With the sudden stratospheric warming event likely to occur in 5 days or so, its not exactly surprising to see the ECMWF EPS indicating a significant drop in the Arctic Oscillation (AO) as we approach the end of February. Remains to be seen exactly how things shake down. pic.twitter.com/ysMwax0tXy

— John Homenuk (@jhomenuk) February 5, 2018