Arctic polar vortex breaks down early, raising risk of cold snaps

A massive ring of wind high above the Arctic, known as the stratospheric polar vortex, has slowed down and temporarily reversed direction weeks earlier than any previously recorded event. Normally, this vortex acts as a barrier that keeps the coldest air locked over the North Pole. Because this barrier has faltered, forecasters warn that lobes of frigid air could eventually push south toward North America, Europe, or Asia within the next few weeks as the disruption works its way down to lower atmospheric levels. However, experts note that not every disruption guarantees severe surface weather, and the current event is expected to be brief as vortex winds are forecast to recover.