The 1986 Pacific hurricane season featured several tropical cyclones that contributed to significant flooding to the Central United States.

[4][5] The season began with the formation of Hurricane Agatha on May 22 and ended with the dissipation of Tropical Depression Twenty Five on October 25, spanning 147 days.

[3] The 1986 Pacific hurricane season's first tropical disturbance formed 865 mi (1,390 km) from the tip of Baja California Sur on May 20.

[2] Rainfall spread around both the Atlantic and Pacific Mexican coasts, peaking at 10.75 in (273 mm) at Xicotepec de Juarez, Puebla.

After Blas's convection dissipated, the EPHC ceased advisories on June 19[2] while situated roughly 600 mi (965 km) south of Cabo San Lucas.

An eye became evident on satellite imagery and the hurricane reached its peak intensity of 90 mph (140 km/h) on June 28 at 1600 UTC as it tracked near Socorro Island.

The storm began to weaken as thunderstorm activity became displaced from the center and spread northward over Arizona and California on July 6.

The high waves washed away five beachfront homes and severely damaged dozens of others on the beach resort of Vacation Land.

[3] The EPHC began monitoring a tropical disturbance located 195 mi (315 km) southwest of San Salvador on 1800 UTC July 23.

The disturbance kept up its rapid forward motion, crossed the dateline and entered the western Pacific, where it reformed and reached its peak intensity as Severe Tropical Storm Georgette.

A tropical disturbance developed from this wave 50 mi (80 km) south of Acapulco on August 15, the same day that the system moved offshore.

Despite an increase in forward speed, Tropical Storm Javier underwent rapid intensification, reaching hurricane intensity at 0900 UTC August 21.

After maintaining its intensity for 18 hours, Kay rapidly weakened over cold water, and was downgraded into a depression at 0000 UTC September 2.

[2] Due to a combination of strong wind shear[3] and cold water, Lester began a slow weakening trend.

Steered by an upper-level trough located over the Western United States, the system moved westward and developed into a tropical depression at 1200 UTC on September 18.

The system steadily intensified as it paralleled the Mexican coast, and was upgraded into Tropical Storm Newton early on September 20.

At 0600 UTC September 21, the EPHC reported that Newton had attained hurricane strength while located about 200 mi (320 km) west-northwest of Manzanillo, Colima.

After moving north-northwest, the hurricane briefly turned northwest, in the general direction of the Baja California Peninsula the next day.

At this time the tropical cyclone was situated about 60 mi (97 km) north of La Paz, Baja California Sur.

In addition, the navy, army, and police were on high alert in populated areas like La Paz due to the hurricane.

[26] On the mainland, roughly 700 people evacuated to shelters in Huatampo, a city that at that time had a population of 9,000, and Yavaros prior to landfall, but within hours after the passage of the hurricane, all but 127 had returned home.

[27][9][10] Because Hurricane Newton, along with a cold front, was predicted to cause heavy rains over portions of the United States, flash flood warnings and watches were issued by the National Weather Service for parts of western Texas, New Mexico, and Arizona.

[2] The outer eyewall moved across Cabo San Lucas, and the resultant land interaction was believed to have slightly weakened the inner core of the hurricane.

[32] Near the area around where it made landfall, strong winds knocked down trees and caused disruptions to city services.

[2] A vigorous upper trough was deepening offshore Baja California, and Roslyn began to re-curve within a few hundred miles of Manzanillo.

[2] The low-level center rapidly dissipated, although a frontal low developed in the western Gulf of Mexico, which moved over southeastern Texas and later through the Mississippi Valley.

Cool sea surface temperatures and its proximity to Hurricane Estelle eventually caused the depression to dissipate late on July 18.

By 1800 UTC on July 29, it had become poorly organized around 1,000 mi (1,610 km) west-southwest of the Hawaiian Islands, and the final advisory was issued.

[3][38] An area of disturbed weather developed a circulation on August 12 and was upgraded into Tropical Depression Twelve nearly 700 mi (1,100 km) south of the Baja California Peninsula.

[2] Even though no more official systems developed, a forecaster at the National Hurricane Center remarked that an unnamed tropical storm may have formed in November.