A tropical cyclone is the generic term for a warm-cored, non-frontal synoptic-scale low-pressure system over tropical or subtropical waters around the world. The systems generally have a well-defined center which is surrounded by deep See more

Each year on average, around 80 to 90 named tropical cyclones form around the world, of which over half develop hurricane-force winds of 65 kn (120 km/h; 75 mph) or more. … See more

Tropical cyclone intensity is based on wind speeds and pressure; relationships between winds and pressure are often used in determining … See more

Eye and center
At the center of a mature tropical cyclone, air sinks rather than rises. For a sufficiently strong storm, air may … See more

Tropical cyclones tend to develop during the summer, but have been noted in nearly every month in most tropical cyclone basins. … See more

Classification
Around the world, tropical cyclones are classified in different ways, based on the location (tropical cyclone basins), the structure of the … See more

The movement of a tropical cyclone (i.e. its "track") is typically approximated as the sum of two terms: "steering" by the background environmental wind and "beta drift". Some tropical cyclones can move across large distances, such as Hurricane John See more