In order to resolve flow features in downslope accelerated winds we run the WRF model in it's LES mode, i.e. resolving the largest boundary layer eddies. Computations at these resolutions are too expensive for operational use. Hence the required model resolution to provide useful information about wind exceeding specified thresholds in the gusts called pulsations is investigated. These quasi periodic large amplitude wind speed fluctuations present a particular challenge for wind power estimation and forecasting. The speed throughout the periods can be within the design specifications and only the energy production will fluctuate, or the speed can occasionally exceed the design specifications and the wind turbines will shut down thus causing production loss. In the worst case the sudden wind change will inflict damage to the wind turbines. We are presenting the newest findings regarding microscale dynamics of such downslope winds and site-specific methods for diagnosing their occurrence from the larger scale models.