A hurricane is a large storm characterised by very strong winds. If a tropical cyclone has winds over 74mph(119km/h) and it forms in the Atlantic Ocean, it is known as a hurricane. There are 5 categories of hurricane numbered 1 to 5. The most severe category 5 hurricanes can have winds up to 200mph(320km/h). The hurricane develops around an area of low pressure(the eye) and the winds rotate in an anti clockwise direction around this point. This is what they look like from space.
A hurricane is specific to the area around the USA. A tropical storm formed in the Indian Ocean is called a cyclone, and one formed in the Western Pacific Ocean is called a typhoon.
For more in depth information on hurricanes, please see the following link:
The science of weather prediction or forecasting is called meteorology. A person who predicts the weather is a meteorologist.
A meteorologist will collect data from a range of sources to show what the current weather conditions are. They then predict what will happen based on what has happened in the past, when the conditions were the same or similar.
Among the type of data collected is air pressure, temperature, wind speed and direction. This data is collected by weather stations which are dotted around the country.