Refer to figure.

TROPICAL REVOLVING STORMS (TRS). Are thermal depressions that develop over warm tropical oceans (wind speeds in excess of 33 kts). When they sustain wind speeds greater than 63 kt, they are designated tropical cyclones. TRS generate their power and energy from the release of large amounts of latent heat from moisture they have gained over the warm seas.
THE EYE is found in the centre of the storm and, typically, has a diameter of 30-50 km (10-20 NM). Within the eye, the lowest surface pressures and calmest conditions are found. It can be well seen by weather satellites (as you can observe in the attached figure)

Note: TRS will NOT form:

• over land (it is too dry)
• over the South Atlantic or South-East Pacific (sea surface temperatures are too cold)