Cold and snowy weather has gripped much of the northern tier of the United States since Thanksgiving, but a pattern change will torch the chance of white Christmas for many.

(CNN) — High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather patterns and set the stage for a cold, snowy December ...

(CNN) — Record cold temperatures have pushed as far south as Florida this morning as wind-whipped snow continues to pile up in the eastern Great Lakes from a brief bout of Arctic air gripping the eastern US. More than two dozen cities, reaching as far ...

The National Weather Service is working to hire back hundreds of positions laid off or otherwise cut by the Trump administration, but it’s progressing at a snail’s pace, forcing many offices to continue to cope with vacancies that could affect winter forecasts.