It will show up.
The storms just backlog everything and it probably didn't pass a scanning point yet. I have had a few packages "lost" from various couriers and then one day it just show up and marked delivered.
Unless it fall off a truck or a tornado hit Memphis...
edit:
Well sheit... tornado destroyed a FedEx facility in Kalamazoo Michigan last week the whole facility gone
https://www.bbc.com/news/world-us-canada-68974369