Keith et al, if the new break becomes the sole current from the oceanside (southway closes), would the flow (current) head toward the channel betweeen N. Monomoy and Morris Island. If so, then a venturi affect would occur from Stage Harbor. Having said that, the west side of Monomoy would have a pretty solid current. The inside of S. Beach from the tub to S. Monomoy would be then be a continuation of the tub at the north (minimal current)? If the southway does close, then North & South Monomoy will probably merge.
Of course, this could all change with potential malestroms.
It will be an interesting season for you and the pack of flats rats.