A Major Hurricane with 145mph winds should be more symmetrical than Dean is. The latest IR loop from GHCC shows some strange Vortice swirls spinning off of the Eye. http://wwwghcc.msfc.nasa.gov/GOES/goeseastconusir.html
That's odd... as best I can tell, it doesn't appear to be an issue of cooler SST's, shear or dry air.... And I'm naturally going to defer to Clark that an ERC is still several hours away....