We get those a lot in the U.S.

Here is one behind our marina dock in Marathon:

 

Dramatic shots!!

 

Looks like Lake Garda?

 

I've often wondered how powerful one of those is. With all the water in them they must be heavy - does that make them more destructive than tornadoes or does it slow them down or what? What would it do to a sailboat hit by one?

Anybody know?

 

Anybody want to find out??

 

I would guess an F0 at most, but usually a very narrow path.