DC swings from a warm 50 weekend to a cold start to the week, with highs in the 30s and a wintry mix as the polar vortex and ...

Scientists are using studies and computer models to draw connections between recent extreme weather and climate change. The ...

Add Yahoo as a preferred source to see more of our stories on Google. Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across ...

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 ...

The polar vortex is splitting — an exceedingly rare phenomenon for this time of year that will be an unusual driver of warmer temperatures, as the calendar flips to March and meteorological spring.

A major winter storm is impacting much of the nation east of the Rocky Mountains. The storm's intensity is caused by a combination of a stretched polar vortex, a wavy jet stream, and moisture from the ...

Across the Northern Hemisphere, familiar seasons are starting to feel unfamiliar. Heat waves linger, cold snaps arrive out of sync, and storms stall over the same unlucky regions. At the heart of this ...

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

As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of Earth’s poles 10 to 30 miles above the surface. The term vortex is used to ...