Both basins' seasons ended on November 30; these dates conventionally delimit the period during which most tropical cyclones form in the northeastern Pacific Ocean.

[5] On May 30, an area of intense shower and thunderstorm activity located 270 mi (430 km) to the south of the Mexican coastline intensified into a tropical depression.

Drifting towards the north and then east-northeast around an area of high pressure centered off the southern coast of Mexico, the depression began to strengthen over 84 °F (29 °C) water.

After being downgraded to a tropical depression by June 2, data from two cargo ships, the Androemda and Santa Maria, were helpful in locating Adrian's center of circulation as it moved towards the Mexican coastline.

On June 4, the system made landfall 240 mi (390 km) east-southeast of Acapulco; however, no damage associated with the tropical cyclone was reported, and Adrian dissipated later that same day.

Moving quickly towards the west over warm sea-surface temperatures, the depression strengthened into Tropical Storm Beatriz just twelve hours after formation.

Since Beatriz briefly posed a threat to Mexico and California, the Hurricane Hunters were put on standby, but no flights were made into the storm.

[9] An area of disturbed weather located several hundred miles to the south of Acapulco organized into a tropical depression on July 4.

Moving towards the west-northwest over warm sea-surface temperatures, the depression intensified into a tropical storm on July 5, receiving the name Calvin.

Reaching a peak intensity of 50 mph (85 km/h) later that day, Calvin began to move north-northwest around the western periphery of a high pressure system located over extreme northern Mexico.

Located 98 mi (158 km) south-southeast of Cabo San Lucas on July 8, Calvin further weakened to a tropical depression and turned to the west.

[10] Based on satellite imagery and data from a nearby ship, Yamazuru, a tropical depression formed far away from land on July 10.

Passing 254 mi (409 km) north of Clipperton Island, the depression began to strengthen under favorable atmospheric conditions, and was designated Tropical Storm Dora twelve hours after formation.

Moving towards the west-northwest, Dora attained hurricane status on July 13; subsequently, the ship Amestelmolen reported seas of 30 ft (9.1 m), a minimum barometric pressure of 981 mbar (29.0 inHg), and 79 mph (127 km/h) winds as it passed 29 mi (47 km) north of the storm's center.

As Dora reached its peak intensity of 90 mph (150 km/h) on July 14, a well-defined eye became apparent on satellite imagery, and the storm turned more towards the west.

While retaining its intensity, the depression moved west-northwest before bending towards the southwest as it intensified into Tropical Storm Eugene on July 18.

After passing 83 mi (134 km) south of Socorro Island, the storm accelerated west-northwest, reaching a peak intensity of 50 mph (80 km/h) early on June 19.

After changing little in intensity for nearly 24 hours, Eugene dissipated on July 21 while located 700 mi (1,100 km) west of the Baja California Peninsula, over water temperatures of 73 °F (23 °C).

Above warm ocean temperatures, the depression strengthened to become a tropical storm twenty-one hours after formation, and after briefly turning towards the west-northwest, Fernanda attained hurricane status on August 9.

Turning towards the northwest, Fernanda began to enter an area of cooler ocean temperatures and higher wind shear, subsequently weakening.

Although Greg weakened into a depression, it maintained a well-defined center of circulation for an additional 24 hours until dissipating at 1800 UTC on August 22 over 600 mi (970 km) east-northeast of Hawaii.

Accelerating, Hilary reached its peak strength of 85 mph (140 km/h) while located 250 miles (400 km) west of Cabo San Lucas.

[4] Due to its track just north of Hawaii and rapidly weakening in the Central Pacific, its only effect on the Hawaiian Islands was to disrupt the trade winds, leading to an increase in humidity.

The tropical cyclone passed over the southern tip of the Baja California Peninsula on 1700 UTC October 7; at the time of the landfall Lidia was located about 65 mi (105 km) northwest of Cabo San Lucas.

[4] The remnants of Lidia continued their northeast track, ultimately emerging into the Southern United States,[11] bringing moisture to extreme southeastern Arizona.

[13] Due to the damage wrought by both Lidia and Norma, Sinaloa Governor Antonio Toledo Corro declared his state a disaster area.

Under favorable environmental conditions, the depression began to organize, and became a tropical storm twelve hours after formation, receiving the name Max.

[8] Subsequently, Norma began to undergo a period rapid intensification;[4] the storm soon reached major hurricane status.

Sharply bending back towards the west-northwest, and eventually the north, Otis reached a peak intensity of 85 mph (135 km/h) before higher wind shear and cooler sea surface temperatures began to impede on the system's organization.

[4] Per the Japan Meteorological Agency, Typhoon Freda briefly existed in the basin as a dissipating tropical storm before being absorbed by another extratropical low on March 17,[29] but the system is not recognized by either NHC or CPHC.