Mumbai experienced the first meaningful monsoon showers on June 21 after a prolonged dry spell, with light to moderate rainfall recorded across several suburbs including Ghatkopar, Worli, Lower Parel, and Chembur, while Thane residents reported the return of the characteristic petrichor. The India Meteorological Department issued a yellow alert for June 22 and 23, forecasting thunderstorms, lightning, and gusty winds, while also indicating that conditions are becoming favourable for further monsoon advancement over Maharashtra around June 23.
Meteorological observers noted that rainbands were forming over the Mumbai Metropolitan Region, alongside developing storm cells over the Western Ghats moving toward the coast. The earlier suppression of rainfall had been linked to the presence of dry mid-level air acting as a barrier to cloud development, weakening the convective system despite sufficient moisture availability from the Arabian Sea.
This dry air interference, explained through the process of entrainment, had been preventing cumulonimbus clouds from developing fully by evaporating moisture and collapsing cloud formation before rainfall could occur. With this inhibiting layer now weakening, atmospheric conditions are beginning to support the growth of deeper convective clouds.
Rainfall patterns are expected to become more organised as rainbands strengthen, driven by moisture inflow from the sea and storm cells triggered by the Western Ghats. These systems are likely to move toward the city, with south Mumbai receiving initial rainfall due to its coastal position, followed by broader coverage across the metropolitan region.
Further intensification of rainfall is anticipated over the coming days, particularly around June 25 and 26, as the monsoon circulation strengthens and spreads further into Maharashtra.
