 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. Highs in the mid 90s. Southwest winds around 10 miles per hour with gusts up to 20. Heat index up to 107. It's 81 in Norfolk, 81 on the