Found this really amazing and relaxing for a end of the day. Enjoy.
The Severn Bore is one of Britain's few truly spectacular natural phenomena. It is a large surge wave that can be seen in the estuary of the River Severn, where the tidal range is the 2nd highest in the world, being as much as 50 feet (approx. 15.4m).
The typical tidal range in the open ocean is about 0.6 meters (2 feet).
Tidal range: it is the difference in height between high and low water and will vary throughout the tidal cycle. The most extreme tidal range will occur around the time of the full or new moons, when gravitational forces of both the Sun and Moon are in phase and acting in the the same direction (new moon), or exactly opposite way (full).
The largest annual tidal range can be expected around the time of the Equinox(that occurs twice a year), if coincidental with a spring tide.
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