Let us start by describing what the whole structure looks like. A hurricane appears to be a giant whirling mass of clouds, with a nice donut-shaped hole or depression in the center. The outer edges can have a ragged, spiral-arm appearance as the storm spins, counter-clockwise in the northern hemisphere. A hurricane is a huge collection of thunderstorms that have their origins off the west coast of Africa. They are born over humid tropical waters in the Atlantic Ocean, and migrate towards the North American continent. Once the storm makes landfall, it loses its source of power, warm ocean water, and starts to weaken. The cloud cover can be sketch on the outer bands of the hurricane, ranging to thick, dense cloud cover in the strongest part of the rain bands. The center, or "eye" of the hurricane is composed of a low pressure area of relative calm, with little cloud cover at all.