Tropical Storm Lane, greatly diminished from the major hurricane it once was, drifted away from the Hawaiian coast on Saturday, but lingering showers threatened to trigger more flooding and landslides. The National Weather Service (NWS) lifted all remaining tropical storm warnings and watch advisories for Hawaii as trade winds finally began to nudge Lane off to the west. But a flash flood watch remained in effect for Oahu, home to the state capital Honolulu and 70 percent of Hawaii’s 1.4 million residents, through Sunday morning, emergency management officials said.