The mechanism involves atmospheric waves that bounce between the upper atmosphere and ground level, amplifying weather ...

Despite a warming climate, bone-chilling winter cold can grip parts of the U.S. In a study appearing in Science Advances, ...

Three factors are combining to increase the likelihood of a weaker polar vortex this winter, the website reports. And a ...

There are more ways than we knew for the stratospheric polar vortex to get disrupted, shooting cold air southwards across ...

The Polar Vortex,an atmospheric phenomenon that shapes our winter weather,has been gaining attention as it undergoes changes ...

Since the Ice Ages, the Polar Vortex has acted as a climatic gatekeeper. When breached, it unleashes freezing air into regions unprepared for it. This decade, those breaches are becoming more frequent ...

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

Sweltering heat happens every summer, but to get close to the bar of a state's all-time hottest temperature usually takes a heat wave that's on another level.

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

Maps show the cities about to experience extreme humidity and heat Humidity will soon surge to extreme levels across 40 states. Find out where there will be excessive heat and humidity — and how ...

View the latest weather forecasts, maps, news and alerts on Yahoo Weather. Find local weather forecasts for Chicago, United States throughout the world ...