A bore tide appears almost on schedule, but intensity varies
A tidal bore occurs when Cook Inlet's flooding tide overwhelms the ebbing waters in Turnagain Arm, a narrow, shallow, sloping basin with an extremely high tidal range. The inlet's 40-foot tide range is the second highest in North America (after Nova Scotia's Bay of Fundy).
A bore tide wave from 6 inches to 6 feet high travels at 10 to 15 miles per hour. Minus tides at full moon and new moon with opposing winds produce the best show. Low tide at Beluga Point comes 75 minutes later than tide table listings for Anchorage.