It's interesting seeing the Gaston system persist while being surrounded by dry air. There is an Upper Level Low centered just North of PR and the DR which is leading Gaston, but it looks to be just far enough away that any southerly shear will remain away from the Gaston system. The SAL is not strong at the moment and there is moisture working its way westward over the tropical Atlantic. The wave over Africa is already showing a hint of circulation, so we'll see what happens to that when it emerges into the Atlantic. Meanwhile, the old frontal trough over the northern GoM is generating some more rain for North-Central FL after a week of very dry air and no rain.