That post I made was based on the link Beach posted to Hurricane City..based on Heberts research...very long list of major hurricanes that passed thru & impacted S Fl.
Like Clark said earlier in this era of technology the boxes are not viewed in the same they may have once been.
Personally I find it an interesting ananomly & will be watching to see if Dean passes thru either one of them.
Click on the link & read about it..Hurricane City is a good site with alot of information.

Edit to add...BTW SFWMD model plot has the 1st box highlighted. The plots can be found on the main page or by clicking the NHC map of Dean on the left under the Current Storms heading.