospheric event may unfold over the Northern Hemisphere soon, raising the prospect of significant weather shifts across the United States as early March approaches.

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 expect a warm-up.

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.

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