it should be titled, waterspout chasing, not tornado chasing
it looks to be a rather weak warter spout, not much affect on the water surface, very fine spray being lifted up
the funnel shows up really well in waterspouts because of all the moisture avaible to create the cloud that is the funnel (the drop in air pressure lowers the temperature.....dew point reached....cloud forms....and so with a waterspout, the cloud forms easily, compared to its cousin, a landspout....