As the storm tracked northwestward towards the coast, its structure decayed, and the chance of tropical cyclogenesis decreased markedly.

The disturbance made landfall between Bahias de Huatulco and Salina Cruz, Oaxaca, during mid-day October 16 and dissipated a few hours later.

There, rainfall flooded and damaged roads and caused rivers to spill their banks; hundreds of homes and other structures were inundated by floodwaters.

In Guatemala, the streets of several towns were flooded, and landslides and felled trees blocked roads and damaged structures.

A tropical wave located in the Caribbean Sea tracked westward, crossing over Central America and entering the Eastern Pacific Ocean around October 13–14.

[1] The National Hurricane Center (NHC) first forecast on October 11 that a broad low-pressure area would form within the next few days.

Atmospheric convection, also known as thunderstorm activity, increased in organization as the system tracked northwestward, located to the south of Guatemala, on October 15.

[1][4] The NHC expected the system to become a tropical storm before reaching the southern coast of Mexico as the latter was located within a favorable environment of warm sea surface temperatures and low-to-moderate northeasterly wind shear.

[1][5] The system advanced towards the northwest, moving along the southwestern boundary of a mid-level ridge which was located over the Gulf of Mexico.

[9] In Juchitán de Zaragoza, at least 100 homes, as well as schools, public buildings, and a library were inundated with water up to 500 mm (20 in) deep, exacerbating damage from the 2017 earthquake.

[10] The Río de los Perros rose to a level of 4.7 m (15 ft) and spilled its banks in multiple sections.

[11] The communities of Barrio de La Soledad, Santa María, and Santo Domingo Tehuantepec were cut off after the Chapala River spilled its banks.

Floodwaters inundated homes in Santo Domingo Tehuantepec and forced the closure of Highway 200 near Morro Mazatlán.

The Las Cañas river overflowed in Apopa, trapping a cargo truck, but the driver managed to escape.

[24] Authorities worked to clear 135 landslides and 58 felled trees, moving over 4,000 m3 (140,000 cu ft) of debris.

Bean crops sustained damage throughout the country, with 183,060 quintals or 10 percent of the seasonal production having been destroyed.

[25] Villa Nueva was placed on alert after heavy rainfall caused a significant increase in the height of the Villalobos River.

[28] A three-car accident occurred in Ciudad de Plata, with one vehicle damaging an under construction metro line stop.

Winds felled a tree near San Lucas Sacatepéquez, causing it to damage a dining room at a hotel, killing one person and injuring two more.

[29] The streets of several other towns were flooded, including Palajunoj, El Tejar, San Cristóbal, Villalobos, Escuintla, and Amatitlán.

In Peronia City, 27 people were evacuated after rainfall damaged three homes; the structures were at risk of falling into a ravine.