Bertha's forward motion hasn't decreased from what I can tell, if anything, it's moving faster, and maybe more north than west. Regarding the pinhole eye, I've been thinking all day that Bertha was a borderline Cat 4 in the making, and now I think it's finally close to peaking in the early stages of an eyewall cycle.
-------------------- Hugh
Eloise (1975) - Elena and several other near misses (1985) - Erin & Opal (1995) - Ivan (2004)