A blast of fall-like weather is coming for much of the United States, and unlike the last brief break from summer heat, this cooldown will have some staying power. It will feel more like late ...

Fall is in full swing, but it’s not too soon to look ahead to winter, especially one that could feel considerably different than last year’s dominated by El Niño. A weak La Niña is expected to develop ...

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 ...