 By early on September 1, despite a lack of convective organization, the low-cloud circulation was sufficiently well-defined that the National Hurricane Center designated it as Tropical Depression Ten-E, or the tenth tropical depression of the season, about 350 miles (565 km) south of Cabo San Lucas.In real time, the National Hurricane Center first upgraded the system 21 hours later.The depression initially tracked slowly north-northwestward and gradually strengthened.