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Causes. There are two main factors that are responsible for causing hurricane storms, viz. warm water and moist, warm air. This is the reason why they begin in tropical regions. They occur when the moist, warm air from the surface of the ocean rises and meets the cooler air.
The reason why more hurricanes form in the Northern Hemisphere is that the conditions favorable to hurricane development are more prevalent in the Northern Hemisphere than the Southern Hemisphere. These conditions include: warm ocean water and low wind shear.es, there are generally more hurricanes in the northern hemisphere than in the south.There are a few reasons for this: Hurricanes need 3 main ingredients in order to form: warm ocean water, low air pressure, and low wind shear.