Infinite Pillar in the Sky

This is basically a rolling cloud. In theory they are linked to the sea breeze, (Surface of land and water heat up at diverse rates, this produces a force differential across the two surfaces which results in wind flowing inwards towards land.) however you can get them if the situation are right. Where this warmer dry air meets cooler humid air you have condensation resulting in cloud formation. With the land breeze blowing inwards and this constant cycling motion among the warm air rising and cooler air sinking it sets up a rolling motion.