 Mostly clear skies expected overnight and mild and muggy conditions as well as lows dip into the mid-70s. Now your Monday will feature a bit of a one-two punch. It'll be hot. Highs near 100 degrees with heat index values closer to 110. And also a chance at some afternoon showers and storms, some of which could be strong to severe. I'm 7 News meteorologist Mark Pena in the First Alert Weather Center. And right now we've got 81 degrees in Manassas, it's 82 in Frederick, and we've got 83 degrees outside the WTOP studios at 1159.