I'm looking at the upper air charts and will comment shortly...looking at visible satellite; Issac is moving towards the NNW at present and will move back over open water very, very soon. The mass of convection and rain closer to FL and moving west is not indicative of a separate tropical system; the winds aloft are hostile..30 to 40 knots in response to a deep longwave trough that while is lifting out is quite pronounced above 500 millibars shows up quite well on water vapor imagery with very dry air to the overall circulation's NW.