Tropical Storm Dorian continues to struggle against a dry air environment and wind shear. However, the latest enhanced satellite images suggest the system is still alive and in fairly good shape considering the odds.
Mid level outflow, feather like cirrus fingers, are present from NNW through to the ENE sectors.
The green denotes the highest cloud tops, most are centrally located. Although they aren't clustered.
The darker shades of white, grey and black are areas of moist air, what's left of it.
It appears that Dorian is still somewhat encased in a small pocket of moisture. The orange-red is drier air ahead of the system.

Bottom image is zoomed out to show the atmosphere in the area and the storm's proximity to the Lesser Antilles and Puerto Rico.