Hurricane Formation and Decay
Hurricanes form over tropical waters (between 8° and 20° latitude) in areas of high humidity, light winds, and warm sea surface temperatures
(typically 26.5°C [80°F] or greater). These conditions usually prevail in the summer and early fall months of the tropical North Atlantic and North
Pacific Oceans and for this reason, hurricane "season" in the northern hemisphere runs from June through November.
Hurricanes need a lot of energy and they get the energy from the ocean. The warm water and warm air near the surface help to cause hurricanes to form.
Once they form, hurricanes take energy from the water to get stronger. While a hurricane is over warm water it will continue to grow. If it travels
over land it will start to weaken and eventually end. This is why mainly coastal areas are affected by hurricanes.
First, the ocean water should be above 80 degrees Fahrenheit, which provides for the proper amount of water to evaporate. The warm water should also
be a couple hundred feet deep because storms stir up the water, bringing some colder water to the surface.
Next, the winds need to come together at the surface, almost like colliding into each other. The air needs to be unstable so that these colliding
winds will rise, like in a chimney.
The air several thousand feet up needs to be humid. This humidity, vapor, will supply a lot of the energy needed for the storm's development. The
upper level winds should be traveling in the same direction and close together so that they do not tear up the upper level clouds of the storm.
Hurricanes are formed from simple complexes of thunderstorms. However, these thunderstorms can only grow to hurricane strength with cooperation from
both the ocean and the atmosphere. First of all, the ocean water itself must be warmer than 26.5 degrees Celsius (81°F). The heat and moisture from
this warm water is ultimately the source of energy for hurricanes. Hurricanes will weaken rapidly when they travel over land or colder ocean waters --
locations with insufficient heat and/or moisture.
But I guess you know better than all these people, INCLUDING NASA huh?