There have been more named storms in the Atlantic in 2020 than ever before at this stage in the season, according to Guy Carpenter.
Hurricane Hanna is the eighth named storm, and first hurricane, of the 2020 Atlantic season. It made landfall in South Texas on July 25 as a category one hurricane. That put this season one storm ahead of the hyperactive 2005 season.
Media reports indicate considerable impacts due to inland flooding, with some reports of property damage due to wind and seawater inundation, Guy Carpenter noted in a CAT-i bulletin.
It was the first landfalling hurricane during the COVID-19 pandemic, with reports of overcrowding in designated shelters.
Hanna reached hurricane strength 15 hours prior to making landfall. While northerly wind shear impacted Hanna in the central Gulf of Mexico, shear decreased while Hanna tracked over sea surface temperatures of 28C -29C, warm enough to intensify quickly prior to landfall.
Tropical storm force winds extended to 90 miles as Hanna made landfall, before moving inland across south Texas and far northern Mexico. Hurricane force wind gusts were observed in Port Mansfield at 87 mph, while storm surge levels reached 3-4 feet above average south of Corpus Christi in Matagorda Bay and Port Lavaca.
The largest impact from Hanna was the torrential rainfall as the storm dissipated inland, with totals in excess of 10 inches in both Texas and the Mexico state of Nuevo Leon.
Guy Carpenter, Hurricane Hanna