Start, development and ultimate end of bora wind were largely unknown until recent times. Most of the 20th century thermal forcing on a mountain side was the leading explanation. In 80s, with the introduction of airborne measurements in relevant areas, a breakthrough in the understanding of bora basic dynamics was achieved. In this thesis Large-eddy simulation (LES) [4] of the particular bora case validates current understanding of the matter. Bora is, vertically, nonlocal wind above and down the mountain slope. Its characteristic turbulent nature is due to asymmetric sloping, deforming, overturning, and in extreme cases, breaking of the mountain waves. In this thesis, we have compared measurements of bora wind dated 12/30/2015 with Large-eddy simulation (LES) of the same case located near Maslenica (South of the mountain of Velebit range, northern Dalmatia, Croatia). The simulated terrain had width and height of 66 km and 33 km with the vertical dimension of 10 km. Horizontal resolution in the simulation was 32 m with varying vertical resolution of 1 m at the bottom to 100 m at the top of the domain. At the moment, our results are the first successful meteorological LES results of Croatian bora wind published publicly. A simulation which we used and modified is made on the basis of Duch open source LES model (”microhh 1.0”). We have noticed that the main structural element of bora are big eddies of 100 m and more. Vortices of smaller scale (less than 100 m) no longer contribute significantly to mesoscale air motion. These turbulent eddies, on average, inevitably cascade all the way to viscous scales. LES model is also validated against 20 hours of in situ measurements (dated 12/30/2015). Agreement of measured and simulated data is tested on wind velocities component-wise, wind speed spectra, wind direction, etc... In all aspects, the LES appears to have high correspondence to measured data.