May 12, 2015 7:03 pm NBC10 First Alert Weather: Hottest Day Since September Tuesday was the hottest day since September! But there is a big cool-down expected over the next 24 hours. NBC10 chief meteorologist Glenn “Hurricane” Schwartz has your full 7-day 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