Original: When Subtropical Storm Vince formed on October 8, it was the earliest in the season that the twenty-first tropical or subtropical storm had ever developed, 38 days ahead of the previous record held by Tropical Storm 21 of the 1933 season.
Simplified: When Subtropical Storm Vince formed on October 8, it was the earliest ever in the season that the twenty-first tropical or subtropical storm had developed, 38 days ahead of the previous record held by Tropical Storm 21 from 1933.