Convection steadily increased and banding features developed during the day on October 1. Satellite intensity estimates indicate the system became Tropical Depression Thirteen-E at October 2. Low-level circulation had tightened up considerably and satellite intensity estimates indicated the depression had strengthened into Tropical Storm Lorena about south-southwest of Acapulco. Lorena tracked steadily west-northwestward at eight to the remainder of the day and gradually turned toward the northwest early on October 3. The peak intensity of occurred later that day as Lorena took a more northerly track when it was located about southwest of Manzanillo, Mexico.