How Do Hurricanes Form?
1. Tropical Wave
For a hurricane to start, there will first need to be another type of weather anomaly a tropical wave. This is an area of low pressure that will typically cause storms and cloudiness. They generally form toward the west of the tropics and are blown east by the prevailing easterly winds.
A hurricane cannot start without a tropical wave, but not all tropical waves will develop into hurricanes. For a tropical wave to form, there would usually need to be an area of very dry air that is sinking. It is also necessary for there to be little wind shear.
