Florida braced for Eta as new study finds hurricanes staying stronger for longer
... In a record year for Atlantic hurricanes, the latest news came as a new study showed hurricanes are keeping their staying power longer once they make landfall, spreading more inland destruction.
Warmer ocean waters from climate change are likely making hurricanes lose power more slowly after landfall, because they act as a reserve fuel tank for moisture, the study found.
The new study looked at 71 Atlantic hurricanes with landfalls since 1967. It found that in the 1960s, hurricanes declined two-thirds in wind strength within 17 hours of landfall. But now it generally takes 33 hours for storms to weaken that same degree, according to a study in Wednesday’s journal Nature.
“This is a huge increase,” study author Pinaki Chakraborty, a professor of fluid dynamics at the Okinawa Institute of Science and Technology in Japan. “There’s been a huge slowdown in the decay of hurricanes.”
... The storm first hit Nicaragua as a category four hurricane and killed nearly 70 people from Mexico to Panama, before moving into the Gulf of Mexico early Monday near where the Everglades meet the sea, with maximum sustained winds of 50 mph....
There was nowhere for the water to go across much of south Florida, which had already experienced nearly 14in of rain in October.
As much as 16in of rain damaged one of the state’s largest Covid-19 testing sites, at Miami-Dade county’s Hard Rock Stadium, officials said.
Throughout the pandemic, it has been among the busiest places to get a coronavirus diagnosis. The site was expected to be closed until Wednesday or Thursday.
Eta hit land late Sunday as it blew over Lower Matecumbe, in the middle of the chain of small islands that form the Florida Keys, but the heavily populated areas of Miami-Dade and Broward counties bore the brunt of the fury thus far.
It was the 28th named storm of a busy Atlantic hurricane season, tying the 2005 record for named storms, with the climate crisis driving more and fiercer tempests.
And late Monday, it was followed by the 29th storm – Theta.
The US National Hurricane Center in Miami said Theta broke the record of 28 named storms in 2005....
Meanwhile, the new study published in Nature found that in 2018 Hurricane Florence, which caused $24 billion in damage, took nearly 50 hours to decay by nearly two-thirds after making landfall near Wrightsville Beach, North Carolina, Chakraborty said.
Hurricane Hermine in 2016 took more than three days to lose that much power after hitting Florida’s Apalachee Bay.
As the world warms from human-caused climate change, inland cities like Atlanta should see more damage from future storms that just won’t quit, Chakraborty said....