While they generally followed the typical path away from Mexico before dissipating over cooler waters near 25°N, a persistent upper-level trough across the Western United States periodically curved storms into land.

Hurricanes Dora, Eugene, and Fernanda produced generally minor rainfall across the Hawaiian Islands, alleviating drought conditions.

Embedded within weak steering flow, the depression initially drifted towards the west and began to organize amid warm sea surface temperatures and low wind shear.

[5] On June 14, satellite imagery revealed an increase in thunderstorm activity to the south of the Gulf of Tehuantepec, which may have been aided by the passage of a tropical wave.

[6] Moving generally towards the northwest, partially due to Tropical Storm Arlene's large circulation in the Gulf of Mexico, Beatriz reached a peak intensity of 65 mph (105 km/h) by 18:00 UTC on June 19.

Shortly thereafter, the system made landfall near Puerto Escondido, Oaxaca, and rapidly weakened to a tropical depression over the mountainous terrain of Mexico.

Beatriz dissipated at 06:00 UTC on June 20, although the remnant cloudiness and associated convection from the storm spread across portions of the western Gulf of Mexico that same day.

[7] A large area of disturbed weather persisted south of Mexico for several days, perhaps enhanced by a westward-moving tropical wave that departed Africa on June 12.

The newly designated cyclone moved generally toward the northwest, passing about 60 mi (97 km) offshore Mexico near Puerto Escondido on its closest approach.

[8] The precursor disturbance to Three-E produced heavy rainfall along coastal sections of Mexico, peaking at 8.80 in (224 mm) in Santa María Jacatepec, Oaxaca.

As the designated system paralleled Mexico, it contributed to multiple days of rainfall, including in Acapulco, Guerrero where 11.89 in (302 mm) fell between June 26–29.

Following the development of banding features, the disturbance organized into a tropical depression around 12:00 UTC on July 2 while situated 315 mi (505 km) southeast of Acapulco.

Rough seas near Lázaro Cárdenas caused all 4,000 t (4,000,000 kg) of sulfuric acid to leak aboard the previously beached cargo tanker, Betula.

[18] After maintaining that strength for 18 hours, the cyclone encountered an upper-level trough to its west, which caused an abrupt uptick in wind shear while Dora simultaneously moved over colder waters.

[17] The remnants of Dora interacted with a cold-core low near those islands, causing an outbreak of thunderstorms that alleviated ongoing drought conditions there.

Across the Hawaiian Islands, the system produced beneficial rainfall and no major damage, though broken tree limbs and minor power outages were reported.

These swells inflicted damage to shoreline roads on all of the islands, allowing water intrusion into some homes and washing one house several feet off its foundation.

Moisture induced by the interaction of Fernanda and an upper-level trough produced rainfall across the islands, leading to localized flooding on Kauai.

The system moved inland and dissipated over the mountainous terrain of Central America, but an area of convection emerged into the East Pacific on August 11.

The system continued to intensify as it moved west-northwest parallel to the Mexico coastline, attaining hurricane status at 12:00 UTC on August 16 when an eye was first observable on satellite imagery.

[28] After August 23, the hurricane executed a small counter-clockwise loop as it underwent binary interaction with the newly developed Tropical Storm Irwin.

The cyclone maintained a poorly organized appearance for its duration, but observations along the Mexico coastline and from nearby ships suggest Irwin reached winds of 70 mph (110 km/h) at its peak.

[32] Irwin produced a maximum rainfall total of 7 in (180 mm) in Jala, Colima, along with a wind gust to 66 mph (106 km/h) in nearby Manzanillo.

[18][37] As the system passed about 805 mi (1,295 km) south of Baja California Sur around 00:00 UTC on September 6, it was reduced to a bare swirl of statrocumulus clouds.

[43] After peak, the cyclone recurved northeast ahead of an upper-level trough, bringing Lidia onshore south-southwest of Culiacan, Sinaloa, with winds of 100 mph (160 km/h) around 08:00 UTC on September 13.

The system moved west to west-northwest initially, and it developed a small collection of thunderstorms the next day that suggested it was close to tropical storm intensity.

In close proximity to strong upper-level winds, the newly designated cyclone was stripped it of its convection and weakened back to tropical depression strength on October 1.

As it moved erratically over the open East Pacific, it soon became nestled underneath an expansive anticyclone aloft, which provided a low wind shear environment.

Throughout its duration, the system moved erratically as it interacted with the larger circulation of Tropical Storm Norma to the east until finally it was absorbed by that cyclone around 00:00 UTC on October 4.

[48] A large area of disturbed weather was identified south of Acapulco on September 29, potentially spawned by a tropical wave that left Africa 12 days earlier.