We are happy that our tutorial submission entitled “Interactive Visual Analysis of Scientific Data” has been accepted as a half-day tutorial for VisWeek 2013. The tutorial is a collaborative effort of Helwig Hauser from the University of Bergen, Norway, Johannes Kehrer from the Vienna University of Technology, Austria, and Steffen Oeltze (organizer). The tutorial has been held once before at VisWeek 2012. This year, the tutorial has been significantly changed, e.g., to present new application fields of Interactive Visual Analysis (IVA) to the audience: IVA of epidemiological and flow data.