Thanks to Rob Rolleston for sharing this video with me. It came up through some analysis of the Hint FM Wind Map and, as you can see for yourself, it provides a mesmerising ambient display of local wind patterns, making the invisible visible.

Commissioned by the San Francisco Arts Commission, Windswept is a wind-driven kinetic façade consisting of 612 freely-rotating directional arrows creating a large-scale observational instrument that reveals the complex interactions between the wind and the building. The wind arrows serve as discrete data points indicating the direction of local flow within the larger phenomenon.