Destructive winds along with other exceptional conditions are creating exceptional fire risk in Colorado and Wyoming.

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 ...