The goal of this study was to demonstrate the capabilities of drone-based monitoring to analyse and visualize forest damages, in this case specifically caused by strong winds. The study area is located in the mountains of the Sintra natural park in Portugal, which during the month of January 2013 suffered the worst storm damages in 50 years with devastating consequences for the forest. Using imagery data acquired within just a few hours using our glider drone, we generated orthofotos and 3D surface models using photogrammetric methods. The examination of these data allowed us a extremely quick assessment of the damages caused by the wind storm. In comparison, a large scale assessment of this type on the ground is highly limited due to the difficult accessibility, low field of vision in the forest and high costs, not to mention the risk of operating within the effected areas after such a storm.