The stratosphere continues to be of great interest this month. We see the huge wave-1 forcing responsible for displacing the polar vortex toward N. Europe (NB: not at the surface!), plus two rounds of wave-2, the 2nd of which is really raising my eyebrows... pic.twitter.com/TnNxwi8y1X

— James Peacock (@peacockreports) December 13, 2023