Polar Vortex 2025 Us Forecast. Winters with at least one polar vortex disruption/sudden stratospheric warming (ssw) are. In the latest european operational forecast of the polar vortex, the stretched pv is directed at the eastern us and not the.

In contrast, a weak/disrupted polar vortex creates a weak jet stream pattern. The second artic outbreak, or polar vortex, is forecast to arrive between january 7 and 13, bring the coldest air of the season to date.