 News Talk 790 WNIS News Time 506. Here's your National Weather Service forecast. A heat advisory in effect from 11 a.m. to 6 p.m. today. For today, partly sunny with showers and thunderstorms likely in the afternoon. Highs around 90. Southwest winds at 10 miles per hour with gusts up to 20. Heat index up to 107. For tonight, cloudy with showers and thunderstorms. Lows around 70. It's 74 in Norfolk, 76 on the peninsula, 78 in the Outer Banks.