Katrina could have revved up pretty good but that dry pocket has continuously eroded the northern and western eyewall. One thing that appears to be happening now is the northeast through southwest sectors are filling in with heavy precip and if not for the upcoming landfall the strengthening band of precip attempting to wrap around the center could contract and become the new eyewall. There definitely seems to be a slow but steady movement just barely south of due west and Fort Lauderdale should be the approximate point of landfall later this evening.