Subtropical Storm Alberto in late May was the first storm of the season that formed on May 25. This was the fourth consecutive season in which storms form before the official start of the hurricane season. Beryl became the first hurricane of the season in early July. Florence became the first major hurricane of the season on September 5. Michael became the second major hurricane of the season on October 9, and a day later, it became the third-most intense hurricane to make landfall in the United States in terms of pressure, behind the 1935 Labor Day hurricane and Hurricane Camille of 1969. As Michael became a Category 5, 2018 became a third consecutive season to feature at least one Category 5 hurricane (Matthew in 2016; Irma and Maria in 2017). This season is the first on record to see seven storms that were subtropical at some point in their lifetimes (Alberto, Beryl, Debby, Ernesto, Joyce, Leslie, and Oscar). The season ended with Hurricane Oscar on October 31.