Simplify the following text for a Grade 12 native English-speaking person.
Original: It was well-organized from the start , and on September 11 , even before it entered the Atlantic , the National Hurricane Center believed that it could quickly develop into a tropical depression .
Simplified: It was well-organized from the start , and on September 11 , even before it emerged off the coast , the National Hurricane Center believed that it could quickly develop into a tropical depression .