Complex sentence: On September 10, a poorly organized band of stronger winds developed around the center, and Gustav was designated a fully tropical storm shortly before turning toward the north and brushing Cape Hatteras, then accelerating toward the northeast and away from the coast.
Split into simpler sentences: On September 10, a poorly organized band of stronger winds developed around the center, and Gustav was designated a fully tropical storm later that day. The storm then turned toward the north and brushed Cape Hatteras later that day, before accelerating toward the northeast and away from the coast.