Disruptions to the polar vortex can occur due to chaotic atmospheric forces, such as sudden stratospheric warming events. When this happens, the vortex weakens or even splits, allowing cold Arctic air to spill southward into the mid-latitudes. This can lead to extreme cold snaps in regions like the United States and Europe. However, not all disruptions result in widespread cold weather, as other atmospheric factors also play a role in determining local impacts.