 Heading into the weekend, the heat will remain at bay. Still mid to upper 80s on Saturday, near 90s Sunday. Just an isolated storm chance on Saturday afternoon. I'm 70s meteorologist Ryan Van Der Graaf in the First Alert Weather Center. All right, 73 right now in Gaithersburg and Arlington. 74 degrees in Lanham. The forecast is brought to you by Dulles Glass. For all your glass, mirror, and shower door needs, visit dullesglass.com. Dulles Glass, love your glass. And coming up... Mic check one, two. A new documentary explores the hidden history of hip-hop. I'm Jason Fraley.