The first one on the 23rd will probably be in the form of an arctic cold front with some back end snow on the NW side in northern ontario. It will probably lack a lot of moisture.
Storm number two is the one focused on in this thread looks like it will be a major storm or at least a storm cutting up to the eastern lakes, running the apps or hooking inland of the east coast. The 12z run backed off a bit on intensity but that is to be expected this far out and will change many more times. The main thing is the fact that the GFS has had this storm for several runs now. This morning I had a chance to look at the latest monthly control run of the ECM which takes this storm further south off the east coast. That just shows how some of the ECM ensembles are further east with this storm but it doesn't mean much this far out. Interesting nonetheless.
Another storm will come in almost immediately behind this one and the first storm. Very interesting pattern coming up with a very active northern jet racing across the country. All 3 systems have the potential to bring quick hitting snow up across the great lakes in the matter of just 5 days.