and further into Tropical Storm Gilma six hours later while curving from west-southwest to west-northwest. Further organization brought Gilma to hurricane strength around 18:00 UTC on July 15 and major hurricane intensity by 06:00 UTC the next day. By this point, satellite imagery revealed a system with a cloud shield about in diameter and an eye about wide. Immediately after peak, the effects of cold waters and dry air began to affect Gilma, and the storm weakened rapidly. It degenerated to a disturbance after 00:00 UTC on July 20 while located well west of Baja California. Its well-defined circulation tracked north of Hawaii before dissipating on July 27. Hurricane Hector The third in a series of major hurricanes began as a tropical disturbance and accompanying tropical wave south of Guatemala on July 19. The system moved west-northwest, becoming a tropical depression around 00:00 UTC on July 22 and Tropical Storm Hector six hours later. Further strengthening brought the system to hurricane strength by 12:00 UTC on July 23, after which time a well-defined eye developed on satellite imagery. Hector became a major hurricane around 00:00 UTC on July 25 before rapidly strengthening to a Category 4 storm with winds of six hours later. The cyclone continued west-northwest into a sharply more hostile environment of cold waters and dry air, causing weakening that resulted in Hector's degeneration to a disturbance after 18:00 UTC on July 29. The remnants of the storm drifted westward and dissipated northeast of Hawaii on August 2. Hurricane Iva In early August, the Atlantic's Tropical Storm Bess crossed Mexico. Its remnants emerged into the Eastern Pacific, where they redeveloped into a tropical depression by 06:00 UTC on August 11. Very warm ocean waters facilitated the system's rapid intensification, and it strengthened into Tropical Storm Iva six hours after formation before becoming a hurricane around 06:00 UTC on August 13. Iva moved west-northwest over increasingly cool waters, and it degenerated to a disturbance after 06:00 UTC on August 15 to the west of Baja California. The remnants tracked into the Central Pacific and dissipated on August 21. Rainfall accumulations of were observed along eastern shores of the Big Island and Maui. Hurricane John In mid-August, three tropical disturbances developed in close proximity across the East Pacific basin. The middle disturbance slowly organized as it moved west to west-northwest, becoming a tropical depression by 00:00 UTC on August 18.