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 ...

Prepare for a return of frigid weather in March—and April. Editor at Large You could be forgiven for not noticing that last month was the planet's third warmest February on record. That’s because ...

January is shaping up to be the coldest in a decade as the polar vortex dips south across the eastern half of the United States — shocking a nation that has enjoyed an unusually balmy end of the year.

The Mid-Atlantic is in for plummeting temps in the new year. A polar vortex, a massive pocket of frigid air that swirls in place over the North Pole, is expected to spill out and push Arctic temps ...

A wide swath of the western U.S. may be in for below-average temperatures as forecasts suggest an Arctic blast is looming. Reading time 3 minutes Much of the contiguous U.S. could be in for a very ...

Nearly all of New England has seen its share of frigid cold days and record mountain snow so far this November — and looking ahead, we’re about to get hit with another blast of Arctic air from a ...