Are you suggesting immediate effects of the SSW? It looks to me like the vortex at 50mb starts to get punched around a bit at the end of the EPS, so more than likely maybe January something happens. I don't understand why twitter mets will all abuzz of a SSW in December. At least to me, I didn't see evidence of it. The latest talk from fraud Judah was how he is using the polar vortex (not even the tropospheric version) on the GFS to help determine cold shots. I don't understand how that is a good metric for this. There is no immediate response, because you cannot permeate what is virtually a physical boundary between the stratosphere and troposphere.