A cold front will bring plunging temperatures and snow to the Northeast this week. Polar vortex disruptions, caused by Sudden Stratospheric Warming, drive extreme cold southward. Officials advise ...

Waves of frigid air will continue to be released into much of the eastern United States through at least the middle of the month. The ongoing pattern may trend stormier with areas of snow and ice ...

Over the years, passing spacecraft have observed mystifying weather patterns at the poles of Jupiter and Saturn. The two planets host very different types of polar vortices, which are huge atmospheric ...

While Canada enjoyed an exceptionally mild fall, a dramatic flip in the jet stream pattern is underway, bringing about an abrupt transition to winter. Will the return of La Niña and a disrupted polar ...

The US National Weather Service (NWS) has warned that a combination of La Niña, the Madden–Julian Oscillation (MJO) and a rare November Sudden Stratospheric Warming event — often associated with the ...

High above the North Pole, in a largely overlooked part of the atmosphere, a major shift is taking shape. Over the next 10 days, developments in the stratosphere are expected to reshape global weather ...

An Arctic blast could bring freezing temperatures and heavy snow to Kentucky around Thanksgiving weekend. A "sudden stratospheric warming" event may disrupt the polar vortex, potentially causing ...

High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

(CNN) — High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...