Before the satellite age started in the 1960s, data on east Pacific hurricanes was extremely unreliable.
However, 1938 saw an unusually active season, with numerous tropical cyclones forming in January and a hurricane struck Northern California in February, killing five people.
Two tropical cyclones existed in January, one near the International dateline and another near the Revillagigedo Islands.
A pressure reading of 28.84 inHg (97.7 kPa) was reported in association with this tropical cyclone.
By the next day, it had moved to a location west-southwest or west of Cabo San Lucas.
The storm also downed power lines and damaged crops and trees at a plantation.
[6] On September 1, a possible tropical depression formed south of Cape Corrientes.
A short-lived tropical cyclone existed between Salina Cruz and Acapulco on September 11.
These were probably caused by a tropical cyclone located west of the Revillagigedo Islands.