 WNIS Newstime 805. The National Weather Service calling for mostly cloudy skies rest of the night with a low around 76. Slight chance of showers and thunderstorms heading into the overnight. A heat advisory in effect tomorrow from 11 a.m. to 8 p.m. expecting mostly sunny skies high near 96. Heat index up to 109. For Friday night, partly cloudy with a chance of showers and thunderstorms low around 78. Currently 87 on the south side, 87 on the peninsula, and 80 in the outer banks of North Carolina.