weather forecast September 13, 2021 12:03 am NBC10 First Alert Weather: Sunny Start and Stormy Ending to the Week We’re in for a sunny start but a stormy end to the week. NBC10 First Alert Weather meteorologist Steve Sosna has the forecast. US & World Videos 2:50 One more cool day, then warmer weather ahead 3:15 Cold night, then a big warmup this weekend 3:05 Temperatures to heat up over the weekend 2:05 Warming into the 80s by weekend's end 2:09 Big weekend warm-up expected