Thunderstorms are crated by the cold air rising. When the cold air starts to heat up the energy is released and starts to form a Thunderstorm.
Tornados are formed by Thunderstorms. A Tornado is crated by a Thunderstorm that starts to form into a vortex. A vortex is a mobile that is rotating winds that has a appearance of a funnel-shaped clouds.
Hurricanes are like Tornados but on water and when they get close to land the die out. Hurricanes are formed on like Tornados. When a Hurricane is forming it gets it strength form the tides and waves.