345 mi (555 km) south of the southern tip of Baja California. Following designation, the depression was slow to organize as a result of moderate easterly shear; by 0000 UTC on May 29, however, the system had gained enough organization to be considered a tropical storm. After attaining its peak intensity with winds of 40 mph (65 km/h) and a minimum barometric pressure of 1003 mb (hPa; 29.62 inHg), increasingly stable air and higher wind shear caused Alvin to begin a weakening trend. At 0600 UTC on May 30, it weakened to a tropical depression, and by 0000 UTC on June 1, Alvin degenerated into a non-convective remnant low. The remnant low continued generally westward until dissipation six days later. Tropical Storm Barbara A tropical wave emerged off the western coast of Africa on May 14. After emerging into the eastern Pacific on May 25, the system acquired enough organization to be considered a tropical depression at 1800 UTC on May 29, about 115 mi (185 km) south-southeast of Puerto Escondido, Oaxaca. Within an environment of weak steering currents, the storm became better organized as evidenced by an improving satellite appearance, with the formation of a curved band in the southeast quadrant. At 1200 UTC on May 30, the depression was upgraded to a tropical storm; by 0000 UTC on June 1, however, increased northerly wind shear caused Barbara to weaken back to a tropical depression. After re-intensifying into a tropical storm for a second time six hours later, Barbara attained its peak intensity with winds of 50 mph (85 km/h) and a minimum barometric pressure of 1000 mb (hPa; 29.53 inHg) at 1800 UTC. Drifting northeast, the storm maintained this intensity until landfall just northwest of the Mexico-Guatemala border at 1300 UTC on June 2. Rapid weakening ensued thereafter, with the system weakening to a tropical depression at 1800 UTC. The low-level circulation dissipated six hours later, marking the dissipation of Barbara. Heavy rainfall exceeding 4 in (100 mm) caused many rivers to swell. An unspecified island was separated from the Mexico mainland after the bridge connecting the two was washed away, stranding dozens of families. In El Salvador, significant flooding killed four people. Gusts peaked at 58 mph (85 km/h) at an automated weather station in Puerto Madero, Chiapas. Across the affected regions, these winds caused damage limited to house roofs and trees. Barbara caused severe crop damage