 WNIS Newstime 1005. The National Weather Service calling for mostly sunny skies today. High near 91. Heat index up to 101. Slight chance of showers and thunderstorms headed into the afternoon. Tonight partly cloudy. Low around 76. High temperatures for tomorrow as well. Mostly sunny with a high near 98. Heat index up to 109. Southwest winds at 5 to 10 mph. Monday night mostly clear. Low around 79.