The most notable tropical cyclone of the year was Hurricane Isis, which killed fourteen people when it made landfall on southern Baja California Sur and coastal Sinaloa in Mexico.

One tropical cyclone, Hurricane Lester, affected Central America, causing two deaths in Guatemala, and later brought heavy rains to southern Mexico.

Three tropical cyclones brought light to moderate rainfall to the southwestern United States, and one hurricane produced rough surf along the coast of California.

The ITCZ, which is normally situated south of the Gulf of Tehuantepec, shifted northward into Central and Southern Mexico, making the cyclone closer to cooler sea surface temperatures, hence limiting the number of storms that formed during the season.

[4] Accumulated Cyclone Energy is, broadly speaking, a measure of the power of a storm multiplied by its duration, so longer-lived hurricanes have higher ACEs.

[7] However, Agatha quickly strengthened, developing a curved band of convection wrapping around its center,[8] and early on June 11 it attained a peak intensity of 65 mph (105 km/h) while about 615 miles (990 km) southwest of the southern tip of Baja California.

Convection in the area organized steadily, and late on June 19, the system developed into Tropical Depression Two-E about 260 miles (420 km) south-southwest of Manzanillo, Mexico.

On becoming a tropical depression, the system maintained a large, elongated, low-level circulation with some banding features and restricted outflow due to wind shear.

The National Hurricane Center first predicted that the depression would intensify, reaching winds of 50 mph (80 km/h), though two computer models projected it to quickly dissipate.

Convective banding features increased as the broad circulation became better defined, and on June 22, the disturbance developed into Tropical Depression Three-E about 575 miles (925 km) south of the Gulf of Tehuantepec.

Blas quickly strengthened and reached its peak intensity on June 25, with maximum sustained winds of 140 mph (230 km/h), while about 575 miles (925 km) south-southeast of the southern tip of Baja California.

It moved westward due to strong wind shear without further organization, and crossed Central America into the eastern Pacific Ocean on July 11.

Shortly thereafter, a mid- to upper-level anticyclone turned Celia to the west-northwest and forced it to pass about 150 miles (240 km) south-southwest of Cabo San Lucas.

Convective banding features gradually developed, and it is estimated that the system organized into Tropical Depression Five-E early on July 23 about 720 miles (1,160 km) south of the southern tip of the Baja California peninsula.

[17] The eye became more distinct while surrounded by an area of deep convection, and on July 25 the hurricane reached peak winds of 115 mph (185 km/h) about 850 miles (1,370 km) southwest of Cabo San Lucas.

The wave moved across the Caribbean Sea and the southern Gulf of Mexico before crossing Central America into the eastern Pacific Ocean on July 28.

Its intensification continued as a well-defined eye about 30 miles (48 km) in diameter became visible on satellite imagery, and on August 2 Estelle reached its peak intensity of 135 mph (217 km/h).

It tracked west-northwestward under the influence of a ridge to its north, and organized into Tropical Depression One-C on August 19, about 1,000 miles (1,600 km) southeast of the Hawaiian Islands.

High wind shear from an upper-level trough continually weakened the system, and on August 19, the Central Pacific Hurricane Center issued the final advisory on the tropical depression about 365 miles (587 km) south of Hilo on the island of Hawaii.

Convection was intermittent at first, though it gradually organized and persisted near the center, and on August 20, the disturbance developed into Tropical Depression Nine-E about 345 miles (555 km) south of Puerto Angel, Mexico.

An eye developed as outflow organized further, and Howard began to rapidly intensify to reach peak winds of 150 mph (240 km/h) about 600 miles (970 km) south-southeast of the southern tip of Baja California.

[35] In Mexico, Isis destroyed more than 700 houses and killed 14 people,[34] primarily due to heavy rainfall of more than 20 inches (510 mm) in southern Baja California Sur.

[36] Moisture from the remnants of Isis extended into the southwestern United States, resulting in light rainfall, dozens of traffic accidents, and power outages for thousands of residents in San Diego County.

The subtropical ridge to its north resulted in a general west-northwest motion,[39] and the depression slowly intensified into Tropical Storm Javier late on September 7.

Banding features in the system did not organize significantly, and on September 8, Javier attained a peak intensity of 60 mph (97 km/h), which coincided with a sharp increase in convection over the center.

On September 11, the National Hurricane Center issued its final advisory on Javier, though later analysis indicates that it remained a tropical cyclone as it turned southeastward.

Javier made landfall about 35 miles (56 km) east-southeast of Cabo Corrientes, Jalisco early on September 14, and dissipated within 12 hours of moving ashore.

The wave axis continued westward, and after crossing Central America convection increased as it tracked northwestward, and the system organized into Tropical Depression Fourteen-E on October 15, about 200 miles (320 km) south of Guatemala.

It moved northwestward and late on the 15th it intensified into Tropical Storm Lester, about 115 miles (185 km)/h) south of the border of Mexico and Guatemala, before attaining hurricane status on October 16.

[53] Moisture brought around the northeast periphery of the Sierra Madre Occidental led to a narrow band of heavy rainfall along the upslope side of the mountain range, with a local precipitation maximum exceeding 14 inches (360 mm).