Upcoming Polar Vortex 2025. January is shaping up to be the coldest in a decade as the polar vortex dips south across the eastern half of the united states — shocking a nation that has enjoyed an. Arctic attack to begin 2025:

In its january to march 2025 outlook, the nws said polar vortex winds were expected to remain strong through january, meaning there was a low to medium (20 to 50 percent) chance of a modest cold. The interaction between a stable polar vortex and the block at high latitudes is crucial for the future course of winter.