A lobe of the polar vortex, a ring of freezing air typically found near the ... Because of a trend toward a more southerly ...

The polar vortex's icy grip on much of America has Arctic Greenland seeming like a toasty vacation spot by comparison.

The annual explosion of cherry blossoms along the Tidal Basin frames the Washington Monument in the distance, Thursday, April ...

North Pole-level wind chills and temperatures will strike 20 states this week, marking the country’s 10th consecutive polar ...

Meteorologists had predicted that parts of the U.S. would experience the 10th and coldest polar vortex event this season.

The polar vortex has taken on an unexpected pattern this winter - one that’s made part of the United States the most ...

Harsh weather moved west on Monday as a polar vortex was expected to grip the ... of the Rocky Mountains stretching from Colorado to Washington state, with the danger rated highest in Utah.

The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a ...

But at times some of the vortex can break off or move south, bringing unusually cold weather south and permitting warmer weather to creep up north.

WASHINGTON (AP) — The polar vortex hit its peak across much of America on Wednesday, with an icy grip that made Arctic Greenland seem like a toasty vacation spot in comparison. Even Mars has ...