This forecast for East Asia has two strong storm systems located over the region, with one of these troughs placed on the coastal region of East Asia. When you get storm systems near East Asia, there is a 6-10 day gap between what happens in East Asia and what then happens on the East Coast of the US.
This stormy pattern over East Asia looks like it will be very persistent, which tells me that there will be a stormy pattern over the East Coast about 6-10 days later, which puts us at the December 4 - December 8 timeframe. This will likely not be a train of storms, more-so a storm system that develops either near or offshore of the East Coast and stays in place for a prolonged period of time.
The GFS model did show this system developing well offshore, so that is a possible solution.