The entire northwest and western side is sucking dry air from Louisiana and Texas. I think it is too much for Isaac to overcome (not that I am complaining). If it weren’t so slow moving, this could be a non-event. I suspect it has not been upgraded due to this dry air and the havoc it has created for organization. Now that it is organizing a bit, perhaps they will upgrade it. This is odd as they have been quick to upgrade everything for years to raise the storm count in support of Global Warming.