The polar vortex, as explained by the National Weather Service, is a large area of low pressure and cold air that encircles the Earth’s poles. Even though it’s often framed in the media as a weather ...

Kentucky under winter storm threat amid deadly floods, thousands without power More than 95 million people in the U.S. are facing gripping cold Tuesday as a polar vortex sends temperatures ...

'Life-threatening cold' expected as polar vortex stretches across U.S. after deadly weekend flooding Meteorologists said several states would experience the 10th and coldest polar vortex event ...

LOUISVILLE, Ky. — Harsh cold descended on the nation's midsection Monday as a polar vortex gripped the Rockies and Northern Plains on the heels of weekend storms that pummeled the Eastern U.S ...

LOUISVILLE, Ky. — Harsh weather moved west on Monday as a polar vortex was expected to grip the Rockies and the northern Plains after winter storms pummeled the eastern U.S. over the weekend ...