a tropical depression at 18:00 UTC on October 11. Steered northwest to west-northwest by a mid-level ridge to its north and a broad cyclonic circulation to its southwest, the depression intensified into Tropical Storm Lester at 18:00 UTC the next day. The system was initially forecast to become a hurricane amid light shear; however, interaction with the coastline of Mexico and the nearby cyclonic circulation instead caused Lester to weaken. Observations from a reconnaissance aircraft indicated the storm degenerated into a trough at 18:00 UTC on October 13. As the cyclone paralleled the coastline of Mexico, a tropical storm warning was hoisted from Punta Maldonado to Lázaro Cárdenas. Rainfall accumulations of 3–5 in (76–127 mm) were observed across Oaxaca and Guerrero, leading to localized flooding. Tropical Depression Sixteen-E A tropical wave entered the eastern Pacific in mid-October, interacting with two previous tropical waves that resulted in a large area of disturbed weather. The system organized into a tropical depression at 00:00 UTC on October 25 about 315 miles (505 km) south-southeast of the Baja California Peninsula. Initially, the cyclone was characterized by a large area of deep convection enhanced from an upper-level trough. This same trough soon imparted strong wind shear, preventing intensification. The depression moved into Sinaloa early that same day and dissipated over the Sierra Madre Occidental at 18:00 UTC on October 26. The depression produced locally heavy rainfall across western Mexico, resulting in some localized flooding. Culiacán International Airport recorded a peak wind gust of 80 mph (129 km/h), suggesting a tornado may have occurred nearby. The remnant mid-level circulation associated with the cyclone interacted with a frontal system to produce strong thunderstorms across the southern Great Plains. Other systems On August 14, the Japan Meteorological Agency had briefly stated that Tropical Storm Malakas had exited the West Pacific basin and entered the Central Pacific basin, as a weakening tropical depression. Storm names The following names were used for named storms that formed in East Pacific in 2004. This is the same list used in the 1998 season. No Pacific hurricane names were retired by the World Meteorological Organization (WMO) Hurricane Committee following the 2004 season, therefore this list was re-used in the 2010 season. Though not retired following the season, 2004's Hurricane Isis would be the last Eastern Pacific tropical cyclone to bear that name. After going unused in 2010, the WMO announced in April 2015