Cyclone refers to any spinning storm that rotates around a low-pressure center. The low-pressure center is also referred to as the 'eye' of the storm, which is well known for being eerily calm compared with the areas under the spinning 'arms' of the storm. You could say that the eye is watching what's going on down below, so it needs a clear path, but the arms are where all the action happens because this is where the storm is throwing out all of its rain and wind                                                                  The main source of energy for tropical cyclones is the warm oceans in the tropical regions. To initiate a tropical cyclone the sea-surface temperature generally needs to be above 26.5°C. However, existing cyclones often persist as they move over cooler waters..
The chain of events ends with a formation of a very high speed winds revolving around it  it is the weather condition that we call a cyclone cyclones are very destructive strong winds push water towards the shore even if the storm is hundreds of kilometres away .these are the first indications of an approching cyclone the low pressure in the eye lifts water surface in the centre the rising water may be as high 3-12 metres it appears like a water wall moving towards the shore continuos heavy rainfall may further worsen the flood situation high speed winds accompanying a cyclone can damage houses ,telephone  trees etc ., causing tremenduos loss of life and property a cyclone is know by different names in different parts of the world it is called a hurricane in the american contient  in philippines and it is called a typhoon