 The 2015 Atlantic hurricane season was a slightly below average season that produced twelve tropical cyclones , eleven named storms , four hurricanes , and two major hurricanes . It officially began on June 1 , 2015 , and ended on November 30 , 2015 . These dates historically describe the period each year when most tropical cyclones form in the Atlantic basin . However , the first named storm , Ana , developed on May 8 , nearly a month before the official start of the season , the first pre @-@ season cyclone since Beryl in 2012 and the earliest since Ana in 2003 . The season concluded with Kate transitioning into an extratropical cyclone on November 11 , almost three weeks before the official end . 
