While tracking towards the north-northeast, the storm began to gradually weaken as a result of increasing southwesterly wind shear and colder sea surface temperatures. At about 1200 UTC on September 2, Isaac was downgraded to a tropical storm.
As the storm moved north-northeast, it weakened gradually because of increased southwesterly wind shear and cooler sea surface temperatures. On September 2 at around 1200 UTC, Isaac was downgraded to a tropical storm.