First Alert Weather December 31, 2021 6:21 am NBC10 First Alert Weather: Dense Fog Friday Morning Visibility in some spots will be only about a mile as dense fog clouds the Philadelphia region Friday morning. NBC10 First Alert Meteorologist Steve Sosna has your full forecast. US & World Videos 2:53 Up to 8 inches of snow expected in some areas on Monday 2:51 First Alert issued for Monday ahead of big snow storm 3:17 Freezing temperatures this weekend 4:00 Winter weather advisory in place until 10 p.m. Friday as snow falls 3:45 Light snow to impact Friday evening commute, heavier snow to move in on Monday