Record cold temperatures are once again expected to hit a swath of the country this weekend—even plunging Florida into its coldest stretch of the last 15 years, potentially bringing snow to areas of ...

A stronger polar vortex is developing over the Arctic. Here's what it could mean for winter, including the role of a powerful El Niño.

The polar vortex is taking shape over the North Pole, and it is starting the season stronger than normal. That might sound ...

A strong polar vortex and 'super' El Niño are developing, leaving experts split on how they could Tennessee winter.