Noun
(in the broad sense) a rapidly rotating storm system characterized by a low-pressure center, strong winds, and a circular/spiral arrangement of thunderstorms that produce heavy rain, ranging in increasing strength from tropical depressions and tropical storm to hurricanes.
(in the narrow sense) typhoon, hurricane
Source: en.wiktionary.orgA tropical cyclone can become extratropical as it moves toward higher latitudes if its energy source changes from heat released by condensation to differences in temperature between air masses. Source: Internet
In fact, the National Hurricane Center has given this system, they call it, a 70% probability of becoming a tropical cyclone over the next five days. Source: Internet
Have humans already caused a detectable increase in Atlantic hurricane activity or global tropical cyclone activity? Source: Internet
He said MET is closely monitoring weather developments over the country including in South West Indian Ocean and in Mozambique Channel where tropical cyclone formation can occur. Source: Internet
A system near the Yucatan peninsula has a 80-percent chance of developing into a tropical cyclone or subtropical system in the next five days as environmental conditions become more conducive for development. Source: Internet
A tropical cyclone alert is now in force for Niuatoputapu and Vava'u, as Tropical Cyclone Ula (Category 1) is currently moving south-southwest across the north of Tonga and expected to bring strong and gusty winds to the groups over the next two days. Source: Internet