September 4, 2012 6:08 pm Afternoon Weather Update: Monday Sept. 4, 2012 NBC4’s Fritz Coleman says there’s a 20 to 30 percent chance of storms throughout Southern California this week and explains why a late summer storm is in the forecast. US & World Videos 3:18 USC's commencement preparation includes increased security patrol 1:56 1 person killed after car crashes into South LA church 3:30 Protest on USC campus continues ahead of graduation 0:43 LA County releases sterile mosquitoes as warmer weather nears 2:42 Days before USC commencement, protesters still camped out on campus