The communication of weather forecasts, weather warnings and their uncertainty will be examined within the framework of the HErZ project WEXICOM, especially with regard to the effectiveness of communication. In addition to various forms of weather forecasts and warnings, we will examine the extent to which the inclusion of citizens in weather observation has a positive effect on the understanding of probability-based weather forecasts and warnings. For this "Citizen Science" gives the opportunity of a direct involvement of citizens in current research projects via the participation in weather observations within the framework of a citizen measurement network. On the one hand, this allows for the possibility of interactively conveying and evaluating knowledge. On the other hand, it helps to support the professional measurement network by a large number of participants, which could not be achieved by a limited team of scientists. Thus, citizens actively contribute to research through the monitoring network and help to improve it. In addition, we expect findings on how to communicate probability-based weather forecasts and warnings as well as other scientific results of the measurement campaign to the population.