A significant snow storm is looking like a possibility during the 10th-11th time frame (8-9 days away at the time of this post) I have added some important things to look for in the coming days. I do think the convergence point between the polar jet and subtropical jet will trend further south and east. In fact, the convergence point is further south and east on the GFS verses it's 12z run.
When the polar jet and subtropical jet converge, this would trigger convective moisture. Deep cold air would be in place at the same time, so heavy snowfall would occur. Also due to the convergence, very strong upper level winds would occur as well. The convergence is one of the big factors at play that would generate a significant snow event.
When the polar jet and subtropical jet converge, this would trigger convective moisture. Deep cold air would be in place at the same time, so heavy snowfall would occur. Also due to the convergence, very strong upper level winds would occur as well. The convergence is one of the big factors at play that would generate a significant snow event.