Also known as a hurricane in the northern hemisphere and
a typhoon in the southern hemisphere. A cyclonic storm with wind speeds up to 33 m/s (74 mph) that can be quite devastating.

A tropical cyclone is the generic name for any "non-frontal synoptic scale low-pressure system over tropical or sub-tropical
waters with organized convection (i.e. thunderstorm activity) and definite cyclonic surface wind circulation" according to the FAQ at -- in other words, a storm over certain areas of water that has thunder and the winds going in a circular pattern. The category includes tropical depressions and tropical storms that have not reached hurricane/typhoon strength as well as the strongest ones.

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