What the polar vortex is and isn’t 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.

LOUISVILLE, Ky. — The end of the workweek has spoiled us with snow melt thanks to high temperatures in the 40s and 50s. Mother Nature will soon remind us that it still is the Winter Season ...

LOUISVILLE, Ky. (AP) — At least nine people have died in the most recent round of harsh weather to pummel the U.S., including eight people in Kentucky who died as creeks swelled from heavy rain ...

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 ...

LOUISVILLE, Ky. (AP) — 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 ...

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 ...

In Kentucky, Louisville recorded 7.7 inches (nearly 20 centimeters) of snow on Sunday, shattering the date's previous record of 3 inches (nearly 8 centimeters) set in 1910.

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 ...

NORFOLK, Va. — The plunging polar vortex brought subfreezing temperatures Tuesday to some of the southernmost points of the U.S., threatening to dump snow on parts of Texas and Oklahoma in the ...

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 ...