September 12, 2011 5:10 pm NBC Chi WX 091211 Afternoon A weak cold front passes through the area, bringing some clouds and cooler temperatures. Local 5:02 Dismissed: Chicago's sex crime conviction rate among worst of major U.S. cities 2:23 City Winery employee fatally stabbed by co-worker shortly before Danny Boy performance 1:56 Bartlett High School halts yearbook distribution due to photo with ‘contentious rhetoric' 6:31 NBC 5 Nightly Update: Wednesday, May 22 2:01 Wednesday evening forecast: Calm conditions expected