It's been more than an hour since NHC declared Ida made landfall near Port Fourchon, so why isn't it weakening?

Well it hasn't exactly passed over a whole lot of "land" since then, and much of what's normally dry ground here is submerged by feet of storm surge. pic.twitter.com/MaX4HkN5i7

— Jack Sillin 🇺🇦 (@JackSillin) August 29, 2021