The NHC expects a 10-15 foot storm surge when Idalia makes landfall.
What is a king tide?
The term “king tide” is a term used to describe an especially high tide event. It is not a scientific term.The tides happen when there is an alignment of the gravitational pull between the sun and moon in the Northern Hemisphere, “Twice a year when the Earth, sun and moon line up, when the moon and the sun are at perigee and perihelion, we generally experience the greatest tidal ranges of the year,” according to the Perigee is the point when the moon is closest to the Earth.
During full or new moons average tidal ranges are slightly larger. A new or full moon occurs when the sun, earth and moon are in near alignment. The tides this alignment creates are slightly higher than average tides and are called the “perigean spring tides.”A tropical system pushes water inland in advance of making landfall. If that happens during a perigean spring tide, it pushes an already abnormally high tide, even higher, adding to property damage and coastline erosion.
It could, depending on timing. The king tide is expected between noon and 2 p.m. on Wednesday in the area where the storm is likely to make landfall, according to The National Weather Service.
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