What level of development of a tropical cyclone has a hundred mile radius of circulation, gale force winds, less than 990 millibars of pressure and vertically formed cumulonimbus clouds?

Correct Answer: Option A — A tropical storm

A tropical storm is defined as a tropical cyclone featuring organized circulation, gale-force winds (34-63 knots), central pressures dropping below 990 millibars, and deep convective cumulonimbus cloud structures spanning a broad circulation radius.