waterspout

noun4

1. •
   A whirlwind that forms over water, not associated with a mesocyclone of a thunderstorm (contrary to a true tornado).
2. •
   A true tornado that passes over a body of water.
3. •
   A channel through which water is discharged, especially from the gutters of a roof; downspout; drainpipe.
4. •
   A plume of water rising from the surface of a body of water as the result of an explosion or impact.