Here is an interactive version: https://anvaka.github.io/noisylines/
When you see a wind map (something like this http://hint.fm/wind/ ) - it shows how wind flows at each point on the map.
The animation above is kind of similar. But the flow of the wind is generated randomly according to perlin noise algorithm, and the wind lines do not ever vanish, but keep going until they hit the bounds of the canvas.
Click here to open external link