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How do hurricanes weaken and dissipate?

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Hurricanes depend on a continuous supply of moisture from warm ocean water to maintain themselves. If the storm moves over land or cold water it loses this fuel source and weakens. This can also happens of the hurricane moves into a mass of dry air. Additionally, if a hurricane encounters strong wind shear it can be essentially ripped apart.
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A tropical cyclone can cease to have tropical characteristics through several different ways. One such way is if it moves over land, thus depriving it of the warm water it needs to power itself, quickly losing strength. Most strong storms lose their strength very rapidly after landfall and become disorganized areas of low pressure within a day or two, or evolve into extratropical cyclones. While there is a chance a tropical cyclone could regenerate if it managed to get back over open warm water, if it remains over mountains for even a short time, weakening will accelerate. Many storm fatalities occur in mountainous terrain, as the dying storm unleashes torrential rainfall, leading to deadly floods and mudslides, similar to those that happened with Hurricane Mitch in 1998. additionally, dissipation can occur if a storm remains in the same area of ocean for too long, mixing the upper 60 metres (200 ft) of water, dropping sea surface temperatures more than 5 °C (9 °F). Without warm surface water, the storm cannot survive.
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How do hurricanes weaken?

Hurricanes weaken when they are not over warm water or are over cooler water. (You couldn't have a hurricane in an area that is not near warm water). When they come to land th

Where and why did hurricane ike dissipate?

Hurricanes dissipate when they reach land because there is no water  to strengthen them. Hurricane Ike began to dissipate as soon as it  hit land and it dissipated in easter

Why does a hurricane weaken over land?

due to specific heat the air over land will cool quickly causing the hurricane to slow down and weaken. That is also on of the main reasons a hurricane can not form over land.

How do hurricanes dissipate?

Hurricanes dissipate due to lack of water supply, cold water and  stalling. There must be movement for the storm to be a hurricane.