The dry air currently above Milton in the SE US is expected to wrap around the back side of Milton once it starts its more northerly motion tomorrow. That is what the models are seeing weakening it. The potential issue with that is the tendency of very powerful systems to insulate themselves from that kind of dry air entrainment and sheer. They are simply too powerful and making their own environment at that point - their own outflow and the sinking moisture mitigates any effects. Because Milton is moving in to its own outflow and accelerating at the time of landfall, I fear a scenario where it just wraps itself further into its own created environment and rolls in at strength. The crazy part about that though is that if it does that - it might cause less damage that way than if it spreads a wind field that strong out. This is a historic storm, with no plausible good outcome scenarios, to be honest.
