Convection increased on August 11, and by August 12 the interaction between a tropical wave and an upper-level low in the area resulted in a large area of disorganized thunderstorms extending from the western Caribbean Sea into the central Bahamas.
Convection increased on August 11. By August 12, the interaction between a tropical wave and an upper-level low in the area created a large area of disorganized thunderstorms. This extended from the western Caribbean Sea into the central Bahamas.