 Your WDEL Weather Center forecast. A chance of showers and thunderstorms today, mostly between about noon and 2 p.m. That's according to the National Weather Service. Partly sunny today, high around 94 degrees. Heat index is as high as 106. An excessive heat warning, in fact, until 8 tonight. Otherwise tonight, showers and thunderstorms likely, mostly overnight, mostly cloudy, low around 76.