The extended GEFS, run after run, continue to not only strongly signal a stronger than average stratospheric polar vortex, but even indicate a potential return to a near record strong vortex after it weakens from anomalously strong to just above average in the short term: https://t.co/FsOf2rnbzO pic.twitter.com/s1AzHJXiMo

— Tomer Burg (@burgwx) January 2, 2023