Upcoming Polar Vortex 2025. Pieces of the polar vortex are projected to swirl southward out of northern canada and into parts of the u.s. Maps show what to expect as the cold front.

The jet stream typically acts as a barrier to keep the polar vortex contained near the arctic, but at times, some of the vortex can break off or move south, bringing unusually cold weather into. However, a deep freeze, thanks to the polar vortex dipping down from siberia, is bringing an even harsher arctic blast to million americans this week.