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Confidence votes 95.7K. A sand tornado is not truly a tornado. It is a phenomenon called a dust devil. Dust devils are whirlwinds that form when a layer of hot air forms just above the ground and rises in a relatively small, rotating column, picking up up dust or sand as it does so. Dust devils are rarely strong enough to cause damage, and are much weaker than tornadoes.
This type of tornado is formed above the surface of water. There are two types of waterspout tornadoes-tornadic and non-tornadic or fair-weather. Tornadic waterspouts are mesocyclonic tornadoes that are formed over the surface of water.ype 1 tornadoes form from the mesocyclone of a thunderstorm, usually a supercell. These tornadoes usually â¦ have winds under 110 mph, but in some cases winds can exceed 300 mph. Type 2 tornadoes, which include landspouts and most waterspouts are weaker.