By October 12, the National Hurricane Center (NHC) deemed the associated low pressure-area well defined enough for it to be considered a tropical depression.

After attaining peak wind speeds of 35 mph (55 km/h), the depression moved ashore between Salina Cruz, Oaxaca, and Arriaga, Chiapas.

[2] The disturbance quickly became more organized[3] and two days later, the National Hurricane Center remarked that the low would likely strengthen into a tropical depression.

[6] Although the depression was initially forecast to briefly reach tropical storm status, this did not occur; instead, it remained a large monsoon-like system with the strongest winds well removed from the center.

The monsoon then developed into a strong upper-level low, and left Central America, and the storm began moving northeastward, while slowly strengthening.

[16] At the risk of flooding, The maximum precipitation was in Huizucar, with 1513 mm,[17] this being the highest cumulative rainfall for the country, up to 4,300 residents sought shelter in schools, churches and public centers.