Unless a storm has closed Port Canaveral, the calls are up to the Captain on a day by day basis. That allows the maximum flexibility as well as giving the guests the best possible experience.
Storms can move...so making a call days or a week ahead based on predictions isn't too smart. If the predictions were wrong, everything is a mess! Bottom line--the ship isn't going anywhere near a hurricane or tropical storm, and you'll have a great cruise.