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 currents increased on August 11. By August 12, a tropical wave and an upper-level low interacted and created a large area of disorganized thunderstorms from the western Caribbean Sea into the central Bahamas.