A severe tropical cyclone usually with heavy rains and winds moving at 63-136 knots (12 on the Beaufort scale)
Open English WordNet
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls.
A tropical cyclone of great intensity; any wind reaching a speed of more than 73 miles per hour (117 kilometers per hour) is said to have hurricane force.
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.