Yoinked this from the southeast thread but it seems to make sense and thought you people would like to see it.
I've seen him post about this a few times, but Anthony M has this theory / observation about storm evolution during retrograding -NAO blocks....the first few storms track north (across New England) and feed into the developing block, then the next one or two storms are suppressed events when the block is retrograding (best potential across the South), with the finale being a traditional Mid-Atlantic to New England nor' easter as the block lifts out.
The previous retrograding block episode that we just had went down that way. There was a storm across New England on Jan 26...then the Raleigh thundersnow storm on Jan 28, then the traditional nor'easter on Feb 1