The Arabian Sea Mini Warm Pool matures in the southeastern Arabian Sea in May, and the influence of the ocean and atmosphere on its formation has been debated for the past 2 decades. Using a coupled numerical model, our study concludes that both oceanic and atmospheric conditions are necessary for its genesis. For instance, in a robust Mini Warm Pool year, the pre-April ocean condition primarily influences its formation, which is further favored by the presence of a wind shadow zone.