 Charge into Genesis of Rockville in Gaithersburg at fitsmall.com. I'm Butch Seltzer, WTOP traffic. Seven News First Alert meteorologist Mark Pena. Very warm and muggy conditions to start this Sunday with mostly cloudy skies and temperatures in the low to mid 70s. Now as we head towards this afternoon, a bit of an active weather day. We've got another hot afternoon in store with highs in the mid 90s with heat index values making it feel anywhere from 100 to 105 degrees.