...It has a decent chance to become one of the few (sub)tropical cyclones forming after Oct 20 to last 10+ days *in the subtropics*. Last one was Olga 2001. There are more such cases from Sep to mid-Oct, most recently Leslie 2018, Nadine 2016, Epsilon 2005, Kate 2003, Kyle 2002

— Yaakov Cantor (@yconsor) November 3, 2021