During the season, 4 eastern Pacific systems (Julio, Karina, Lowell, and Marie) developed, at least in part, from tropical waves that had already produced named storms in the Atlantic basin.

Tropical Depression Five-E made landfall along the south-western Mexican coastline in July 2008, producing heavy rainfall in parts of southwestern Mexico, which these rains triggered flooding that killed two people and left roughly $2.2 million in damages.

All three groups cited the effects of the ongoing La Niña, as well as the continuation of a multi-decadal decline in Pacific hurricane activity, as their reasoning behind the below-average forecasts.

The first storm of the year, Alma, developed on May 29 farther east than any other Eastern Pacific cyclone on record, excluding Atlantic systems that crossed over into the basin.

The newly formed system intensified into a tropical storm six hours later, earning the name Alma, and attained peak winds of 65 mph (105 km/h) around 18:00 UTC as an eye-like feature became apparent on satellite.

The cyclone only slowly organized in a moderate wind shear regime, becoming Tropical Storm Boris six hours later and remaining fairly steady state for a few days thereafter.

In an environment of low shear but abundant dry air and marginal ocean temperatures, the depression intensified into Tropical Storm Cristina around 12:00 UTC on June 28 before attaining peak winds of 50 mph (80 km/h) six hours later.

Abundant dry air and stronger upper-level winds capped the storm's organization to intermittent, amorphous bursts of convection that eventually dissipated, and Cristina degenerated to a remnant low around 18:00 UTC on June 30.

[11] An organized tropical wave departed the western coast of Africa on June 19 and reached the waters south of the Gulf of Tehuantepec late the next week.

As upper-level winds increased further and Douglas tracked northwest into cooler waters, it began a weakening trend that ended in its degeneration to a remnant low around 06:00 UTC on July 4.

[12] Due to the proximity to land, outer rain bands associated with Douglas produced tropical storm force winds in Manzanillo, Mexico.

[13] Moisture associated with Douglas produced light rain over parts of Baja California Sur, with heavier amounts in Todos los Santos.

[15] Strong easterly wind shear prevented the formation of banding features while keeping the overall cloud pattern disorganized,[16] and the depression moved ashore near Lázaro Cárdenas, Michoacán, early on July 7 without attaining tropical storm intensity.

[21] The system then tracked into cooler waters and stronger upper-level winds, causing it to fall below hurricane intensity by 06:00 UTC on July 18 and degenerate to a remnant low early the next morning, although it maintained a well-defined circulation.

By July 25, however, Genevieve moved into warmer waters and attained its peak as a Category 1 hurricane with winds of 75 mph (120 km/h);[34] its satellite presentation at this time was characterized by hints of an eye within a small central dense overcast.

[35] Encountering strong northerly wind shear, the cyclone began a steady weakening trend shortly thereafter and ultimately degenerated to a remnant low around 12:00 UTC on July 27.

[34] On July 24, a tropical wave exited the west coast of Africa, which traversed the Atlantic Ocean and eventually entered the eastern Pacific on August 2.

[53] One-C was being steered toward the west due to easterly trade winds caused by large subtropical high-pressure area located northeast of Hawaii.

High pressure to its north directed Iselle on a northwest trajectory, while moderate easterly wind shear limited the storm peak to 50 mph (80 km/h) on the morning of August 14.

Increasing upper-level winds, cooler waters, and entrainment of dry air all hindered the system, causing it to weaken to a tropical depression around 00:00 UTC on August 16 and degenerate to a remnant low a day later.

An area of high pressure over Mexico directed the nascent cyclone north-northwest, while moderate upper-level winds prevented Julio from strengthening beyond 50 mph (80 km/h).

Around 00:00 UTC on August 25, the storm made landfall approximately 40 mi (65 km) west-southwest of La Paz, Baja California Sur, with winds of 45 mph (70 km/h).

Slow weakening occurred as Julio entered the Gulf of California, and it fell to tropical depression intensity around 00:00 UTC on August 26 before degenerating to a remnant low eighteen hours later.

The cyclone moved along the western periphery of an anticyclone over Mexico, and this feature imparted strong upper-level winds on Lowell that limited its peak strength to 50 mph (80 km/h).

With light upper-level winds, Marie began a period of quick intensification on October 3, bringing it to hurricane strength at 18:00 UTC that afternoon and to a peak of 80 mph (130 km/h) the next morning.

The hurricane soon began to enter cooler ocean temperatures, prompting a gradual decline in intensity before Marie degenerated to a remnant low around 00:00 UTC on October 7.

Steered by a mid-level ridge to its north, the depression gradually intensified, becoming Tropical Storm Norbert a day after formation and attaining hurricane strength around 06:00 UTC on October 7.

Forty percent of homes were totally or partially damaged on the islands of Margarita and Magdalena, mainly having lost their roofs, said a report from state protection services.

La Paz international airport suspended its activities at midday local time Saturday, but the tourist resort of Los Cabos remained open.

The development of a tiny eye-like feature signified the storm's peak strength of 45 mph (70 km/h) before increasing upper-level winds caused Polo to degenerate to an open trough by 06:00 UTC on November 5.