 Your WDEL Weather Center forecast. Scattered showers and thunderstorms this afternoon. Sunny today, high near 91 degrees. Heat index is as high as 100. Tonight, patchy fog overnight. Mostly clear, low around 75. Slight chance of showers and thunderstorms tomorrow afternoon. Patchy fog tomorrow morning. Sunny tomorrow, high near 96. Heat index is as high as 102. Slight chance of showers and thunderstorms overnight tomorrow night. Mostly clear, low around 75.