Polar vortex brings frigid air to US, making Trump's inauguration coldest in 40 years, moved indoors due to cold.

The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously ...

Erin Davis/Axios VisualsA powerful Arctic outbreak tied in part to the polar vortex is set to send temperatures by next week ...

A lobe of the polar vortex will arrive in the United States this weekend, bringing the lowest temperatures in years and snow and ice to the East and Deep South.

The expanding of the polar vortex – an area of cold air around the Arctic – southwards is causing cold spells in the US.

The 10 Weather Impact team issued Alert Days for next week because of the polar vortex being responsible for the cold ...

With the next Arctic Outbreak looming close, we take a dive into what the Polar Vortex is and how it will affect our area: ...

The polar vortex will soon elongate over North America with a dangerous cold moving into sections of Canada and the U.S.

An Arctic air mass from Siberia is approaching and bringing the coldest temperatures of the season with risks of frostbite ...

The polar vortex will be the most expansive in over a decade, encompassing all of Canada and parts of the States. Here’s what ...

Here is what is and isn't a polar vortex when Colorado receives cold like what is forecast for the holiday weekend.

Since the start of the new year, Toronto and much of Ontario have been enduring uncomfortably frigid temperatures, and ...