The National Hurricane Center seems to have its blinders on today. The low pressure system that was mentioned yesterday continues to look like a strong tropical cyclone. The visible satellite imagery shows a clear banded structure with excellent form.
Infrared imagery is showing some shallow convection. This lack of deep convection seems to be the one factor that argues against naming the storm.
All models indicate that this low pressure center is currently warm core and should continue to stay that way. Should this low be classified as a tropical storm, it would be named Delta and become that 28th Atlantic tropical cyclone this season.