Abstract
Coping with uncertainty in dynamical systems has recently received some attention in artificial intelligence, particularly in qualitative and model based reasoning. In this paper, as a case study of uncertain or fuzzy dynamical system, we have proposed a fuzzy dynamical system modelling of a disturbance created by winds coming from different directions and colliding to give rise to a vortex under certain conditions. Under favourable conditions this vortex may lead to the development of a cyclonic storm (cyclogenesis).