Just a note - the 12Z GFS is showing a very deep core on Rita around shortly before it impacts the coast. I'm mentioning this becuase globals (except for CMC) rarely give tropical deep cores becuase they can't resolve them due to lack of detail in the runs.

Links --
Pressure loop: http://moe.met.fsu.edu/cgi-bin/gfstc2.cg...;hour=Animation
Cyclone phase: http://moe.met.fsu.edu/cyclonephase/gfs/fcst/archive/05092012/18.html

--RC