My project aims to develop a quantitative understanding of precipitation around tropical mountains. Our first step is to develop a physics-based theory for the setting where a steady flow impinges perpendicularly on a mountain ridge; analogous to the Western Ghats of India, during the summer Monsoon. Future developments will consist in complexifying the problem to conform better to real-world mountains, where a complete atmospheric circulation can develop. This work will allow better preparation of the societies depending on freshwater input from mountains to future climate changes.