How are tornadoes formed?
Tornadoes form from quickly rising warm air within a thunder cloud. The rising wind hits  cold air that is moving in different directions, and starts to rotate. When the rising, rotating air keeps moving faster, the column of air grows larger and longer, and can reach to the ground. The rotating air moves so fast that it makes a grumbling noise. Tornadoes are formed by severe thunder storms.

What is a waterspout?A waterspout is a weak tornado that forms over water. They are most likely to occur near the Gulf coast. Waterspouts can sometimes move inland making tornadoes causing damage and enjures.

Types of tornadoes 
There can be diffrent types of tornadoes wich can be big and small and can form in different locations. They can range in shapes from a narrow and rope like shape to a  fat cylinder, or they could be cone or wedge-shapd.

Effects on land and people 

A tornado can cause serious problems like you might die or get hurt in (someway) E.G someone might break there arm from a brick falling on there arm. Tornadoes can also blow down houses and leave people with no shelter.