The 1998 Atlantic hurricane season was an event in the annual tropical cyclone season in the north Atlantic Ocean. This Atlantic hurricane season saw an above-average number of named tropical storms, and included a single-day record for number of hurricanes simultaneously in progress, with four active on September 25: Georges, Ivan, Jeanne and Karl. The season officially began on June 1, 1998 and ended on November 30, 1998. These dates, adopted by convention, historically describe the period in each year when most tropical systems form. Even so, this season's first storm, Tropical Storm Alex, did not form until July 27, while its last, Hurricane Nicole, dissipated on December 1.