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A perigean spring tide is a tide that occurs three or four times per year when a perigee (the point nearest Earth reached by the Moon during its 27.3-day elliptic orbit) coincides with a spring tide (when the Sun, the Moon, and Earth are nearly aligned every two weeks). [1]
Larger tidal range occur during spring tides (spring range), when the gravitational forces of both the Moon and Sun are aligned (at syzygy), reinforcing each other in the same direction or in opposite directions . The largest annual tidal range can be expected around the time of the equinox if it coincides with a spring tide.
Mean high water springs (MHWS) – The average of the two high tides on the days of spring tides. Mean high water neaps (MHWN) – The average of the two high tides on the days of neap tides. Mean sea level (MSL) – This is the average sea level. The MSL is constant for any location over a long period.
In South Florida, that happens in the fall, and to a lesser extent in the spring. During that window, the tides are all a little higher. But during a full or new moon, the tides are even higher. ...
During a supermoon, the factors that drive a perigean tide and a spring tide are at play at the same time. Still, this concurrence only amounts to a 5 cm (or 2 inch) greater variation in spring ...
A king tide is an especially high spring tide, especially the perigean spring tides which occur three or four times a year. King tide is not a scientific term, nor is it used in a scientific context. The expression originated in Australia, New Zealand and other Pacific nations to describe especially high tides that occur a few times per year ...
The dates of spring tides and neap tides, approximately seven days apart, can be determined by the heights of the tides on the classic tide tables: a small range indicates neaps and large indicates springs. This cycle of tides is linked to the phases of the moon, with the highest tides (spring tides) occurring near full moon and new moon.
The dates king tides are likely to occur for the rest of the season are: Sept. 26 - Oct. 4 (full moon) Oct. 14 - Oct. 19 (new moon) Oct. 24 - Nov. 2 (full moon) Nov. 11 - Nov. 17 (new moon)