depression trekked west-northwest along the southern periphery of a subtropical ridge, intensifying into Tropical Storm Greg six hours after formation and reaching peak winds of 50 mph (85 km/h) by 00:00 UTC on August 12 as deep convection flared near the center and upper-level outflow became well established. Northerly shear from nearby Fernanda and a nearby upper-level trough caused Greg to level off and maintain its status as a low-end tropical storm for several days as steering currents collapsed. Drifting south, stronger upper-level winds caused Greg to weaken to tropical depression intensity by 18:00 UTC on August 14 before degenerating into a remnant low by 00:00 UTC on August 16. The low was absorbed into the ITCZ shortly thereafter. Hurricane Hilary A tropical wave moved off the western coast of Africa on August 4, eventually organizing into a tropical depression south of Mexico by 18:00 UTC on August 19. Twelve hours later, the depression intensified into Tropical Storm Hilary. The newly named system tracked west after formation, steered on the south side of a subtropical ridge. Favorable upper-level winds and warm ocean temperatures allowed it to quickly intensify, and Hilary became a hurricane by 00:00 UTC on August 21. After leveling off briefly, the cyclone attained its peak as a Category 2 hurricane with winds of 105 mph (185 km/h) early the next morning, consistent with a ragged eye on infrared satellite imagery. Hilary entered a progressively cooler ocean after peak, resulting in the loss of deep convection. The system fell to tropical storm intensity late on August 24, tropical depression intensity late on August 25, and degenerated to a remnant low by 00:00 UTC on August 26. The low moved generally west until dissipating early on August 28. Tropical Storm Irwin The formation of Irwin can be traced to a tropical wave that emerged off Africa on August 10. It continued west, fracturing into two portions near the Leeward Islands; the northern half aided in the formation of Hurricane Katrina, whereas the southern portion continued into the eastern Pacific. Steady organization led to the formation of a tropical depression by 12:00 UTC on August 25 and intensification into a tropical storm twelve hours later. With the center located on the edge of deep convection, Irwin attained peak winds of 50 mph (85 km/h) early on August 26 before northeasterly wind shear prompted weakening. The cyclone fell to tropical depression