Holy crap! There was a tornado in the Tidal Basin yesterday, and the rest of the weekend promises to bring another deluge. Nevertheless, we’ve got some recommendations to keep you dry and having fun. FRIDAY: >> Talented local artrockers Metropolitan hosts a record release party at the Black Cat for their third CD, “The Lines They Get Broken.” Aqueduct and Federal City Five open. 9:30, $8. >> The Brindley Brothers, local musicians and owners of…