The "new" GEFS forecast is predicting a significant anticyclonic high-latitude wave breaking event over the North Pacific into the North Pole during the third week of January, whereas the ECMWF EPS is much more muted with the break. This will be an interesting case to watch. pic.twitter.com/7jRbs8P2tl

— Mike Ventrice (@MJVentrice) January 12, 2021