 Hurricane Jimena originated from a tropical wave that moved off the western coast of Africa on August 15. The tropical wave traversed the Atlantic Ocean with little or no convective development. On August 25, the National Hurricane Center began monitoring a broad area of low pressure, while the system was located over Central America. The system moved westbound and entered the eastern Pacific Ocean later that day. Initially, there were no signs of additional development. However, shower and thunderstorm activity began to increase and an area of low pressure developed within the wave on August 27. Around 1800 UTC on August 28, the low had become sufficiently organized for the National Hurricane Center (NHC) to designate the system as Tropical Depression Thirteen-E. Upon becoming a tropical cyclone, the depression was situated roughly 220 miles (355 km) south of Acapulco. Tracking westward in response to a mid-level ridge over Mexico, the depression intensified into a tropical storm on 0000 UTC August 29. In real time, however, it was not classified until early on August 29 while located 250 mi (400 km) west of Acapulco.
