Shortly after landfall, Eugene rapidly weakened inland, and was only a tropical storm when it re-emerged into open water, where it quickly dissipated.

Subsequently, the depression slowly began curving to the north-northwest, towards a stationary inverted trough over central Mexico.

[2] The storm slowed down on July 24, and located on the southwest side of an upper-level low,[1] the system turned northwestward.

The weakening system was downgraded to a tropical depression early on July 26, and Eugene dissipated at 1200 UTC that day.

The Mexican navy was put on alert for a total distance of 945 mi (1,520 km) spanning from Acapulco to Guaymas.

[4] Hurricane Eugene brought widespread flooding, heavy rain, and high winds to Colima, which leveled homes and palm trees.

[4] Numerous poorly built homes lost their roofs, though well-built structures did not sustain any significant damage.

[6] In Puerto Vallarta, Hurricane Eugene was responsible for extensive damage to homes and for knocking out power to most of the city, which, along with surrounding areas, was also flooded with 1.5 ft (0.46 m) of water.

[8] Several hundred miles further south, in Tecoman and Pueblo Capos, many homes and public buildings received damage.

[7] In Michoacán, the Grande River spilled over its banks, flooding five villages and leaving at least 10,000 people without transportation or communication services.

Due to a combination of Eugene and Hurricane Greg, the region registered rainfall amounts four times the average.

[6] Authorities in Manzanillo asked for medicine, clothing and food from nearby areas[15] while the red cross treated the injured.

[16] Eugene is one of three known July Pacific hurricane strikes, defined as when hurricane-force winds are estimated to have occurred over land.