Tropical Storms Juliette, Octave, and Sonia also made landfall in Baja California or northwestern Mexico, bringing with them heavy rains and strong winds.

Steered northeastward amid favorable atmospheric conditions, a period of rapid deepening ensued, and the system was upgraded to a Category 1 hurricane at 18:00 UTC on May 29.

[18] Even though Hurricane Barbara struck a largely undeveloped stretch of coastal lagoons, containing small fishing villages,[19] two elderly people were killed in Oaxaca.

Steered northwest and eventually west-northwest, the cyclone intensified amid favorable atmospheric dynamics, becoming a minimal hurricane by 12:00 UTC on June 25 and attaining peak winds of 85 mph (135 km/h) twelve hours later.

After attaining peak winds of 80 mph (130 km/h) six hours later, the influence of drier air and increasing shear caused the storm to begin a weakening trend.

After becoming devoid of convection, Dalila degenerated into a remnant low at 06:00 UTC on July 7 while located roughly 460 mi (740 km) south-southwest of Cabo San Lucas, Mexico.

Initially, moderate easterly shear prevented much organization as the system tracked west-northwest; however, a reprieve in upper-level winds by 0000 UTC on July 5 allowed the depression to intensify into Tropical Storm Erick as convective bands gained more curvature.

A period of steady intensification over the next day allowed the system to attain Category 1 hurricane intensity at 0600 UTC and reach its peak with winds of 80 mph (130 km/h) and a minimum barometric pressure of 983 mbar (983 hPa; 29.0 inHg) six hours later.

Steered westward amid a favorable environment, the cyclone steadily intensified, attaining peak winds of 70 mph (115 km/h) at 12:00 UTC on July 27 as an eye became evident on satellite imagery.

At 00:00 UTC on July 30, the system weakened to a tropical depression; twelve hours later, it degenerated into a remnant low while located near the northern coast of Kauai.

[57] Following Flossie's crossing into the Central Pacific Hurricane Center's warning zone, a tropical storm watch was issued for Hawaii and Maui counties on July 27.

With a small circulation, the cyclone entered a period of rapid deepening, intensifying into a Category 1 hurricane at 18:00 UTC on July 31 and attaining peak winds of 85 mph (135 km/h) a day later.

By 18:00 UTC on August 11, the effects of increasing wind shear caused Henriette to degenerate into a remnant low while positioned roughly 430 mi (690 km) south of Kailua-Kona, Hawaii.

[66] On August 10, the CPHC began monitoring a trough located roughly 1,300 mi (2,100 km) east-southeast of the Big Island of Hawaii for potential development.

The disturbance formed a weak surface low three days later but ultimately opened into a trough as it entered the CPHC's area of responsibility on August 14.

Resuming its northwest track around a mid-level ridge across the central United States and Mexico, Ivo attained peak winds of 45 mph (70 km/h) before crossing a sharp sea surface temperature gradient.

[81] In the United States, flash flood watches were issued for Pima County,[82] extending westward across western Arizona[83] and into Southern Nevada.

Heavy rains in Nevada, amounting to nearly 4 in (100 mm) at Mount Charleston, caused significant flooding; damage in the Las Vegas Valley reached $300,000.

Lorena weakened to a tropical depression at 12:00 UTC on September 7 and degenerated into a remnant low six hours later while located 60 mi (95 km) west-southwest of Santa Fe, Mexico.

Amid a favorable environment, the cyclone steadily intensified after designation, attaining peak winds of 65 mph (105 km/h) by 18:00 UTC on October 7 as a partial eyewall became evident on satellite.

While passing south of the coastline of Mexico, the wave interacted with a large area of disturbed weather at the base of an upper-level trough, and the two features eventually merged by October 7.

Gradually recurving northeast around a subtropical ridge, the cyclone steadily strengthened amid a favorable atmospheric environment, reaching a peak intensity of 65 mph (105 km/h) by 18:00 UTC on October 13.

The system moved ashore near Cabo San Lazaro, Mexico at 05:00 UTC on October 15 with maximum winds of 45 mph (70 km/h) and quickly weakened over land.

[108] An area of convection, possibly in relation to a tropical wave that emerged off the western coast of Africa on September 16, developed along the ITCZ on October 7.

Despite this, it acquired sufficient organization to be deemed a tropical depression by 00:00 UTC on October 14 while located about 810 mi (1,300 km) south-southwest of the southern tip of Baja California.

Steered northwest and north around a mid-level ridge over Mexico, the depression became a tropical storm by 06:00 UTC and attained peak winds of 45 mph (70 km/h) six hours later.

[109] A disturbance within the ITCZ was first identified over the southwestern Caribbean Sea on October 13, crossing Central America and entering the East Pacific over the subsequent three days.

Executing a clockwise loop, significant cold water upwelling and increased upper-level winds caused the cyclone to weaken abruptly, deteriorating to tropical storm intensity by 06:00 UTC on October 23.

[116] A strong upward pulse of the Madden–Julian oscillation pushed across the East Pacific during the last week of October, yielding the formation of a broad area of low pressure.

Gradually recurving northeast in response to a series of troughs to the system's north, the cyclone only slowly organized under moderate wind shear, and the depression intensified into Tropical Storm Sonia by 00:00 UTC on November 3.