weather forecast September 15, 2021 4:57 pm NBC10 First Alert Weather: Stormy and Cooler Days Ahead After days of hot and humid conditions we’ll end the week with storms and cooler temperatures. NBC10 First Alert Weather meteorologist Brittney Shipp has the forecast. US & World Videos 2:43 Philly is warmer than Miami, Florida, Monday 2:06 Feeling like summer 2:36 A summer preview 2:50 One more cool day, then warmer weather ahead 3:15 Cold night, then a big warmup this weekend