Team Logo. The Portland Thunder were a team in the World Football League. They are not to be confused with the Portland Thunder, formerly of the Arena Football League. The team folded along with the league in 1975. Retrieved from "https://prosportsteams.fandom.com/wiki/Portland_Thunder_(WFL)?oldid=16992" Categories: World Football League Teams Teams in Oregon Teams in Portland (OR) Community content is available under CC-BY-SA unless otherwise noted.