So if I'm reading this correctly cluster-1 with the highest percentage supports this statement below? Cluster-4 has it too but not so much for the southeast
"If the Hudson Bay vortex ends up being two separate areas as is hinted at, that could open the door for more cold air damming to sneak in east of the mountains."
Not that it is any more likely as 31% isn't a fantastic chance to start with but decent among 4 cluster possibilities.