SNOWPACK is a physical snow cover model. The model not only serves as a valuable research tool, but also runs operationally on a network of high Alpine automatic weather and snow measurement sites. In order to facilitate the operation of SNOWPACK and the interpretation of the results obtained by this model, a user-friendly graphical user interface for snowpack modeling, named SN_GUI, was created. This Java-based and thus platform-independent tool can be operated in two modes, one designed to fulfill the requirements of avalanche warning services (e.g. by providing information about critical layers within the snowpack that are closely related to the avalanche activity), and the other one offering a variety of additional options satisfying the needs of researchers. The user of SN_GUI is graphically guided through the entire process of creating snow cover simulations. The starting point is the efficient creation of input parameter files for SNOWPACK, followed by the launching of SNOWPACK with a variety of parameter settings. Finally, after the successful termination of the run, a number of interactive display options may be used to visualize the model output. Among these are vertical profiles and time profiles for many parameters. Besides other features, SN_GUI allows the use of various color, time and coordinate scales, and the comparison of measured and observed parameters.