A National Weather Service number one priority, as stated in the FY07-FY11 Baseline Assessment, is to “Disseminate and deliver NOAA’s information and services.” A wide range of environmental information, in digital form, with the necessary supporting infrastructure, is contained in the NOAA Operational Modeling Archive Distributed System (NOMADS) and the Real Time (RT) component project prototype at the National Centers for Environmental Prediction (NCEP). NOMADS is now delivering on its goal of a seamless framework for serving NOAA’s real time and past data base to value added retailers, public access, and for science and development. As one of many participants of NOMADS, NCEP serves the operational model data base using data application protocol (Open-DAP) and other services. We will show an Open-DAP (also known as DODS) client application that provides a request-and-fulfill mechanism for access to archive and real time records. As an example of the DAP service we show a client application which accesses the Global or Regional Ensemble data set to produce user selected weather element event probabilities. The event probabilities are easily extended over model forecast time to show probability histograms defining the future trend of user selected events.