Driving across West Texas, it’s impossible to ignore the multitude of wind turbines that dominate the horizon. Those turbines have gone from a few scattered units to thousands that are as much of the landscape of this part of the state as the Llano Estacado escarpment.
But what one might not notice when coming close to the wind turbines is the wake they produce through the air. Unlike an ordinary oscillating fan that produces a compact wake that is easily detectible, the wake of a wind turbine is not as obvious.
Read more - http://today.ttu.edu/posts/2016/01/westergaard-lidar