Thanks! It should be helpful. I did not mention that this simulation shuld be simple but the basic phisics laws have to be preserved. What we need to know before implementation is: 1. How to calculate radius of hurricane (and dependences between radius, pressure and water temperature) 2. What calculate first? 3. It is small student project, we have less than 2 weeks that's why we try to avoid such complicated formulas like in article, you have presented. Look at that: http://ww2010.atmos.uiuc.edu/%28Gh%29/guides/mtr/hurr/stages/cane/pswd.rxml We have here simple picture which presents how wind and pressure behave in cyclon. We thought, we could use it to write a simple matematical functions to calculate wind and pressure having a radius. But still we need to relate wind and pressure. If, we have a radius, we will can calculate wind and pressure (but we still have to match a scale, calculate minimal/maximal wind and pressure). Basic relations