This document validates the WindSight mesoscale wind modeling system. WindSight uses the WRF model to downscale global weather data and simulate wind conditions without pre-calculated data. Validation against measurements at 34 European sites found average errors below 1 m/s for 80% of sites. Wind roses and histograms also showed good agreement. The results prove WindSight useful for early-stage wind resource assessment and energy estimation when local data is limited.