Original: Waterspouts that are not associated with a rotating updraft of a supercell thunderstorm, are known as "non-tornadic" or "fair-weather waterspouts", and are by far the most common type.
Simplified: Waterspouts that are not associated with a rotating updraft of a supercell thunderstorm, are known as "nontornadic" or "fair-weather waterspouts", and are by far the most common type.