So if one location only saw on average two high tide flooding days in 2000, they could now be experiencing 10 to 24 days of flooding. This means that the southeastern coast and Gulf Coast saw five to 12 times as many high tide flooding days than they saw just 20 years ago, according to Brink. Southeast Atlantic and Gulf Coast regions saw an increase of over 400 to 1,100 percent, respectively, in high tide flooding days compared to the year 2000,” according to NOAA. While this might not sound like a lot it adds up over time, and the higher the sea level is the higher the tides will be and the more coastal flooding, Brink said. South Florida is seeing the sea level rise between 2 to 4 mm per year, according to the National Oceanic and Atmospheric Association (NOAA). King Tides: The tidal phenomenon that could make Dorian's impact even worse However, sea-level rise is causing these tides to happen more frequently, to last longer and extend further inland than in the past.” Officials in Miami-Dade County say “more severe flooding may result if King Tides coincide with bad weather conditions such as heavy rains, strong winds or big waves.
#EXSPECTED TIDAL SURGE FROM CINDY FULL#
Monroe County, which includes Everglades National Park and the Florida Keys, and neighboring Miami-Dade County will both be affected by the King Tides, a term used to describe exceptionally higher than normal tidal cycles that typically occur during a new moon or a full moon when the moon makes its closest pass to the Earth, according to CNN meteorologist Haley Brink.ĭuring a King Tide, coastal flooding can occur even on nice weather days when there is no rain, Brink said, which is why King Tides can also be referred to as “sunny-day flooding” or “nuisance flooding.” The shape of the coast in that region – known as Florida’s Big Bend area, where the northern part of the state’s peninsula meets the panhandle – is also curved inward, which can focus the storm surge to make it even more dangerous, he said.Parts of South Florida will experience higher than normal seasonal tides, potentially causing coastal flooding periodically through December, according to officials in two counties. The continental shelf extends so far out from the coast and has a gradual slope, allowing the ocean to grow higher as hurricane winds drive the water on to land, Tang said. The part of north-west Florida that has been hit by Idalia is especially vulnerable to storm surge because of the region’s geography. “There’s a saying that you hide from the wind and run from the water, and hopefully people are heeding that advice,” said Brian Tang, associate professor of atmospheric science at University at Albany in New York. The storm surge is often the greatest killer when hurricanes strike. The moon’s gravitational pulls are even stronger when it is closer to Earth, so the tides are even higher. When the moon is full, the sun and the moon are pulling in the same direction, which has the effect of increasing tides above normal ranges, said Kerry Emanuel, professor emeritus of atmospheric science at the Massachusetts Institute of Technology. It is expected to make tidal flooding worse not only in Florida, but in states such as Georgia and South Carolina, where Haines’s office has been warning residents that parts of Charleston could be under water by Wednesday night.
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