Polar Vortex January 2025 Path. Gradually, the pv pattern shifts toward greenland late this month and into early january. In the lowest layer of the atmosphere, the troposphere—where weather occurs—there spins a polar vortex that circles the globe year round, a jet stream that’s also.

I have been describing the pv variability as “lather, rinse, repeat” and for the most part that seems to be true. Colder temperatures to the north and.