There certainly is some shear, but it does look to me like there is a bit of a twist to the clouds as well. The majority of the convection is displaced from what might be a swirl, though, which is just emerging off the Yucatan. It's gong to bring LOTS of rain to the central Gulf today and tomorrow, regardless of development.
-------------------- Hugh
Eloise (1975) - Elena and several other near misses (1985) - Erin & Opal (1995) - Ivan (2004)