Tuesday Forecast: Bundle up! Today will be the coldest day of the season, with daytime highs only managing to reach the upper-50s to lower-60s. A fairly brisk wind out of the north will make the air ...

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges south into the U.S., Europe and Asia. Studies show that a fast-warming Arctic is partly to blame for ...

The next round of bitter cold was set to envelop the southern U.S. on Tuesday, after the first significant winter storm of ...