The rain reached 12 inches ( 305 mm ) in other areas . This made Kenneth tied for the 9th rainiest tropical storm in Hawaii . Peak rainfall totals on Oahu included reports of up to 12 inches ( 305 mm ) , which puts Kenneth in a three-way tie for ninth on Hawaii 's rainiest tropical cyclones list , along with Diana in 1972 and a system dubbed `` B '' from the 1967 season .