The winner is the 1893 Charleston hurricane at 8.25 days (it was a major 'cane over the central Atlantic well before hitting SC)! After that, it's not even close- third place goes to a few 'canes at 3.25 days. Sam is forecast by NHC to hang on as a major hurricane another ~3 days

— Yaakov Cantor (@yconsor) September 29, 2021