[4] On June 1, the season began in the Central Pacific warning zone (between 140°W and the International Date Line); however, no storms occurred in the region until July.

Therefore, a storm with a longer duration, such as Hurricane Ioke, which arrived with a total of 32.2250 units and then crossed to the Western Pacific, will have high values of ACE.

[24] Prior to affecting the coastline, the Mexican meteorological agency issued a heavy rainfall advisory, also mentioning the potential for flooding and mudslides, for the states of Jalisco, Colima, Michoacán, Guerrero, and Oaxaca.

[42] It crossed over into the Central Pacific early on July 24 and was predicted to affect Hawaii as a tropical storm; however, Daniel encountered weak steering currents in the open ocean, causing it to slow down considerably.

It moved generally north-northwestward, reaching tropical storm status on July 22 and passing about 175 mi (280 km) southwest of Manzanillo, Colima.

On July 26, Emilia again reached peak winds of 65 mph (105 km/h), and shortly thereafter it passed about 60 mi (95 km) southwest of the southern tip of Baja California.

Despite marginally favorable upper-level winds, the system organized enough to be declared a tropical depression on August 1, several hundred miles southwest of Acapulco, Mexico.

[50] A tropical wave exited Africa on July 31, and after no development in the Atlantic, it crossed Central America into the northeastern Pacific Ocean on August 10.

The system continued to become organized, and it developed into a tropical depression around 1800 UTC on August 15 about 650 mi (1,050 km) south-southwest of the southern tip of Baja California.

It is estimated that Hector reached its peak intensity of 110 mph (175 km/h) at 0600 UTC on August 18, while centered about 1,035 mi (1,666 km) southwest of the southern tip of Baja California.

[52] After the remaining shower and thunderstorm activity dissipated on August 22, the cyclone turned westward in response to the low-level easterly wind flow.

Two days later favorable conditions again allowed for rapid strengthening, and Ioke attained Category 5 status on August 25 before crossing the International Date Line.

[65] On August 23, about 48 hours after forming, Ileana reached major hurricane status and a peak intensity of 120 mph (195 km/h), with a minimum pressure of 955 mbar (28.2 inHg).

[64] As Ileana was heading north along the Mexican coastline, slight rainfall was recorded along the coast,[66] which caused some flooding in Nayarit, Jalisco, Colima, Michoacán, and Baja California Sur.

[71] Hours later, the hurricane underwent another eyewall replacement cycle,[72] and subsequently weakened to Category 3 status as it paralleled the Mexican coastline a short distance offshore.

[83] Tropical moisture from the storm also produced rainfall in Arizona and southern California, where eight separate mudslides occurred, trapping 19 vehicles but causing no injuries.

Soon after, wind shear increased due to the outflow of powerful Hurricane John to its east,[85] and Kristy moved into an area of cooler waters and drier air.

[85][90] Another burst of thunderstorms warranted Kristy being upgraded to tropical storm status again on September 5; by that time, the wind shear decreased and the track moved over warmer waters.

[91] Kristy turned back to the west, falling again to tropical depression status on September 6, after thunderstorms decreased due to dry air.

[85] The remnant disturbance continued westward, and initially Kristy was believed to have developed into Tropical Depression Two-C in the central Pacific Ocean; however, post-season analysis concluded the systems were separate.

[93] Tropical Storm Lane produced heavy rainfall and high seas along the west coast of Mexico, including Acapulco where flood waters reached 16 inches (41 cm) in depth.

It moved northeastward due to the influence from nearby Hurricane Lane, and organized enough to be declared Tropical Depression Fourteen-E on September 16 while located about 500 miles southwest of Cabo San Lucas, Mexico.

After reaching a peak intensity of 45 mph (70 km/h), vertical wind shear and cooler waters rapidly weakened the storm, and the circulation decoupled from the convection on September 17.

Despite the presence of wind shear, it organized enough for the NHC to initiate advisories on Tropical Depression Sixteen-E on October 9 about 1,360 miles (2,190 km) to the west-southwest of the southern tip of Baja California.

Late on October 13, after the development of a low-level circulation and persistent convection, the CPHC classified the system as Tropical Depression Four-C about 750 mi (1,210 km) southwest of Honolulu, Hawaii.

Concurrently, the convection tracked northeastward ahead of the upper-level trough, which contributed to heavy rainfall and flooding on the island of Hawaii on October 17.

[114] Initially, Tropical Depression Eighteen-E was located in an area of light wind shear, and the NHC anticipated further organization and strengthening to near hurricane status.

After a curved band of convection developed, it is estimated the system formed into Tropical Depression Twenty-E around 0000 UTC on November 11, about 550 mi (890 km) southwest of Manzanillo.

With deep convection, prominent rainbands, low wind shear, and a moist environment, Sergio intensified as it turned southeastward, steered by a trough to its northeast.

With a small, distinct eye located in the center of the deep convection, Sergio rapidly intensified to attain peak winds of 110 mph (180 km/h) about 6 hours after becoming a hurricane.