When Tropical Storm Tammy formed on October 5 , it was the earliest ever in the season that the twentieth storm formed , breaking the previous record held by Storm 20 from 1933 by 21 days . When Tropical Storm Tammy formed on October 5 , it was the earliest ever in the season that the twentieth storm formed , beating the previous record held by Storm 20 of the 1933 season by 21 days .