They can form either as a tornadic waterspout, which develops from a supercell thunderstorm, or the more common fair-weather waterspout, which forms in calm conditions without severe storms.

Waterspouts are non-supercell tornadoes that occur over water, the BOM said. If it moves ashore, the waterspout can become a tornado. The BOM said waterspouts can damage boats in the water as its ...

That was the case this afternoon with a supercell (or strong thunderstorm ... However, they typically develop in valleys or as waterspouts off the coast. In today's event, it was the steep ...