Complex sentence: The convective feature was caused by an anticyclone located over northern South America, which was opposite of the typical flow for September; it was also responsible for the formation of Hurricane Fern, Tropical Storm Heidi, and two tropical depressions.
Split into simpler sentences: The convective feature was caused by an anticyclone located over northern South America, which was opposite of the typical flow for September. It was also responsible for the formation of Hurricane Fern, Tropical Storm Heidi, and two tropical depressions.