This is interesting. The National Hurricane Center https://www.nhc.noaa.gov/ has issued their last advisory for post tropical cyclone Leslie. This posting also shows that Leslie should strengthen to hurricane strength Thursday morning. At first I thought there was some sort of a huge mistake here. As I read the NHC discussion and a few Google hits I now understand that Leslie will strengthen by a baroclinic process and then quickly die and can't possibly be more than a brief fish storm.
Take a look at the NHC site. It catches your eye and makes you think.