 This WGMD weather report is brought to you by Arby's in Millsboro on Route 113 and Arby's in Lewis on Coastal Highway. Arby's, we have the beats. Here's a look at your Delmarva forecast. A heat advisory begins at 11 a.m. tomorrow and continues until 8 p.m. tomorrow night. Slight chance of thunderstorms tonight, otherwise partly cloudy skies. Lows around 78. Winds out of the south, 8 to 15 miles per hour.