#SSW is still on track in most forecast systems, but I got to say I'm slightly underwhelmed right now with the wave forcing for this event- I think that minor #SSW on 1/28 did a lot of the heavy lifting and not much more was needed to weaken the #polarvortex furhter. pic.twitter.com/bn2LbR1Ip7

— Dr. Amy H Butler (@DrAHButler) February 8, 2023