In recent years, extreme weather events have occurred frequently, posing significant threats to the stable operation of power systems. To address these events more effectively, the impact of typhoon weather on distribution networks is analyzed. A method for generating fault scenarios in these networks under typhoon conditions is then introduced. Firstly, the distribution network is gridded, and the Euclidean distance between the typhoon center and the target transmission line is computed. This distance is updated over time to represent the typhoon's movement trajectory. A spatiotemporal evolution model of the typhoon is established. Integrated with the line power flow fault model, this forms a fault model for the overhead lines in the distribution network. Secondly, a multi-island power flow calculation strategy is proposed, in which islands are identified and data is filtered through depth-first search (DFS). This method effectively addresses the critical challenge of maintaining power balance in islanded systems. Finally, fault scenario generation in the distribution network is carried out using the Monte Carlo method. This simulation is based on the established fault model for overhead lines in the network. A fault scenario generation framework is proposed based on the above content. This framework offers valuable insights for future fault prediction and response strategies in power grids under comparable extreme weather conditions.