A significant weather phenomenon, known as the polar vortex, is anticipated to cause a drastic drop in temperatures across the United States, particularly after Thanksgiving and into December. Meteorologists warn of an Arctic blast that could lead to unusually cold weather, impacting areas from Minnesota to Chicago and beyond. A rare stratospheric warming event is also underway, potentially causing a major disruption of the polar vortex and leading to more severe winter weather conditions. Forecasters expect that December may trend colder and snowier than usual due to these developments, with experts advising residents to prepare for the impending chill.