Recent satellite images offering dvorak numbers much stronger than the 11am advisory of 65kts, already... It may simply be that a more rapid period of intensification is taking place but the wind field has simply not yet responded. Recent looping IR, WV, and Visual imagery all suggest robust intensification under way.

Additionally, the upper air wind overlays show a bit of outflow jet developing on the NW quadrant, toward Bertha's direction of motion. As well...over all, the subtle semblances of light shear appear to have been replaced by more symmetric outflow in general. This combined with amply warm water, there really isn't any compelling reason to argue against intensification overall; but more importantly, the repeatedly learned lesson is that when hurricanes are given a lease on life like that they tend to exercise that right at least excuse imaginable...and go on ahead to "surprising" everyone for how they did this and that in "such a short period of time".

We'll see...

John