This is only one model, but here's the thing- the stratosphere is somewhere around its tipping point. The Sudden Stratospheric Warming event we recently had has done a number on the stratosphere. As of right now, the stratosphere is cooling down, but if this big warming comes to light, we may be seeing the 'Big Warm'- when the stratosphere warms for good to accompany the season changing into winter.
Now, the Big Warm is something that is hard to predict, so don't hold me to this. However, at some point the stratosphere has to break into the winter season, and it's only a matter of time now.
This is getting more interesting by the day, folks.