HONOLULU -- The recently completed October 2009 through April 2010 Hawaii wet season, or hoolio, ranks as the driest in the past 30 years and one of the driest in the past 55 years, the National Weather Service said. The finding is based on an average of wet season rainfall rankings from seven reporting stations across the state with continuous records. Existing agricultural drought in the eastern half of the state worsened particularly in the Kona, Kau, and leeward Kohala sections of Hawaii Island since the development of an El Nino last summer.