Verkkowhat is the polar vortex. How does the polar vortex affect our weather? A strong polar vortex favours a strong jet stream. The jet stream is a fast moving. Verkkothe polar vortex has a long and strong history of winter weather impacts over the united states, canada, and europe, especially if it starts to collapse. States of emergency have been declared in a number of us states due to the vortex. In the bitter cold winter months, being outside during. Verkkobut if you like proper winter weather with cold and snow, a weak/disrupted polar vortex is your best bet. As each year is different in the story of the polar vortex, we will look at the latest data in the stratosphere and how a new.