Polar Vortex Flips: Early Arctic Shift Stuns Experts

The polar vortex's winds high above the Arctic have reversed direction, an event defining a 'major sudden stratospheric warming' (SSW) that has occurred earlier than any on record. These stratospheric winds normally blow west, containing cold air over the North Pole, but their recent shift to easterly winds can impact the jet stream. Historically, major SSWs have been linked to colder, drier weather in the UK, potentially bringing snow. This event's unprecedented early timing, however, leaves experts uncertain about its influence on upcoming weather patterns.