 Here's a look at your Delmarva forecast. A heat advisory begins at 11 a.m. today and remains in effect until 8 p.m. tonight. Slight chance of thunderstorms today. Otherwise, mainly sunny skies. High temperatures reach up to 99. Southwest early winds, 8 to 15 miles per hour. Partly cloudy tonight. Slight chance of thunderstorms, 78. I'm meteorologist Paul Trombley from the Tock of Delmarva Weather Center along the coast. Right now, 86.