Post date: Dec 7, 2010 7:47:04 AM
Story and photo from Surf Alaska.net surf click.
Turnagain Arm sees the largest tidal range in United States, with a mean of 30 feet (9.2 m), and the fourth highest in the world, behind Bay of Fundy (11.7m), Ungava Bay (9.75m), and Bristol Channel (9.6m).[8] The ocean's natural 12-hour 25-minute tidal cycle is close to Turnagain Arm's natural resonance frequency."