The main points on how a hurricane occurs:

A lot of heat is needed for hurricanes to occur therefore they usually occur over tropical seas.

The warm air rises which creates and area of low pressure.

The air cools after it has risen. This causes towering clouds and intense rainfall.

Air is sucked across the sea into the centre because of the low pressure.

Strong winds spiral upwards due to the earths rotation.

The eye is caused by air rising and preventing air falling apart from in the middle.

General conditions of hurricanes: 75 mph winds | heavy rain | thunder | lightning | moving at 12 mph.