Well the forecast track I have been watching has changed drastically from what I saw yesterday. Now the track shows it heading directly for Miami, and then abruptly making a northerly turn right before land fall. So it seems obvious that they really don't know what it is going to do and everyone needs to keep a sharp eye out for this storm.
https://www.ventusky.com/?p=34.4;-72.6;3&l=rain-3h&t=20170911/06&w=soft
https://www.ventusky.com/?p=34.4;-72.6;3&l=rain-3h&t=20170911/06&w=soft