 Don't miss the National Symphony Orchestra performing Beethoven's awe-inspiring Ninth Symphony live at Wolf Trap on Friday, July 12th. Tickets at wolftrap.org. I'm Robert Workman, WTOP Traffic. Hot, humid, and at times stormy for your Saturday and also for your Sunday. The weather this weekend is going to be very different than it was on Friday, feeling a little uncomfortable. And watch yourself out in the heat today.