Weather activity build-up was rather rapid, giving very little notice, as a warning of a storm. South Peninsula has picked up pre-monsoon activity for the last few days. More pre-monsoon showers are likely for Mumbai and suburbs. There is an uptick likely in the pre-monsoon activity, all along the coast. Aided by the orography of the region, thunderstorm activity will increase for Mumbai and its suburbs and continue till the arrival of the monsoon.