The most likely scenario is for a surface trough to develop in the west central Gulf. With the subtropical ridge building across Florida and an approaching mid level trough, it will allow for copious moisture to stream northward. Precipitable water values may exceed 2.25".
Details will come into better focus in the next 24-48 hours, but it looks like S Louisiana, S Mississippi, S Alabama, and the FL panhandle may receive excessive rainfall. I know here in Mobile we have received 13 inches for the month. Some places could have some flooding concerns if this pans out.
We shall see

ALhurricane