[1] The twentieth tropical cyclone and eighteenth named storm of the 2017 Pacific hurricane season, Selma formed from a Central American gyre on October 27.

A small area of disturbed weather developed in the wake of the gyre over the eastern Pacific Ocean off the coasts of Costa Rica and Nicaragua late on October 25.

[1] The storm rapidly weakened to a tropical depression over the rugged terrain of El Salvador, and by 18:00 UTC the same day, the circulation of Selma had completely dissipated.

42 homes were damaged by floodwaters after the Tuma and the Río Grande de Matagalpa rivers rose above flood stage in the Chinandega Department, where 102 families and nearly 1,000 people were evacuated.

Biologists from the University of El Salvador determined that the cause of death of these turtles was consumption of toxic microalgae in a red tide algae bloom.