Over the next 10 days, scientists say, changes in the stratosphere will upend weather patterns and set the stage for a cold, snowy December across parts of the Northern Hemisphere.

Tuesday’s geomagnetic storm lit up skies across the US with dazzling auroras. Another wave could bring the show back tonight.

Intense lake-effect snow is creating dangerous travel conditions in the Great Lakes and it’s all being fueled by a record ...

(CNN) — A serious flood threat is on tap for some of the driest areas of the United States as an ailing former Hurricane Priscilla combines with another storm system to create a long-lasting rainfall ...

(CNN) — A marine heat wave spanning much of the North Pacific Ocean is already influencing the weather in North America and is poised to make its mark on winter. The unusually warm ocean water, coined ...