Winter Holdover Fishing....Dead as a Door Nail

It's been over a week now since I have seen a winter striper or caught one.  I have been out several times and I know of fishermen who have been out when I wasn't fishing.  It's the same story in the upper Bay....nothing. I tried several spots tonight with another fisherman I met and we both got nothing.  I suspect the stripers that were in the Providence River wintering over have scooted out into the Bay for parts unknown during this recent spell of warm weather.  I'm uncertain about whether those fish will return.  We just might have to wait for the migrating fish to arrive in early April or late March.