On October 6, bad weather near the Leeward Islands formed into a subtropical depression, a storm that is not a proper tropical storm. It then strengthened into Subtropical Storm Otto, and a few hours later the National Hurricane Center believed that it was a fully tropical storm, and it became Tropical Storm Otto. On October 8 Otto strengthened and became a Category 1 hurricane out in the Atlantic. Soon after, Otto began to weaken and was no longer a hurricane when it passed west of the Azores. 