Typhoon form when there is a warm water ,the temperature should be 25.6 degree celcius.it will heat up the warm ocean and the air above it the warm air then rises. As a result in low pressure area . The water vapor condenses and heat is given off .the heat makes the air rise even more. In the sorroundings will keep coming in.the air starts to spin and the typhoon will form.generally the end of the typhoon is northwest