No, it would be before that. Am I right in thinking Sr. Lucia's vision included a bishop dressed in white who might or might not be the pope? In any case, there is no "bishop dressed in white" at a conclave.
Backpack nuke when Rome is full of cardinals? Would God permit such a thing? Does the word "Sodom" ring a bell?
I’m not satisfied that we know the full content of the prophecies.