San Francisco Bay is a large body of water and you can get some interesting weather effects that will develop. I was down by the bay when the wind was whipping around. It was causing some little columns of spray to form out in the open water. Rather than a real waterspout, they were more like a dust devil – just water instead of dust! They would form up and then disappear. However, it would not be long before a replacement would form. These are funny looking effects and it would have been nice to be a bit closer to see them in more detail.