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Home / Science / Tides of the King: Hurricane Dorian hits the worst time for storm surges

Tides of the King: Hurricane Dorian hits the worst time for storm surges




Weston Rice drives over a flooded parking lot as he prepares to launch his jet ski on August 30, 2019 at Haulover Marine Center, Miami Beach, Florida. The flood was due to a flood of the king. (Joe Raedle / Getty Images)

Timing is everything.

Hurricane Dorian is expected to approach the Florida coast as a major category 4 storm as he applies the brakes and may stop for a while near the coast. This will maximize the potential storm surge hazard of the storm in a state where the risks associated with sea level rise are already at zero. Storm surges, which are the storm-induced rise of water over normally dry land on the coast, occur at high tide levels.

Flooding caused by storm surges can flood communities as seawater flows into homes and businesses and sometimes over roads climbs 10 or more feet.

In addition to the storm surge, this weekend weekend floods will be at their highest levels of the year until the beginning of next week, as the Earth, Sun and Moon are aligned, resulting in a gravitational pull on the ocean.

"King Tide" is not scientifically defined, but a term that describes exceptionally high tides. With sea-level rise due to man-made global warming and sinking, coastal areas are more susceptible to flooding during the flood season. In Florida, for example, low-lying areas of Miami regularly flood with exceptionally high tides.

For more than a week this summer, Miami set flood records every day for the period between the end of July and the beginning of August. The neighborhoods were flooded and some roads were turned into rivers.

A hurricane moving east to west to Florida would trigger a life-threatening storm surge in every season. Historically deadly threat to its arsenal.

For example, in Miami, Melbourne (Port Canaveral), Jacksonville, Savannah, and Charleston, each of which could be a storm surge from Dorian, the tide will rise above the normally dry ground by Tuesday or Wednesday. In Miami, for example, the afternoon tide on Monday seems to bring 0.55 feet of water over the normally dry ground, unaffected by the hurricane. However, having water above normal dry soil is not synonymous with flooding.

Miami, for example, starts flooding 16 inches above normal dry soil. With the rise in sea level during this period, the frequency of Miami floods has increased 3.2-fold. This flood occurs storm-free, even on sunny days with a light wind.

Add a hurricane to the mix, and it's a recipe for a potential disaster.

In Port Canaveral, the tide Tuesday morning is forecast to be 0.67 feet above the normally dry ground, without considering the impact of the storm, which could add 10 to 15 feet or more of water to this background flood level, depending on its trail Storm hits at high tide. In Savannah, a moderate flood begins at 2.13 feet above the normally dry ground, and the King Tides may partially bring the ocean there when Dorian moves in that direction.

Coastal flood warnings for the coastal areas of Georgia and South Carolina were on Friday evening there were floods in recent days due to the flood and flood.

Sea level rise combined with King Tides makes it easier for storm surges to do more damage, much like a basketball game on a field where ground levels are gradually increasing, much more Bang would cause dunks than usual.

Sea level rise is forcing Miami and other coastal communities in Florida to routinely face increased flooding. They spend millions on infrastructure projects and make the city particularly susceptible to storm surges.

"In the Miami area, sea levels have risen by 5 inches since the mid-1990s, and although that does not sound like much to humans, it's a big deal in a dwelling town just a few feet above sea level." says Capital Weather Gang. The tropical weather awaits Brian McNoldy. "The frequency of flooding due to" sunny days "has increased, and when it comes to hurricanes, the base for storm surges increases. Places that could have prevented water damage a few decades ago now have water on their streets or in their homes, and places that have been flooded before are now flooded even worse. "

Since 1900, the city has a cumulative sea-level rise of 0.92 feet, according to Climate Central, a research and journalism group that has comprehensively mapped the coastal susceptibility to sea-level rise.

In Charleston, Hurricane Dorian, the combination of land booms, could get in the way of change and sea-level rise since 1900, leading to a 1.26-foot sea-level rise.

"As the average sea level serves as a platform, even a slight increase in sea level can significantly increase the frequency and extent of tidal floods and storm surges," said Maya Buchanan, a climatic seawater rise scientist at Climate Central.

From Friday Many computer models showed a worst-case scenario for storm surges along Florida's east coast, especially along the Space Coast, where a slower hurricane approached the shore at a vertical angle, driving a wave from east to west north of the storm center before hitting the Storm to the north and the winds on land up the coast and inward-turned neighboring states.

This would give the southeast coast a longer period of onshore winds, especially in North Florida and on the Georgia and South Carolina shores, as the ship progresses Event leads to ever higher flood rates will become.


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