Trump's last administration drew on a NOAA hurricane map with a sharpie to try to convince people he was not wrong about a hurricane path. Changing data is his style.
Both are bad. Trump was wrong because he was speaking on outdated information but he wouldn't accept that he was wrong so his administration created some data so he could say he was right.
I don't think there was ever any information, outdated or otherwise, that suggested that the hurricane was going to hit Alabama. The theory I've heard that the makes the most sense is that Trump saw a report about the damage it was going to inflict on the Bahamas, mixed up Alabama and Bahamas, tweeted condolences to Alabama, and the administration tried to defend his mix-up by concocting fake information to explain it.
(In many respects, if he had just quietly dropped the matter, it would have been largely ignored since it was cleared up pretty quickly; it was the childish response to try to justify why it wasn't a mistake that made it such an issue.)