The record ended when Hurricane Irene formed in late August. Irene also became the first major hurricane (being a category three or higher on the Saffir–Simpson Hurricane Scale). After Irene dissipated, Hurricane Katia became the second major hurricane of the season. With seventeen tropical storms, only four became hurricanes. The following hurricane was Hurricane Rina. Between September 7-9, there were three tropical cyclones active, which were Katia, Maria and Nate. This information made the Climate Prediction Center issue a La Niña Advisory.