The eCLOUD sculpture at the San Jose International Airport is inspired by real-time weather in cities around the world. If it is raining in one city, the patterns on the polycarbonate tiles will make the sculpture look like it is raining. If it is windy elsewhere, the patterns will look like they are blowing at the speed and in the direction the wind is blowing in that city. The cloud switches to a new city every 20 seconds.
source: idsa.org