A weakened polar vortex could allow Arctic air to move southward, potentially causing colder-than-average conditions in parts of the United States and Europe. In the U.S., this may result in periods of extreme cold, while in Europe, outcomes depend on additional factors like the North Atlantic circulation. The developing Super El Niño could further influence atmospheric patterns, increasing the likelihood of cold-air outbreaks and precipitation shifts. However, the exact impacts remain uncertain, and regional variations are expected.