Complex sentence: On June 10, an area of disturbed weather associated with a broad low pressure area off the coast of Belize organized over the warm waters of the Caribbean Sea, and became the first tropical depression of the season.
Split into simpler sentences: On June 10, an area of disturbed weather associated with a broad low pressure area off the coast of Belize organized over the warm waters of the Caribbean Sea. The low further developed, and became the first tropical depression of the season.