Complex sentence: An intense area of thunderstorms developed south of the Gulf of Tehuantepec on July 4, which was classified as a tropical depression at 1800 UTC on July 5 roughly south-southeast of Acapulco.
Split into simpler sentences: An intense area of thunderstorms developed south of the Gulf of Tehuantepec on July 4. The system was first classified as a tropical depression at 1800 UTC on July 5 roughly south-southeast of Acapulco.