Complex sentence: A cold front moved off the southeast coast of the United States on September 1, and gradually decaying the front degenerated into an area of cloudiness and showers just east of the coast of Georgia on September 2.
Split into simpler sentences: A cold front moved off the southeast coast of the United States on September 1. Gradually decaying, the front degenerated into an area of cloudiness and showers just east of the Georgia coast on September 2.