[11] At 12:00 UTC on June 21, the storm attained its peak intensity with maximum sustained winds of 60 mph (97 km/h) and a minimum barometric pressure of 997 mbar (29.4 inHg).

On July 10, the convective pattern began to show signs of organization about 403 mi (649 km) south of Acapulco, Mexico, and the system received its first Dvorak satellite classification.

By early on July 13, a single low-level circulation center had become established and Tropical Depression Three-E formed about 330 mi (530 km) southwest of Manzanillo, Mexico.

[14] The depression moved west-northwestward, and quickly became Tropical Storm Cosme on July 13, about 425 mi (684 km) south of Cabo San Lucas, Mexico.

The thunderstorm activity associated with the wave increased on July 18 when the disturbance was centered about 808 mi (1,300 km) south of the southern tip of the Baja California Peninsula.

Moving on a general west-northwest track, the system became Tropical Storm Erick and simultaneously attained peak intensity with maximum sustained winds of 40 mph (64 km/h) and a minimum pressure of 1001 mbar (hPa; 29.56 inHg) July 22.

Reduced to a swirl of low clouds, Dalila dissipated as a tropical cyclone on July 28, while located about 650 mi (1,050 km) west of the southern tip of Baja California.

[25] While steering currents weakened,[23] Flossie began to develop a cloud-filled eye on August 27, and was upgraded to a hurricane based on that and wind estimates of 75 mph (121 km/h).

Flossie's remnants caused flash flooding in San Diego and Riverside counties in California, dropping 2 inches (51 mm) of rain in one hour.

Situated roughly 850 mi (1,370 km) southwest of Cabo San Lucas, Mexico, the system quickly intensified and became a tropical storm six hours later, and was named Gil.

[38] Late on September 6, Gil intensified into a Category 2 hurricane, peaking with maximum sustained winds of 100 mph (160 km/h) and a minimum barometric pressure of 975 mbar (28.8 inHg).

[41] Tropical Depression Gil eventually absorbed the remnants of Henriette, but dissipated by 00:00 UTC on September 10 while about 1,150 mi (1,850 km) east of the Hawaiian islands.

Once the wave reached the western Caribbean Sea on September 5, the shower activity increased and the whole system continued slowly westward over Central America.

It is estimated that Tropical Depression Twelve-E had formed that day, at which time it was centered about 634 mi (1,020 km) southwest of the southern tip of Baja California.

Although some easterly shear continued to affect the system, very deep convection persisted near the center, and based on Dvorak intensity estimates, Kiko strengthened into a hurricane around September 23.

Kiko's remnant low persisted and continued moving generally westward for several more days with intermittent, minor occurrences of deep convection within the circulation.

A slight increase in convection became apparent on September 24, and was followed by a period of consistent thunderstorm activity near the circulation center as the depression continued in the west-northwest direction.

Low-level circulation had tightened up considerably and satellite intensity estimates indicated the depression had strengthened into Tropical Storm Lorena about 350 mi (560 km) south-southwest of Acapulco.

[49] By October 4, the forward speed of Tropical Storm Lorena had decreased to around seven to nine mph (11 to 14 km/h) and strong upper-level southwesterly shear began to adversely affect the cyclone.

[49] Tropical Depression Fourteen-E developed from a small swirl of low clouds that was first observed along the Intertropical Convergence Zone well to the south-southwest of Baja California on September 30.

[50] While the system was located about 800 mi (1,300 km) southwest of the southern tip of Baja California, the NHC began to classify it as Tropical Depression Fourteen-E.

Convection redeveloped near the center and Manuel regained tropical storm strength on October 15 about 596 mi (959 km) south-southwest of Cabo San Lucas, Mexico.

The southern portion of the wave continued westward over the Pacific waters south of Mexico and under favorable upper-level winds, it began to acquire banding features and several centers of circulation.

The cloud pattern continued to become better organized and visible satellite imagery showed an intermittent eye feature, and it is estimated that Narda became a hurricane at October 21.

The tropical cyclone became a tight swirl of low clouds with intermittent convection on October 24, as it moved westward steered by the low-level flow and crossing 140°W over the Central Pacific area of responsibility.

[61] Shortly thereafter, no significant intensification was predicted, as the cloud pattern was becoming elongated, vertical wind shear would soon increase, and Octave would soon entering a region of decreasing sea surface temperatures.

[64] Early on November 2, Octave attained its peak intensity with maximum sustained winds of 85 mph (137 km/h) and a minimum barometric pressure of 980 mbar (hPa; 28.94 inHg).

[57] Wind shear began to increase, while sea surface temperatures were decreasing, causing the low-level circulation to become gradually displaced from the associated deep convection.

[67] Deep convection associated with Octave remained minimal, and the system had degenerated into a remnant low located about 1,715 mi (2,760 km) west-southwest of the southern tip of Baja California at 00:00 UTC on November 4.

[72] After the 2001 season had begun the name Adolph was retired, and Israel, the original replacement for Ismael, was permanently withdrawn, both for political considerations, after controversy arose over their use.