#S2S As expected, the NH #PolarVortex is very strong for this time of year and looks to stay that way through November.
— Jason Furtado (@wxjay) November 11, 2021
Why?
Wave activity has been shut down across Eurasia (blue areas in 2nd and 3rd plots), which is what drives significant changes in the vortex. pic.twitter.com/Zv3rWRaFXO