Basically what I'm seeing from the guys I follow on twitter (namely Bernie Rayno who's generally on the ball with these things) is that the deciding factor is a trough coming into the east late next week that would push Irma out to sea. If it lifts north, there's nothing to steer Irma away and he seems to think Florida or the Carolinas are the most likely impacts.
But again, that won't be for another week so the models are going to go back and forth. But that's the thing they're watching.
But again, that won't be for another week so the models are going to go back and forth. But that's the thing they're watching.