Please see the attached Active Storm Advisory – Atlantic for Wednesday, August 16, 2017.
Invest 91L continues to be very poorly organized. Satellite loops show a broad low-level circulation center with this wave, however, there is no deep convection with the system, and existing convection is displaced mostly to the west of the center. Numerical guidance is not strengthening 91L much on its way west, and forecasts call for it to become a tropical depression as it moves into the Caribbean. 91L will have a limited amount of favorable environment to achieve any sort of intensification before later moving into a poorer one.