 News Talk 790, WNIS News Time, 506. Here's your National Weather Service forecast. An excessive heat warning remains in effect from 11 a.m. to 8 p.m. For today, mostly sunny with highs in the upper 90s, southwest winds at 10 to 15, heat index up to 110. For tonight, partly cloudy with a chance of showers and thunderstorms, lows in the upper 70s, southwest winds at 10 to 15.