With the N Pacific ridge migrating poleward, GEFS spies the onset of the Alaskan Ridge regime for early-mid January -- bringing colder weather more widely to the US & ending a potentially record-setting Arctic Low regime. However: the Arctic Low regime then comes straight back... https://t.co/rbwh6EKdv2 pic.twitter.com/nxc9j3erQM

— Dr Simon Lee (@SimonLeeWx) December 30, 2021