I agree with Mike's assessment and Isaac seems to be going to cut across the NE most part of the island. That means more water time as it ambles NW'd. I think the intensity forecasts will adjust, perhaps upward, once this unsettled period abates and the storm is able to perform consistently for 6-8 hours. I am not convinced it will not be able to achieve the margins of cat I-II at its peak, so a 90+ peak is possible IMO.