>> There’s a great, free Caribbean-themed outdoor concert tonight on the Kennedy Center’s South Plaza Stage from 5:30 to 9 p.m.: Wyclef Jean, Shaggy, Jamaica’s The Ska-talites, and Richmond’s jazz-funk outfit Plunky & Oneness. The show will go on rain or shine. Bring lawn chairs and blankets. >> Assuming the predicted thunderstorms late tonight don’t block the view completely, you might want to dust off that telescope and see if you can spot the…