It’s really, really cold again – as the US shivers through at least the eighth blast of air from the Arctic this winter. Here’s why it keeps happening.

The term “polar vortex” might conjure images of mythical icy storms swirling through the North Pole but in reality it’s a crucial component of our ... Read more The post What Causes the “Polar Vortex” ...

Impact on North America's weather in March - An in-depth look at the forecasted polar vortex collapse and its potential effects on weather patterns across North America this March ...

Last autumn, AccuWeather highlighted the transition from winter to spring as the period when the polar vortex could pay a visit to the U.S. With plenty of cold air in place, the colder pattern ...

The term "polar vortex" usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a normal pattern that is stronger in the winter and keeps some of the coldest ...

Scientists say it’s being caused by a misbehaving polar vortex combining with a key weather pattern that seems to ... of air over the US that storms flow through –— that also separates ...

When the polar vortex is strong, the jet stream tends to flow more powerfully and steadily in a circular pattern around the poles, effectively containing the cold air within the polar regions.