OK so in other words, if TD4/Dean goes thru Herbert, then Miami is in a higher risk? I find that wierd, that this small area of water almost makes it a bee-line for MIA. Interesting, gee you learn something new every day.
I'm quite sure that it has to be of hurricane strength passing through the Herbert Box for the rule to apply. Also this is based purely on past storms trends, and only holds true if steering conditions are set up that way.