Complex sentence: Cooler waters and wind shear began to weaken the hurricane, and by the end of July 22, Dora had already weakened to a tropical storm and soon dissipated on July 24, just west of the Baja California Peninsula.
Split into simpler sentences: Cooler waters and wind shear began to take toll on the hurricane, and by the end of July 22, Dora had already weakened into a tropical storm. Dora dissipated on July 24, just west of the Baja California Peninsula.