Philadelphia December 11, 2017 11:33 pm NBC10 First Alert Weather: Bitter Cold Moving In Bundle up this week! Dangerously cold wind chills in the single digits will move in. NBC10 First Alert Weather meteorologist Glenn Schwartz has the details. 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