 Your WDEL Weather Center forecast. Patchy fog overnight tonight. Mostly clear. Low around 75 degrees. Tomorrow, a slight chance of afternoon showers and thunderstorms. Patchy fog in the morning. Sunny tomorrow. High near 96. Heat index is as high as 102. Tomorrow night, chance of showers and thunderstorms. A slight one overnight. Mostly clear. Low around 76. Tuesday, sunny and hot. High near 99.