 News Talk 790, WNIS News Time, 105. Here's your National Weather Service forecast. A heat advisory in effect from 11 a.m. to 6 p.m. Sunday. For the overnight, partly cloudy, lows in the upper 70s, south winds at 10 to 15. Sunday, partly sunny with showers and thunderstorms likely in the afternoon. Highs in the mid-90s, southwest winds around 10 miles per hour with gusts up to 20. Heat index up to 107. It's 85 in Norfolk, 85 on the peninsula.