weather forecast September 19, 2021 6:29 pm NBC10 First Alert Weather: Cooler Week Ahead We’re in for cooler conditions this week. NBC10 First Alert Weather meteorologist Steve Sosna has the forecast. US & World Videos 2:36 Gloomy weather sticks around for Sunday's Broad Street Run 2:44 Cloudy, chance for rain this weekend 2:41 The weekend kicks off with mostly cloudy skies and passing showers 2:31 Back to cooler temperatures 2:36 Back to spring temperatures