Philadelphia October 23, 2017 5:48 am NBC10 First Alert Weather: Clouds Build NBC10 meteorologist Krystal Klei is tracking building clouds and likely rain in the First Alert Weather forecast. US & World Videos 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 3:04 Seasonable temperatures return to end the week