The GFS is forecasting a 6-sigma warming event at the top of the stratosphere. In other-words, a once-in 1.38 million year event under a normal distribution of data. Clearly a significant event is seen. Will it be that extreme? Probably not, but certainly significant. pic.twitter.com/JiaFzEHUP2

— Mark Margavage (@MeteoMark) December 31, 2022