A tidal bore, [1] often simply given as bore in context, is a tidal phenomenon in which the leading edge of the incoming tide forms a wave (or waves) of water that travels up a river or narrow bay, reversing the direction of the river or bay's current.

A tidal bore is a tidal phenomenon in which the leading edge of the incoming tide forms a standing wave of water that travels upstream, against the current of a river or narrow bay. The word bore derives through Old English from the Old Norse word bara, meaning a wave or swell.

tidal bore, body of water that, during exceptionally high sea tides, rushes up some rivers and estuaries near a coast where there is a large tidal range and the incoming tide is confined to a narrow channel.

Oct 19, 2023 · A tidal bore is a rare natural phenomenon occurring on several rivers emptying into the Bay of Fundy, between the Canadian provinces of New Brunswick and Nova Scotia.

Oct 25, 2018 · A tidal bore is a natural tidal phenomenon in which the edge of an incoming tide travels up a river by forming a wave that moves in the opposite direction of the river's flow.

Turnagain's back-tracking waves are a well-known example of bore tides, also known as "tidal bores" or just "bores." While this phenomenon has been seen at numerous locales around the world, it requires a very specific set of conditions.

Feb 8, 2025 · In essence, tidal currents are the horizontal movements of water that accompany the rise and fall of the tide, whereas a tidal bore is a powerful wave that surges upstream against the normal flow of a river during an incoming tide.

Feb 15, 2025 · Yes, tidal bores do exist in the United States, though they are not as widespread or dramatic as in some other parts of the world. The most notable location in the U.S. for experiencing a tidal bore is the Cook Inlet in Alaska, specifically along the Turnagain Arm.

Tidal bores occur during flood tides when the tide is flowing towards land, often upstream. To an observer on the bank, an approaching tidal bore looks like a turbulent wave or “wall” of water that suddenly raises the water level.

Jan 1, 2016 · A tidal bore is a positive surge of tidal origin that may occur in an estuary when the tidal flow turns to rising; the existence of a tidal bore is linked with a large tidal range, an estuarine bathymetry that amplifies the tidal wave and a low freshwater level.