Local data is essential to understand the effectiveness of weather prediction and early-warning system. Citizen science plays a potential role in filling gaps through contributing local data and providing authorities and scientists with additional observations and ground truth to assess warnings. The term – citizen science can be defined as the type of science in which the public can participate in producing scientific knowledge in collaboration with professional scientists and scientific institutions. Co-creation of knowledge, credibility, the quality of scientific evidence and decision making requires to be clarified for enhancing the evaluation of the effectiveness of early-warning systems and understanding the power struggle between public and professionals in the decision-making process.