Shortly thereafter, the storm weakened, as the upper-level environment became more hostile, and the system moved over progressively cooler waters. On June 19, Adolph turned to the west, and degenerated back into a tropical storm later that day. On June 20, the storm weakened to a tropical depression, and on June 21, Adolph began to dissipate as its center became devoid of deep convection. As Adolph moved north towards Mexico while about 290 mi (465 km) off the coast, the Mexican government issued a tropical storm warning and a hurricane watch from Punta Tejupan to Cabo Corrientes, Jalisco. When the storm turned to the northwest and later to the west, the government discontinued the warnings as it was determined the storm would not be a threat to land. No damage or casualties were reported. A few days later, on June 24, another weak tropical wave moved off the coast of Africa. It moved steadily westward through the Atlantic Ocean without any development, and entered the eastern Pacific Ocean on July 5. At this point, convection developed along the wave axis, and the system gradually organized. A circulation developed as it passed through an area of warm waters, and the system developed into Tropical Depression Three-E on July 7, while located about 600 miles (965 km) south of Manzanillo, Colima. Although the outer rainbands warmed slightly in the hours after the formation, the convection near the center deepened further with favorable upper-level outflow, and the depression strengthened into Tropical Storm Barbara early on July 8. Barbara steadily intensified, and following the development of a ragged eye that night, Barbara strengthened into a hurricane on July 9, while located about 700 miles (1130 km) south of the southern tip of Baja California Peninsula. After moving into an area of light vertical shear and warm water temperatures, Barbara quickly intensified to reach major hurricane status on July 10. The eye continued to become better organized, and Barbara attained winds of 135 mph (215 km/h) later on July 10. After maintaining its intensity for 24 hours, increased wind shear from an upper-tropospheric trough degraded the appearance of the deepest convection, and the eye became obscured from satellite images. After weakening to a 115 mph (185 km/h) hurricane, Barbara maintained its intensity for 30 hours before moving into an area with very warm waters and a favorable upper-level environment. On July 13, the hurricane re-organized, a distinct eye again developed, and Barbara strengthened to reach its peak intensity of 140 mph (225 km/h) later that day.