What Is a Polar Vortex Split and How Does It Affect Weather? A polar vortex split happens when the stratospheric polar circulation weakens and divides into two or more cold-core vortices, most often after a sudden stratospheric warming. This split can redirect the jet stream and open pathways for Arctic air to surge into mid-latitudes, raising the odds of widespread cold and snow in North America and Europe for several weeks. The exact locations and intensity depend on how the lower atmosphere responds to the disruption above.

Ever hear of a polar vortex split? It can twist the jet stream, flip temps, and shift storm tracks. Learn what triggers it and how it might change your winter. Think your area is at risk? #jetstream #polarvortex #polarvortexsplit #suddenstratosphericwarming #winterweather