It is very typical GFS behavior to lose a system at day 4.5. I would imagine it will trend back to a Euro solution. Huge height falls and the surface getting colder has to be watched closely. This can be a perfect track for initial WAA snow, flip to mix and then a rapid flip back to snow if mid levels crash as well. Very dependent on 5H capture position. Hopefully this is the first of many bowling balls we see this winter.