on september 12, originated from a tropical wave that left the west coast of africa. it then began to develop and become more organized moving westward. on september 16, it became a tropical depression and was 580 miles (930 km) east of barbados. the storm quickly became more tropical. it became a tropical storm the same day in 84 °f (29 °c) waters, in favorable conditions of the 80 °f (26.5 °c) that tropical storms usually require.