Dorian is an interesting system. The eastern circulation is probably the upper circulation that is getting wiped out by the dry air. The dry layer exists at the mid and upper levels of the atmosphere (mostly upper) whereas moist air is still in place at the lower levels so that moisture keeps firing bursts of convection near the low level circulation. We are also at the convective minimum for the day so the system is in its diurnally weakest timeframe. Dorian looks to be more like a TD - and barely that, but it will probably ramp up again later this evening. If not, its history.
ED