Terms to know Versión en línea Tornadoes and hurricanes unit third grade. por Sarah Smith 1 Term 1 2 Term 2 3 Term 3 4 Term 4 5 Term 5 Cyclone a large storm system that has heavy rains and rotating winds a sign that a tornado has been offically sighted and is on the ground Warrning Funnel a shape of a cloud that projects from the base of a wall cloud that usually turns into a tornad. Look out, this is a sign that weather conditions are right for a possible storm Watch Tropical Storm is a severe storm that occurs offshore over over warm seas that has the ability to become a hurricane