In the winter, a disruption in the polar vortex can occur as it tends to expand in the Northern Hemisphere, pushing that cold air farther south, according to the National Weather Service (NWS).

A polar vortex is unleashing extreme winter weather across the United States, affecting millions with dangerous cold, heavy snowfall, and treacherous icy conditions. The US National Weather ...

According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need to know. Hotspots ranked Start the day smarter ☀️ Funniest cap ...

A polar vortex could bring the coldest January the U.S. has faced in years. National Weather Service experts told Newsweek ...

A polar vortex is descending on the U.S. What does that mean? ... a meteorologist with the National Weather Service's Weather Prediction Center. "Particularly the Rockies, ...

Specifically, the National Weather Service in Cleveland said a couple of inches of snow are possible in northwest Pennsylvania, with an inch or less in northeast Ohio.. Cover your plants! Weather ...

A National Oceanic and Atmospheric Administration graphic shows cold air surging south into the U.S. from the polar vortex above the north pole.

The polar vortex is aways around - it just normally stays near the North Pole. But when it descends into our area, get ready for really cold weather.

The windchills during the Polar Vortex in January 2019. The National Weather Service defines a wind chill index as the apparent temperatures which take into account the combined effect of lowering ...

Experts say the polar vortex is starting to loosen its grip around the North Pole and break apart. ... a meteorologist at the National Weather Service’s regional forecast office in New Jersey. ...

The National Weather Service said the polar vortex always exists near the poles, but weakens in summer and strengthens in winter. The term "vortex" refers to the counter-clockwise flow of air that ...

A phenomenon called the Polar Vortex is responsible for one of the nation's coldest periods in two decades. ... Could be so cold the National Weather Service is calling them life threatening, ...