The above animation covers 30 days and shows two warmings. The first stratospheric warming is shown in the first week of December with a big red blob flowing into the Arctic. Fast forward ahead to today and we find another huge red blob beginning to make a move into the Arctic. Why can I tell? In the last two or three frames, you can see the small lines start to push up into the Arctic in response to warm air pushing north- a common trait with how stratospheric warmings happen.
This was all mentioned in yesterday's big stratospheric post (link here) in how warming in the stratosphere will provoke the polar vortex to sustain heavy damage, possibly to the point of collapse in upper stratospheric levels. That means cold weather starting mid January.