The chances of this being an H4-H5 while always being possible because everything is, are VER VER VERY slim. A whole trough of high level air is coming to severely lessen Ian.
Please make sure you tell your friends and family that the chance of that happening is like maybe...0.5%. Panic can be just as dangerous as the truth.
I should add that it's NEVER a bad idea to get out of the projected path of a storm. Go to a Motel 8 somewhere out of Florida and over to Alabama. (Unless the map gets Donald Trumped with a sharpie).
All kidding aside, like I said, never a bad idea to go north and west to get away from this storm. Motel 8 with some free Wifi, eat Chic-fil-a for a couple days and there is no risk from the storm.
-------------------- The safest way to deal with a potential Hurricane hitting you...is to leave and just not be there at all.