Already starting to see hints of the aforementioned potential -EPO on the GEFS & EPS as we near mid-Dec. Highly amplified planetary waves like this, esp when they're over the N Pacific, where the jet stream is zonal asymmetric, love to retrograde westward (planetary vort adv). https://t.co/7HzV0Zeomh pic.twitter.com/pTBqBB8NUD

— Eric Webb (@webberweather) November 26, 2020